So much shit that can cause this man, bearing clearances can be a major factor, I don’t believe it would be anything to do with loss of oil pressure. Rip it apart, forge the bottom end, do it once, do it right, hopefully it hasn’t fucked the crank.
Absolutely gutted for you mate, been keen for an update on the Skyline but didn't expect nor want this to be it. Fingers crossed for the future of the old dog
These are single pulls im guessing in 3rd gear with intervals between pulls this isnt the type of continuous stress that leads to oil build up in the head which is constant for more then just 10-15seconds
Don't regurgitate stuff like this, they do have an issue with flow to the head but this happens when you're on limiter for a massive amount of time on high rpm big power cars that are improperly setup.
Youre tuner is most likley right.... Your bearings wont be damadged by just 4-5sec without oil. I think it sat for too long in a wett enviornment :// But its an easy fix in my opinion. You got it mate🙌
Sucks having a problem like that, I’ve had a lot of RBs myself I’ve got two GTRs I own and an s14 with a rb25 what could’ve happen is oil build up very common on the RB25det. Depending on the thickness of the engine oil being used and how long it has been sitting sounds like the most logical thing to look into because if it’s been on that oil for a good while without running after the motor was just sitting for 2 years, another important thing to remember is 400-500hp on stock bottom end is the limit on a laggier turbo where you’ll see full boost around 5k. From personal experience I bought a r33 GTST series 2 i wanted to push the stock bottom end and the car was sitting without ever being started for a little over a year and had penrite 10-50w threw a Garrett 3067r in it all the fuel stuff to run e85 Harlech 1500 etc etc. Done 4 runs had the car up to about 16psi and it made 344rwhp on 3rd run I said screw it let’s push for 19psi got the car on forth gear and after the pull was over on idle all we could hear was the bearing shit itself. Better off get the bottom end done and do head studs and retainers and car won’t have any issues running a responsive 500-600hp of course gearbox around 500 will need some work as thats the max you want to push on the 5 speed. I’m from Sydney and work with Croydon racing developments all the time I know a few really good RB builders down in VIC
Teaches you two things I learnt many years ago. 1.. if you want something done right do it yourself. 2... The only corner you cut on an engine build will come back to haunt you. Note- It's a 25 year old engine. It never had a rebuild. You cut too many corners. Start with the a full engine replaced and rebuilt is usually a good starting point. RBs oil pump are fickle things. Use a nitto or tomie pump next time. Often too much ignition timing can cause shock and flog the bearing out. He was adding ignition timing when it all turned to shit. Bloke hit me up it's not the end of the world just learning curve. I've had it happen too. I can point you in the right direction. Throw the whole bottom end in the bin and get your head redone and use an rb30 bottom end. And a nitto pump. Make U 600hp and be happy.. The only way to see what went wrong is pull the engine down. Check for detonation..check bearings and crank bores oil pump. It will tell a story. U can guess all day but until it's apart you don't really know what it is
And for the record I spent 7 years building an fj20 Datsun 1600 only to have the motor last 4 hours due to the oil filter rattling loose. It never happened again. I actually make little clamps up that prevent this now . At the time I was shattered. Remember get that 30 bottom and put the two five head on U going to turn it into a ziller killer. Do it
No mate, issue isn't oil getting in, it's that the oil doesn't drain from the head in an RB correctly it's their archilles. Tap in second oil drain feed to the head before you think about a pump
@@ryanmchugh2709 head flooding is only an issue on RB engines which stay at high RPM for a sustained amount of time, certainly not dyno pulls, I suggest you do some research before spreading misinformation online
If you end up reusing that block and head make sure it's thourly cleaned if it's spun a bearing and all oil passages are cleaned. I'd also recommend upgrading the oil pump and installing a head drain kit at some stage too so sad to see this happen to your car but hopefully you get alot of awesome feed back and some reputable people jump in to point you in the right direction. Good luck anyway and can't wait to see what your decision ends up being with this car
As someone who is about to build his rb25, always tear it down and inspect it before install, it might suck to get it out back together or the cost of the labour, but its worth it
After watching this and reading a decent amount of comments that I also agree about I suggest you start doing the engine yourself! I'm a Technician myself and I know you have the want for fast cars so Get It! Can not wait for the next upload.
Rbs are known for starving the bottom end of them, my recommendation is to upgrade the oil pump a tad more after upgrading internals, more than needed but not to big so you don’t starve the bottom end but so you also don’t drown the engine.
If you upgrade oil pump it will increase oil flow resulting in the head flooding quicker, if you upgrade the pump you NEED a head drain, stock pump is fine for 400 HP, the head will not flood on dyno pulls, RB heads flood upon sustained high RPM usage (without a head drain) like track use, please do some research before spreading disinformation online
RBs starve the bottom because the oil can't flow back from the head properly, it gets trapped in the head so there's less oil available for the bottom end. Best solution for that is actually to limit the flow of oil into the head (with restrictors) or add an additional head drain. Both are really common mods, you'll find kits for them online. The other issue the RBs have is dodgy engagement of the oil pump gear, they usually fail catastrophically if that fails.
Always rebuild an engine when it's out. I had my blacktop 20v spun bearing twice due to a bad oil pump. The pump might not be cracked but the clearance is not right.
Best thing you should of done and what you probably now know is when you got that other engine, you should of took it apart and gave it a full health check and more or so built it before sticking it in the car. That way you wouldn't of had to pay an additional 2x the price of removal and installation costs. Do it once, cry once. Hope everything works out bro as i know the feeling all to well when shit breaks from my younger know it all days and now that I'm older and wiser i no longer do things half baked and spend the money to get it done right the first time ✌️.
To me oil pressure issues don’t usually cause damage within a couple seconds unless it was down on the drive there but as the tuner said it’s still got oil pressure when he looked. Corrosion can occur obviously but If the engine is properly sealed you shouldn’t have any corrosion. I myself have started an engine sitting for 6 yrs sealed properly with no hassles and drove it for a good while and no issues. My bet would be bearing clearances are out by a bit and finally let go after the dyno runs. All and all hope it’s nothing major. My opinion would be do the research, build it yourself and build it properly. I had a cruiser that was built but built wrong so I re done it and could have been happier with it now. Good luck and I hope to see more of this content (hopefully with it making bulk power)
It could be many things man, from my experience its more likely its the engines past life. Don't give up but! it always seems like the end but its just a hiccup. Do some research for who's a good engine builder down your way and hit them up do the engine right the first time and then it'll last for as long as you need these engines don't need much to be bullet proof
Did you prime the oil pump and filter by cranking the engine before actually starting it? If there wasn’t any oil on inside of the bearings running through the big end holes those few seconds of pressure from combustion could have caused slight metal on metal and that would explain why it didn’t just immediately start knocking there, corrosion from lack of use on the bearings is a tricky one because iv seen people start and use engines for years that have been out in a barn for decades, was the engine full of oil when you first got it? Might just be a mix of all factors, head up though my old land cruiser spun a bearing mid road trip around aus and i got stuck in a small town for 3 months so theres always worse
You don't need to crank the engine to "prime" the oil pump. A properly assembled engine can run for a while without oil pressure and assembly lube is usually pretty thick so it doesn't matter. On many cars, the oil pump just does jot generate enough pressure from slowly turning over anyway so you just need to send it.
This is why i left RB's kept running bearings an just didn't have the funds at the time to do it right. But can make em as reliable as the old Jz's just takes tackling the oil flaws. Bore out the oil tappets to the overall max size of 1mm im pretty sure but double check, oil pan resister an a proper Nitto oil pump. Don't believe the N1 pump hype, pop that just as much. and lastly an head oil drain. These things all will help form a somewhat reliable RB. People close to me that have done this haven't popped open there RB's in years an drive it hard. Problem with them is no matter how you build them without sorting their oil issues you're just gotta spit all your oil in ya head an run bottom end dry no matter the power, They hate high rpm only for the fact oil flows into head faster than it drains back into pan. Keen to see the future! Hope abit of useful info in this for ya
drain the oil would be a start and if there is brass in the oil that means that there is a spun bearing for sure. I could be wrong but from what I was told that would be a good starting point
I have an ae86 and I just recently had my engine fail. Now I've got h beam rods and higher compression pistons and in a few weeks it all goes back together. Don't feel defeated. I've been building my car 6 years and it's finally starting to come together. Keep having fun with your shit boxes.
The first seconds of engine start are the worse to the engine, cold oil, thinner, all parts of the engine are cold, since the oil is thinner is does require more pressure to maintain the oil film between the bearing and the crankshaft. The most stress is during when the engine is started. So yes, i guess the bearing suffered the damage when the engine was started without having oil pressure needed. But as you said, it's a huge learning oportunity!
Depends how the oil flows within the engine. If the cooler is before the bearings, yes it’s from the oil leak as the bearings did not receive any oil during the start up.
Just found your channel and reckon you have plenty of space at your place. Pull the motor and pull it apart yourself. Check everything and learn the skills to do the job yourself, because that way it gets done right. Anything you need done like machining, send that out to be done. I rebuilt my Ford Cleveland with a Gregory's manual and a couple of local mechanic shops for boring, chemical cleaning...I had no experience... Engine still runs after 35 years.
It is entirely possible that those revs you guys where filming earlier in the day after sitting for so long caused the bearings to start to spin, (corrosion) then it fully spun one on the dyno after making too many passes too quickly. (RB Oil flow issues) Best advice is to not rev or give an engine that has sat for a while the beans for a few hundred Km treat it like a new engine that's breaking in cause that's pretty much what you're doing breaking it in again. (or rubbing off the corrosion if you will)
hey man, i got my r32 after dreaming about it for years. 26. drove it across the US. i was like elivs. my dad had no idea what the car was and was amazed by it. the next day i took the turbo restrictor off and took some friends out. sure enough, my first day with my dream car i got rodknock. engines are expensive. it sucks
I hope the 32 wasn’t a GTR the RB26 is super strong and rods are a lot of money for them compared to other motors. If it was the 26 did you still have the factory twins or N1 ?
@@manhattanskyline4526 hey, its a rb26. factory twins and everything. pretty sure i was revving it too high on the highway. 7500, 8k on a shortnose crank, learned my lesson. going to be rebuilt soon
I (not a trained mechanic but with a bit of knowledge about straight 6's) would say it's a mixture of the oil pump and being left for that time. I know of some inline 6's that have powdered metal oil pump gears known to crack and cause problems after time and hard use. usually there relatively easy to replace if it is the case.
A spun bearing is usually loss of oil pressure but could also be low oil, over loading the motor even excessive heat... As to why its losing pressure could be the wrong oil, oil pump is damaged or worn out even a clogged oil filter... The first start up wouldn't have really coursed it to spin the bearing unless the motor was already on its last legs after all you noticed it in a few seconds and shut it down... My guess the engine wasn't in the best condition when you bought it...
Bob Ross said it beautifully “gotta have the dark in order to have the light” if you choose to rebuild it, it’s just gunna make driving it even more fun.
Just be prepared to be building these engines regularly! A friend of mine has owned a few gtst and a GTr and they all needed to have engine rebuilds done and multiple times! Nissan make very soft motors! Most people can't afford to put 30k into an Engine to make it be reliable on these skylines, Just be prepared as it will definitely give up again at some stage!
Yeah bro there are so many damn things that it 'could' be, but the questions you're asking point you in the right direction. Loss of oil pressure wouldn't usually cause this - as old mate was saying, a possible contaminate has entered the bearing and this could have been due to those 3 seconds that it was open for, floating around till after the initial tune and decided to land in the bearing after it, hell could've happened on your drive there.... Because so many things are at play, going through 1 by 1 to eliminate possibilities is the only way to find the issue.
It's a 30yo stock rb, it could be a range of factors. Either way it's cooked but on the bright side now you can build it up knowing exactly what's done to it and have peace of mind.
This is the gamble with used motors. RB's can take a serious beating and show good compression, but their pumps don't like smashing limiter. Their pump drive acts like a hammer effect of an impact driver, hence the upgrade is a splined collar like Toyota. Maybe try find a cheap RB30 block if they're not worth a million dollars.
As a journeymen mechanic in Canada my thoughts are mix of dodgy engine, but also very likely that it sat in my opinion. You never know an engines previous life, and if you know it did sit, then why did it sit. That right their in my opinion says a lot. Best of luck Benny, You in my opinion are best to pull the engine fix it and have an amazing car that not many others have.
I have an unopened S2 25DET in my 32 making 550whp its a dedicated drift car so I flog the life out of it and change the oil every 3 track days with no issues, likely the motor was opened or you had an oiling issue during the pulls / driving.. set of rods, bearing and pitsons will do you right and make a healy 500-600whp all day every day.
That’s a real shame buddy, sounds like a big ends gone unfortunately. Always when I’ve fitted an engine I crank it with the coils off until it’s built oil pressure and the oil light goes off. If you think about it that engines been sat for 2 years so all the oils gone from around those crank bearings, starting it wouldn’t of helped at all with no oil pressure. Also if you have got an external oil cooler you have to remember the oil has to go from the oil pump down the pipe to the oil cooler and fill that up (if it’s a big cooler it takes a bit), then back up the cooler pipe to the engine and then get pumped all round the engine. So hopefully they cranked it for a while to build that pressure up once they fitted the oil cooler before starting it cause your not talking 3 seconds of no oil your more talking 15-20 seconds of running till the oil gets round everywhere. On another note you’ll need to really clean out the turbo oil feed pipe and turbo bearings to make sure there’s no crank bearing debris in there, be the icing on the cake if that goes next. Good luck buddy, hope to see it back together and running well 👍
Wish you luck bro. We can learn from mistakes from the present and past to avoid them form happening in the future. Something tells me you'll make a more 🔥 skyline in the future bro.
Pressure test will never show a spun bearing... But you can check to oil for metal powder, especially in the oil filter. That is when you already have the 'knock'. Its not showing much before that.
if i can give you any advice, no matter how much you trust the original dudes they still forgot the pluming, go to a different shop and get it done right
Not sure about 3 seconds but I had a oil pressure relief valve break on my RB26 (bolt fell in the sump , essentially byassing the oil pump so zero oil press.) and 1 minute idling was enough to to mangle bearings and also cook my crank; Also that was on a brand new engine , new bearings etc...
Most common shit on rbs, oil starvation on starvation, need to check the pressure all the time, id say tuner also needed to see if there was problem, it got pushed too much for tune and just effid it up. Also if you didnt install oil head drain kit, it helped on my bros rb26 what pushing 700+hp. But keep it up, dont give up :)
ild start by checking the oil pump if its cracked, it is shit, but lucky that happend on the dyno with his headphones hooked up tbh, if it hapened later at higher rpm and went un noticed it could have thrown a rod out the block. keep on it!
No point asking questions, no point in blaming anyone. Should have stripped and inspected the engine before installing - live and learn... good luck with the rebuild!
Id start here, no matter what you need new bearings so get those on deck, id also pick up a oil pump and pressure test all the gallerys for oil aka the passages to see if its leaking somewhere, do a headgasket test to see if any combustion is getting into the coolant, thats the path id take// i think its badluck and just a dodggy engine that sat for quite some time but id attack it that dirrection
Do an oem engine refresh yourself. I did one on my sr20 during covid, first time ever. Cost 800 in machine work. Just folow the manual, pretty easy. Good content for you channel too
Ive got a stock rb30, i changed the oil and the rubber seal stayed on the block when i put the new filter on, started it and ran it for atleast 10-20 seconds before realising oil was pissing out,exactly like yours with close to no oil pressure. at the time the motor had roughly 380-390 thousand ks, i higly doubt the 3 or 4 seconds yours ran for is the issue mines still going strong
Iv been/going thru this with my heavily modified hilux surf. You fix one thing to break another and sometimes it all ends in catastrophe.. Well spoken man ! Dont give up on the dream ! you'll get there.
probably a combination of little or no oil pressure+ the engione sitting around not running for a few years and not being properly serviced before starting there is a fair bit of prep work to get an engine running right after years of not running.
As for your questions, the answer may be a combination of a few or all of your hypothesis. Only thing you can do is tear the engine down and check every possible cause and have it rebuilt right.
Pull motor out pull crank out inspect and if damage isn’t to bad get it linished if needed otherwise polished, get bearings to suit whether it be Standard or oversized depending on damage(get shop to match bearings size to crank) flush out motor all oil journals etc put back together replace oil pump off you go while you their do timing belt or whatever needs to be done and off you go
Oh man that sucks my first ever build I did a single turbo conversion on my 98 legacy while it was my daily and studying I got it too run and I thought I'd cracked it. 1 week later I spun the bearing. Learnt early on second hand engines are no Bueno unless its some old hilux diesel motor or in my case td27 best second hand boi I ever bought. Anyway paid someone to build a forged engine. First drive drove to the servo with smoke pouring out the bonnet gas station clerk rushes over thinking I'm on fire. I say to him " nah mate fresh build heat wraps just bedding in" look under the car an enormous oil puddle is forming, I didn't do the turbo oil feed up properly. That engine even with its incorrect ring gaps that made it consume more oil than a tired 2 stroke chainsaw took me too and from multiple track days and hill/touge sessions. On paper the old leggy is a massive heap but it's my first car 10+ cars later its still in my driveway but I love it and it's taught me so much. I'm just so glad I pushed through the failures now I have 2 more projects and flipper projects on the go. This cars 6 speed swapped dccd too for the subaru nerds and getting a big old g30-660 turbo and the most hectic engine I've ever built can't wait cars are something else I'd be lost without em.
When this happens nothing can prevent it when it happens, possibly it had a bad previous owner who didn't change oil in time, sitting for a while could have done this if it sit with water inside like an engine with a blown gasket for example, running for 3 seconds dry couldn't possibly have done this because when you start the car it always runs dry for a second or 2, meaning it would have to run at least 30 seconds until things start to seize... Overall I would just replace bearings get everything measured and checked, because yeah modifying a car beyond 400hp you would then need to upgrade other things like brakes for example, great content btw!
Build it up with sexy tuning parts mate , buy an engine jig , strip it and take engine parts to the machine / tuning shop . Yeah $8000 hurts . But when you know it's done right , it's done right and run your 550hp as a daily dream .
i am a mobile plant mechanic which is a much higher qualification than most of the dealership mechanics I am seeing in the comments my 2 cents is, 3 seconds of low oil pressure is not enough time for a spun bearing ( I have seen 16 litre engines run with no oil pressure for around 10-12 seconds and not spin a bearing), corrosion should not happen inside an engine with enough oil in it as the bearings should remain coated in oil stopping corrosion even if not started, I would say the most likely fault would be a dodgy engine which was tipped over the edge by increased power without actually doing a proper inspection of the internal condition, i have a 632 BHP rb25 so i can speak from a place of experience when modifying these engines
Just found your channel through this video. Super unlucky man, I had issues with my built SR after paying someone to sort out the machine work for me and like you said the only way is to push through it and find out why it happened and then fix the issue and resulting damage. Sucks to see it happen but I’m keep to see you get it sorted! Just subbed for updates 🤙
Man i swear ive seen videos on this car, it must have been your main channel. I remember seeing you blow all the oil onto the ground! bout to binge the fuck out of this channel to catch up haha
That sucks mate. RB are praised but they have oil starvation problems once you start modifying it. However, it could be bearing clearance, or even the engine's past life also. It really sucks though
Rb are a pain for oil pressure! I had to spend so much on my rb20 to make oiling work well, N1 pump, billet gears, head drain, oil feed restrictors, and then was getting around the 80-90psi
hey man...i dont know about too much about GTRs but hearing the engine sound thats scraping against metal is really bad news. from my experience...i didnt go all through that risk..the first instance the engine seized (soon to die actually) i sold my car even though the body interior everything is awesome except the engine. i had some losses too..all of us...so be strong man...there must be a way....dont get stressed a lot. greetings from Manila
mate , i had a rod cap come loose on my rb25 at tide just before going on dyno , caught it early no damage to crank got new bearing and was sweet made 290 to rear hubs a@14psi ( in my gu patrol) this was all done with motor still in the car , just able to take sump off and dirrectly access
Love the dyno guy, get a nice vibe from him that he actually cares about other peoples cars.
Necro posting, I know. But you're going to just LOVE "PFI Speed", with Brent. He is 1000x this tuner when it comes to vibes.
So much shit that can cause this man, bearing clearances can be a major factor, I don’t believe it would be anything to do with loss of oil pressure. Rip it apart, forge the bottom end, do it once, do it right, hopefully it hasn’t fucked the crank.
I wish surge would forge my bottom end
@@theowainwright7406 unreal 😂
well if you are gonna forge bottom end then there is literally no point keeping stock crank as that will limit options down the track
@@ballydup6423 People have made 800hp+ on the stock crank, no point in replacing it if it's in good condition.
Who straight starts a engine that's been sitting. Kill fuel or spark to build oil pressure for this reason
Absolutely gutted for you mate, been keen for an update on the Skyline but didn't expect nor want this to be it. Fingers crossed for the future of the old dog
Oil likes to get stuck in the head of rbs under continuous stress and thats when you spin a bearing
These are single pulls im guessing in 3rd gear with intervals between pulls this isnt the type of continuous stress that leads to oil build up in the head which is constant for more then just 10-15seconds
the oil would not of flooded the head on these pull, especially considering the rpm range and power it is making
I'm no rb. Expert but I've heard about a external drain you can add to the back of the head i believe a Australian company makes a kit.
Don't regurgitate stuff like this, they do have an issue with flow to the head but this happens when you're on limiter for a massive amount of time on high rpm big power cars that are improperly setup.
Not even pushing it enough to be head drain issue 🤦 🤷🏼♀️
Youre tuner is most likley right.... Your bearings wont be damadged by just 4-5sec without oil. I think it sat for too long in a wett enviornment ://
But its an easy fix in my opinion. You got it mate🙌
Sucks having a problem like that, I’ve had a lot of RBs myself I’ve got two GTRs I own and an s14 with a rb25 what could’ve happen is oil build up very common on the RB25det. Depending on the thickness of the engine oil being used and how long it has been sitting sounds like the most logical thing to look into because if it’s been on that oil for a good while without running after the motor was just sitting for 2 years, another important thing to remember is 400-500hp on stock bottom end is the limit on a laggier turbo where you’ll see full boost around 5k.
From personal experience I bought a r33 GTST series 2 i wanted to push the stock bottom end and the car was sitting without ever being started for a little over a year and had penrite 10-50w threw a Garrett 3067r in it all the fuel stuff to run e85 Harlech 1500 etc etc.
Done 4 runs had the car up to about 16psi and it made 344rwhp on 3rd run I said screw it let’s push for 19psi got the car on forth gear and after the pull was over on idle all we could hear was the bearing shit itself.
Better off get the bottom end done and do head studs and retainers and car won’t have any issues running a responsive 500-600hp of course gearbox around 500 will need some work as thats the max you want to push on the 5 speed.
I’m from Sydney and work with Croydon racing developments all the time I know a few really good RB builders down in VIC
Teaches you two things I learnt many years ago.
1.. if you want something done right do it yourself.
2... The only corner you cut on an engine build will come back to haunt you.
Note-
It's a 25 year old engine.
It never had a rebuild.
You cut too many corners.
Start with the a full engine replaced and rebuilt is usually a good starting point.
RBs oil pump are fickle things.
Use a nitto or tomie pump next time.
Often too much ignition timing can cause shock and flog the bearing out.
He was adding ignition timing when it all turned to shit.
Bloke hit me up it's not the end of the world just learning curve.
I've had it happen too.
I can point you in the right direction.
Throw the whole bottom end in the bin and get your head redone and use an rb30 bottom end.
And a nitto pump.
Make U 600hp and be happy..
The only way to see what went wrong is pull the engine down.
Check for detonation..check bearings and crank bores oil pump.
It will tell a story.
U can guess all day but until it's apart you don't really know what it is
And for the record I spent 7 years building an fj20 Datsun 1600 only to have the motor last 4 hours due to the oil filter rattling loose.
It never happened again.
I actually make little clamps up that prevent this now .
At the time I was shattered.
Remember get that 30 bottom and put the two five head on U going to turn it into a ziller killer.
Do it
100% oil pump failure. Even the OEM pumps are weak. I think the oil needs to loop threw the oil cooler so it can feed back across the head 😢😢
No mate, issue isn't oil getting in, it's that the oil doesn't drain from the head in an RB correctly it's their archilles. Tap in second oil drain feed to the head before you think about a pump
@@ryanmchugh2709 head flooding is only an issue on RB engines which stay at high RPM for a sustained amount of time, certainly not dyno pulls, I suggest you do some research before spreading misinformation online
@@ryanmchugh2709 Its their achilles on 600+hp cars running under extreme conditions for long periods of time (think track, drifting, or drag racing)
I love the format of the video, feels like a documentary. Saw this video in my recommended, now I got to watch them all
If you end up reusing that block and head make sure it's thourly cleaned if it's spun a bearing and all oil passages are cleaned. I'd also recommend upgrading the oil pump and installing a head drain kit at some stage too so sad to see this happen to your car but hopefully you get alot of awesome feed back and some reputable people jump in to point you in the right direction. Good luck anyway and can't wait to see what your decision ends up being with this car
Oh how the tables have turned. Gonna be so much more rewarding when it's fully forged and rippin shit up
As someone who is about to build his rb25, always tear it down and inspect it before install, it might suck to get it out back together or the cost of the labour, but its worth it
And while you are in there you can put the restrictor in the block to reduce the oil going to the head.
After watching this and reading a decent amount of comments that I also agree about I suggest you start doing the engine yourself! I'm a Technician myself and I know you have the want for fast cars so Get It! Can not wait for the next upload.
Rbs are known for starving the bottom end of them, my recommendation is to upgrade the oil pump a tad more after upgrading internals, more than needed but not to big so you don’t starve the bottom end but so you also don’t drown the engine.
If you upgrade oil pump it will increase oil flow resulting in the head flooding quicker, if you upgrade the pump you NEED a head drain, stock pump is fine for 400 HP, the head will not flood on dyno pulls, RB heads flood upon sustained high RPM usage (without a head drain) like track use, please do some research before spreading disinformation online
Billet oil pump gears
RBs starve the bottom because the oil can't flow back from the head properly, it gets trapped in the head so there's less oil available for the bottom end. Best solution for that is actually to limit the flow of oil into the head (with restrictors) or add an additional head drain. Both are really common mods, you'll find kits for them online. The other issue the RBs have is dodgy engagement of the oil pump gear, they usually fail catastrophically if that fails.
Always rebuild an engine when it's out.
I had my blacktop 20v spun bearing twice due to a bad oil pump. The pump might not be cracked but the clearance is not right.
Best thing you should of done and what you probably now know is when you got that other engine, you should of took it apart and gave it a full health check and more or so built it before sticking it in the car. That way you wouldn't of had to pay an additional 2x the price of removal and installation costs.
Do it once, cry once.
Hope everything works out bro as i know the feeling all to well when shit breaks from my younger know it all days and now that I'm older and wiser i no longer do things half baked and spend the money to get it done right the first time ✌️.
To me oil pressure issues don’t usually cause damage within a couple seconds unless it was down on the drive there but as the tuner said it’s still got oil pressure when he looked. Corrosion can occur obviously but If the engine is properly sealed you shouldn’t have any corrosion. I myself have started an engine sitting for 6 yrs sealed properly with no hassles and drove it for a good while and no issues. My bet would be bearing clearances are out by a bit and finally let go after the dyno runs. All and all hope it’s nothing major. My opinion would be do the research, build it yourself and build it properly. I had a cruiser that was built but built wrong so I re done it and could have been happier with it now. Good luck and I hope to see more of this content (hopefully with it making bulk power)
It could be many things man, from my experience its more likely its the engines past life. Don't give up but! it always seems like the end but its just a hiccup. Do some research for who's a good engine builder down your way and hit them up do the engine right the first time and then it'll last for as long as you need these engines don't need much to be bullet proof
Love the optimism! remember setbacks are just a way to prepare you for a bigger comeback! Good luck and can't wait!
Did you prime the oil pump and filter by cranking the engine before actually starting it? If there wasn’t any oil on inside of the bearings running through the big end holes those few seconds of pressure from combustion could have caused slight metal on metal and that would explain why it didn’t just immediately start knocking there, corrosion from lack of use on the bearings is a tricky one because iv seen people start and use engines for years that have been out in a barn for decades, was the engine full of oil when you first got it? Might just be a mix of all factors, head up though my old land cruiser spun a bearing mid road trip around aus and i got stuck in a small town for 3 months so theres always worse
any competent engine builder would've done this. but who knows since they forgot to hook up the oil cooler lines
@@Predictabletv how do they not triple check everything before first start..... especially something you can see so easily...
@@Predictabletv hahahaah man they are always charging top dollar as well
You don't need to crank the engine to "prime" the oil pump. A properly assembled engine can run for a while without oil pressure and assembly lube is usually pretty thick so it doesn't matter. On many cars, the oil pump just does jot generate enough pressure from slowly turning over anyway so you just need to send it.
@@jordanlazarus7345 yeah of course but this wasn’t a new engine nor did it have the crank out or bearings done
Rebuild with FORGED internals!!!! GO for 600!!! Love you content!
This is why i left RB's kept running bearings an just didn't have the funds at the time to do it right. But can make em as reliable as the old Jz's just takes tackling the oil flaws. Bore out the oil tappets to the overall max size of 1mm im pretty sure but double check, oil pan resister an a proper Nitto oil pump. Don't believe the N1 pump hype, pop that just as much. and lastly an head oil drain. These things all will help form a somewhat reliable RB. People close to me that have done this haven't popped open there RB's in years an drive it hard. Problem with them is no matter how you build them without sorting their oil issues you're just gotta spit all your oil in ya head an run bottom end dry no matter the power, They hate high rpm only for the fact oil flows into head faster than it drains back into pan. Keen to see the future! Hope abit of useful info in this for ya
drain the oil would be a start and if there is brass in the oil that means that there is a spun bearing for sure. I could be wrong but from what I was told that would be a good starting point
I have an ae86 and I just recently had my engine fail. Now I've got h beam rods and higher compression pistons and in a few weeks it all goes back together. Don't feel defeated. I've been building my car 6 years and it's finally starting to come together. Keep having fun with your shit boxes.
The first seconds of engine start are the worse to the engine, cold oil, thinner, all parts of the engine are cold, since the oil is thinner is does require more pressure to maintain the oil film between the bearing and the crankshaft. The most stress is during when the engine is started.
So yes, i guess the bearing suffered the damage when the engine was started without having oil pressure needed.
But as you said, it's a huge learning oportunity!
Depends how the oil flows within the engine. If the cooler is before the bearings, yes it’s from the oil leak as the bearings did not receive any oil during the start up.
love a skyline
yeee
This guy is like a breath of fresh air for car content
dont let this channel die these vids are good as.
the channel wont die he just uploaded the first vids lol
Oh man, my RB got piston slap, and I ran it hard for 4 years before sending it in for a full build. You’ll be happy with that HKS stroker kit :-)
Just found your channel and reckon you have plenty of space at your place. Pull the motor and pull it apart yourself. Check everything and learn the skills to do the job yourself, because that way it gets done right. Anything you need done like machining, send that out to be done. I rebuilt my Ford Cleveland with a Gregory's manual and a couple of local mechanic shops for boring, chemical cleaning...I had no experience... Engine still runs after 35 years.
That Chris is an absolute legend mate
so glad you started up this channel
It is entirely possible that those revs you guys where filming earlier in the day after sitting for so long caused the bearings to start to spin, (corrosion) then it fully spun one on the dyno after making too many passes too quickly. (RB Oil flow issues) Best advice is to not rev or give an engine that has sat for a while the beans for a few hundred Km treat it like a new engine that's breaking in cause that's pretty much what you're doing breaking it in again. (or rubbing off the corrosion if you will)
Dyno pulls would not cause head flooding which is what i assume you mean by (RB oil flow issues)
hey man, i got my r32 after dreaming about it for years. 26. drove it across the US. i was like elivs. my dad had no idea what the car was and was amazed by it. the next day i took the turbo restrictor off and took some friends out. sure enough, my first day with my dream car i got rodknock. engines are expensive. it sucks
I hope the 32 wasn’t a GTR the RB26 is super strong and rods are a lot of money for them compared to other motors. If it was the 26 did you still have the factory twins or N1 ?
@@manhattanskyline4526 hey, its a rb26. factory twins and everything. pretty sure i was revving it too high on the highway. 7500, 8k on a shortnose crank, learned my lesson. going to be rebuilt soon
I (not a trained mechanic but with a bit of knowledge about straight 6's) would say it's a mixture of the oil pump and being left for that time. I know of some inline 6's that have powdered metal oil pump gears known to crack and cause problems after time and hard use. usually there relatively easy to replace if it is the case.
the gear could have cracked and reduced oil flow. the noise could either be the oil pump or a bearing starved of oil
head drain fresh bearings rings and agood oil pump with some good machine shop shell be golden
Glad to have this channel!
A spun bearing is usually loss of oil pressure but could also be low oil, over loading the motor even excessive heat... As to why its losing pressure could be the wrong oil, oil pump is damaged or worn out even a clogged oil filter... The first start up wouldn't have really coursed it to spin the bearing unless the motor was already on its last legs after all you noticed it in a few seconds and shut it down... My guess the engine wasn't in the best condition when you bought it...
just genuine wear and tear with sounds of it
Your motors knocking hard tonight
Bob Ross said it beautifully “gotta have the dark in order to have the light” if you choose to rebuild it, it’s just gunna make driving it even more fun.
Just be prepared to be building these engines regularly! A friend of mine has owned a few gtst and a GTr and they all needed to have engine rebuilds done and multiple times! Nissan make very soft motors! Most people can't afford to put 30k into an Engine to make it be reliable on these skylines,
Just be prepared as it will definitely give up again at some stage!
Man I think it's just lack of knowledge, in new Zealand RBs are built extremely tough and well and most of them are stock block plus ts haha
Yeah bro there are so many damn things that it 'could' be, but the questions you're asking point you in the right direction. Loss of oil pressure wouldn't usually cause this - as old mate was saying, a possible contaminate has entered the bearing and this could have been due to those 3 seconds that it was open for, floating around till after the initial tune and decided to land in the bearing after it, hell could've happened on your drive there.... Because so many things are at play, going through 1 by 1 to eliminate possibilities is the only way to find the issue.
It's a 30yo stock rb, it could be a range of factors. Either way it's cooked but on the bright side now you can build it up knowing exactly what's done to it and have peace of mind.
2:57 that pokemon yellow version brought back the memories 💛
This is the gamble with used motors. RB's can take a serious beating and show good compression, but their pumps don't like smashing limiter. Their pump drive acts like a hammer effect of an impact driver, hence the upgrade is a splined collar like Toyota. Maybe try find a cheap RB30 block if they're not worth a million dollars.
As a journeymen mechanic in Canada my thoughts are mix of dodgy engine, but also very likely that it sat in my opinion. You never know an engines previous life, and if you know it did sit, then why did it sit.
That right their in my opinion says a lot.
Best of luck Benny, You in my opinion are best to pull the engine fix it and have an amazing car that not many others have.
I have an unopened S2 25DET in my 32 making 550whp its a dedicated drift car so I flog the life out of it and change the oil every 3 track days with no issues, likely the motor was opened or you had an oiling issue during the pulls / driving.. set of rods, bearing and pitsons will do you right and make a healy 500-600whp all day every day.
Spun bearing can happen from improper bearing clearance and contamination. Keep the video going nearly cried when I heard that noise.
That’s a real shame buddy, sounds like a big ends gone unfortunately. Always when I’ve fitted an engine I crank it with the coils off until it’s built oil pressure and the oil light goes off. If you think about it that engines been sat for 2 years so all the oils gone from around those crank bearings, starting it wouldn’t of helped at all with no oil pressure. Also if you have got an external oil cooler you have to remember the oil has to go from the oil pump down the pipe to the oil cooler and fill that up (if it’s a big cooler it takes a bit), then back up the cooler pipe to the engine and then get pumped all round the engine. So hopefully they cranked it for a while to build that pressure up once they fitted the oil cooler before starting it cause your not talking 3 seconds of no oil your more talking 15-20 seconds of running till the oil gets round everywhere.
On another note you’ll need to really clean out the turbo oil feed pipe and turbo bearings to make sure there’s no crank bearing debris in there, be the icing on the cake if that goes next.
Good luck buddy, hope to see it back together and running well 👍
Wish you luck bro. We can learn from mistakes from the present and past to avoid them form happening in the future. Something tells me you'll make a more 🔥 skyline in the future bro.
I personally would recommend getting an N1 oil pump and billet gears from Platinum racing products. That's one of many things I'm doing to my RB25DE.
Sorry for your loss brother 😅 33’s are fun aren’t they
The rb26 never disappoints with how unreliable it is
That’s not an rb26 bruh, when I had an rb thing would live on the limiter and it was unkillable
Pressure test will never show a spun bearing... But you can check to oil for metal powder, especially in the oil filter. That is when you already have the 'knock'. Its not showing much before that.
if i can give you any advice, no matter how much you trust the original dudes they still forgot the pluming, go to a different shop and get it done right
Thank you man for sharing this stuff
Not sure about 3 seconds but I had a oil pressure relief valve break on my RB26 (bolt fell in the sump , essentially byassing the oil pump so zero oil press.) and 1 minute idling was enough to to mangle bearings and also cook my crank; Also that was on a brand new engine , new bearings etc...
Just found your channel yesterday, wicked videos mate
The car was designed to run 250-280HP. Go above that, you risk damage. I hear the rear head drain or oil pump upgrades can help.
Most common shit on rbs, oil starvation on starvation, need to check the pressure all the time, id say tuner also needed to see if there was problem, it got pushed too much for tune and just effid it up.
Also if you didnt install oil head drain kit, it helped on my bros rb26 what pushing 700+hp. But keep it up, dont give up :)
Whatever you do. DO NOT START IT BACK UP.. You'll smoke your crank and then be even farther in the hole
ild start by checking the oil pump if its cracked, it is shit, but lucky that happend on the dyno with his headphones hooked up tbh, if it hapened later at higher rpm and went un noticed it could have thrown a rod out the block. keep on it!
No point asking questions, no point in blaming anyone. Should have stripped and inspected the engine before installing - live and learn... good luck with the rebuild!
Your content is underrated bro, keep it up you’ll get the subs u deserve oneday💪🏼
Id start here, no matter what you need new bearings so get those on deck, id also pick up a oil pump and pressure test all the gallerys for oil aka the passages to see if its leaking somewhere, do a headgasket test to see if any combustion is getting into the coolant, thats the path id take// i think its badluck and just a dodggy engine that sat for quite some time but id attack it that dirrection
Loving these videos man. Keep it up and stay motivated through the hard parts.
Do an oem engine refresh yourself. I did one on my sr20 during covid, first time ever. Cost 800 in machine work. Just folow the manual, pretty easy. Good content for you channel too
Ive got a stock rb30, i changed the oil and the rubber seal stayed on the block when i put the new filter on, started it and ran it for atleast 10-20 seconds before realising oil was pissing out,exactly like yours with close to no oil pressure. at the time the motor had roughly 380-390 thousand ks, i higly doubt the 3 or 4 seconds yours ran for is the issue mines still going strong
Iv been/going thru this with my heavily modified hilux surf. You fix one thing to break another and sometimes it all ends in catastrophe.. Well spoken man ! Dont give up on the dream ! you'll get there.
probably a combination of little or no oil pressure+ the engione sitting around not running for a few years and not being properly serviced before starting there is a fair bit of prep work to get an engine running right after years of not running.
As for your questions, the answer may be a combination of a few or all of your hypothesis. Only thing you can do is tear the engine down and check every possible cause and have it rebuilt right.
8:47 got me creasing hahahahaha!
Pull motor out pull crank out inspect and if damage isn’t to bad get it linished if needed otherwise polished, get bearings to suit whether it be Standard or oversized depending on damage(get shop to match bearings size to crank) flush out motor all oil journals etc put back together replace oil pump off you go while you their do timing belt or whatever needs to be done and off you go
Oh man that sucks my first ever build I did a single turbo conversion on my 98 legacy while it was my daily and studying I got it too run and I thought I'd cracked it. 1 week later I spun the bearing.
Learnt early on second hand engines are no Bueno unless its some old hilux diesel motor or in my case td27 best second hand boi I ever bought.
Anyway paid someone to build a forged engine. First drive drove to the servo with smoke pouring out the bonnet gas station clerk rushes over thinking I'm on fire. I say to him " nah mate fresh build heat wraps just bedding in" look under the car an enormous oil puddle is forming, I didn't do the turbo oil feed up properly.
That engine even with its incorrect ring gaps that made it consume more oil than a tired 2 stroke chainsaw took me too and from multiple track days and hill/touge sessions.
On paper the old leggy is a massive heap but it's my first car 10+ cars later its still in my driveway but I love it and it's taught me so much. I'm just so glad I pushed through the failures now I have 2 more projects and flipper projects on the go.
This cars 6 speed swapped dccd too for the subaru nerds and getting a big old g30-660 turbo and the most hectic engine I've ever built can't wait cars are something else I'd be lost without em.
Just stumbled across this channel and I
Love it brother
When this happens nothing can prevent it when it happens, possibly it had a bad previous owner who didn't change oil in time, sitting for a while could have done this if it sit with water inside like an engine with a blown gasket for example, running for 3 seconds dry couldn't possibly have done this because when you start the car it always runs dry for a second or 2, meaning it would have to run at least 30 seconds until things start to seize...
Overall I would just replace bearings get everything measured and checked, because yeah modifying a car beyond 400hp you would then need to upgrade other things like brakes for example, great content btw!
Build it up with sexy tuning parts mate , buy an engine jig , strip it and take engine parts to the machine / tuning shop . Yeah $8000 hurts . But when you know it's done right , it's done right and run your 550hp as a daily dream .
6:58 sounded like rod knock for a sec
Thats literally what that sound is
@@byron1dagg80 its not but ok
@@bruhkillaq3034 what is it?
This vid has me hooked KNT , KEEN , HIT THAT BUTTON CNTS
i am a mobile plant mechanic which is a much higher qualification than most of the dealership mechanics I am seeing in the comments my 2 cents is, 3 seconds of low oil pressure is not enough time for a spun bearing ( I have seen 16 litre engines run with no oil pressure for around 10-12 seconds and not spin a bearing), corrosion should not happen inside an engine with enough oil in it as the bearings should remain coated in oil stopping corrosion even if not started, I would say the most likely fault would be a dodgy engine which was tipped over the edge by increased power without actually doing a proper inspection of the internal condition, i have a 632 BHP rb25 so i can speak from a place of experience when modifying these engines
We need a choe surge Collab to build the rb
Rb's are like a box of chocolate, ya never know what you're gonna get
Just found your channel through this video. Super unlucky man, I had issues with my built SR after paying someone to sort out the machine work for me and like you said the only way is to push through it and find out why it happened and then fix the issue and resulting damage. Sucks to see it happen but I’m keep to see you get it sorted!
Just subbed for updates 🤙
Man i swear ive seen videos on this car, it must have been your main channel. I remember seeing you blow all the oil onto the ground! bout to binge the fuck out of this channel to catch up haha
Pull it out, pull it apart, learn more, rebuild it. Less Rust grubbing, more time on the tools.
Motive reckons the best upgrade to RB engines is the Nismo Oil pump, Might be worth checking out what they suggest.
without respective mods (head drain) an upgraded oil pump will do more damage than good mate
me also spun a rod bearing = or two = new short block = ej207 RA spec C = $14,000
That sucks mate. RB are praised but they have oil starvation problems once you start modifying it. However, it could be bearing clearance, or even the engine's past life also. It really sucks though
Rb are a pain for oil pressure! I had to spend so much on my rb20 to make oiling work well, N1 pump, billet gears, head drain, oil feed restrictors, and then was getting around the 80-90psi
Just spun a bearing in my evo 8, that noise haunts me in my dreams
Honestly the color of the oil that shot of the hose should have been your first warning. Remember oil is cheap engines are expensive
from my experience it was a bearing clearances issues from the start and all it took was 1 pull for it to let loose
I highly doubt it, throwing a bearing from just a few seconds of no oil. Possible yes,likely no imo.
Miss my r33 so much
Oh looks like I'm not the only one trying to fix up JDM cars in a greenhouse...
Hope you'll be able to fix the engine
No oil feed to motor will kill it Fast! Rebuild It with Top Self parts. Since you got to pull it apart. Goodluck
hey man...i dont know about too much about GTRs but hearing the engine sound thats scraping against metal is really bad news. from my experience...i didnt go all through that risk..the first instance the engine seized (soon to die actually) i sold my car even though the body interior everything is awesome except the engine. i had some losses too..all of us...so be strong man...there must be a way....dont get stressed a lot. greetings from Manila
mate , i had a rod cap come loose on my rb25 at tide just before going on dyno , caught it early no damage to crank got new bearing and was sweet made 290 to rear hubs a@14psi ( in my gu patrol) this was all done with motor still in the car , just able to take sump off and dirrectly access