redoing another mechanic's job takes twice as long, and there are these setbacks. for the next you already know, how much time and money it will consume!
replace the oil cooler/coolers or flush them extremely well, flush the turbochargers etc... any metal shavings that are sitting in the block/ oil passages. You are extremely intelligent and I am sure you have thought of this but it would be a shame if some bearing material ruined this motor too! Maybe taking the head off again was a blessing in disguise?
You have come a long way from having some one else order main bearing for the e55 engine that you were rebuilding on the earliest videos on the channel to doing everything on your own, thanks for taking the time documenting all these, they are if nothing a very good source of well documented and concise information.
Might want to take the head to get resurfaced to take out as much of the knock damage as possible, because it can create hotspots and more knock. More knock = more damage, more damage = more knock.
Damn bro, I feel your frustration. Can't tell you how many times I've had to go behind another mechanic and fix every damn thing because they didn't have a clue about what they were doing. I usually now assume everything is bad until I check it lol. I'm so happy you got your business going and that you're doing well!
Man I love your work! I've been a subscriber for awhile now because of the ASL project. If I was in Canada I'd pay your shop a visit! Keep the videos coming!
Wait, if you do this measurement procedure to a mercedes engine, and the mercedes recommend to replace the bolt after using, that would be 2-3 sets of main cap bolt/rod bolt? Until you finally assembly the engine
I can't even comprehend how someone could have built that thing in such a way... Hopefully they are just some guy the owner knows and not an actual shop charging money!
I think I spotted remnants of plastigauge on the crank bearing surfaces. Also to get the longest life, and biggest HP number, balancing the rotating assembly as a whole is the key to success.
Ollie Mitchell if it’s like my 4 cyl 16 valve, there’s an assembly position with all the pistons part way down the cylinders so you can fit the cams in any position, then time the cams to the assembly position. Then you can set the exact cam timing with the adjustable pulleys.
I am done rebuilding m272 r350. Trued to start but after 1min idle engine dies and there’s lots of vibrates before engine dies. Check engine light shows random /multiple cylinder misfires. P0300. Any ideas or has anyone experienced that?
In Malaysia after we overhaul we say to customer to do not pass 3000 to 3500rpm until first 5000km(mileage)...after pass 5000km need to oil change after that customer just need regular oil change...
Out of interest why did you leave the water pump on during the rebuild? Having found out all the faults, I would have started from scratch by disassembling everything and not rely on the previous. Nice video tho, hopefully it will produce decent power. 🤞👍🏻
@@azargelin Right, but in this case you cannot trust the customer because they cannot accurately tell you how good the job was done. Yes it was the mechanics fault, but you're not talking with the mechanic.
Hey XF, I mostly enjoy your videos with education character. Can you hit us with some good sources related to automotive engineering (preferably electronics and engine management)? THANKS
Running tight main bearing clearances requires a rigid block (mostly meaning the "crank line" has to be well supported) and crankshaft that doesn't bend too much when revving higher that causes the crank to bend and twist surprisingly a lot.. sort of a problem for straight six engines when going to very rpm's (piston speeds). You'd better not run very thick oils with tight bearing clearances, like 20W50 or 10W60. More like 5W30 or 5W40, depending how high oil temperatures are reached (track days etc) and what clearances you are using. I wouldn't really like an idea of using e.g 0.04mm clearances with bearings, and running the engine with thicker than 10W40... but that's just my opinion! I bet someone will say the opposite tho, but I have my reasons for that. Hadn't the valve seats been machined when the engine was rebuilt previously?
Why dont you just micrometer each piston then zero the bore gauge against the reading ? And why dont you measure the bearing tunnel without bearings installed?
I can't believe he just put a new crank fresh out of box into a block without balancing it ..man the whole rotating assembly is new..It's crucial for the longevity of engine to balance a new setup.. especially if your going for big horsepower numbers ..And I don't think the crank is rotating so smoothly .It does look like he exert much more pressure than required.. i don't think its binding, maybe not enough lube ...Any way big fan since old days..Keep up the good work
If the crank is already balanced out of the box, there's no need. This seems to be OEM Nissan crank, so I'd rely that it is balanced. Only benefit would be balancing the flywheel together with it, but even that is unnecessary, if the flywheel is already balanced alone, too. And factory made engines have cranks and flywheels separately balanced, and then just installed. The installation won't make them imbalanced. Only thing I'd have done more than shown in this video is to match the conrod+piston weights as close each other as possible, as why would you not. The benefit once again will be quite small though, if the weights in a sold set have already been well balanced. The crank seems to rotate just fine, a properly torqued in tolerances crank will have some resistance in its turning. It won't be turning like a wheel in the air.
And I'd even say that balancing the crank and flywheel together to form a single balanced unit is not that good idea, if your flywheel for some reason needs replacing, you will need to strip the whole engine and also balance crank again with the new flywheel. It is better practice for most applications to balance them separately, unless you are building some crazy racing engine. There maybe some engines that use imbalanced flywheels to counter vibrations, so some engines may differ.
in stock application's everything is balanced now if u use light weight components then yes u need to balance and usally they avoid using the flywheel unless alot of weight needs to come off so flywheel balancing is rare outside racing engines
My dad used to build his own race cars 40 years ago, the only precision tools he had were a beat up beam torque wrench and those plastic gauges. He never blew engines, but was known for breaking axles. Looks like this guy built the engine from a box of parts without checking anything before or after putting it together.
Am I mistaken or was that deck not resurfaced at all? Should be standard procedure to do at least a single pass on the fly cut even if it appears straight at a glance
I wonder is that was the intended term for and engine when new. “Engine break-in” maybe it’s like engine breaking. Maybe that’s what the guys say when the on the dyno lol
That's one of the reason why I don't usually take half done jobs by other people. I tell customers to take it back to that person who did it cuz they would know what they fully did. Sometimes best to avoid than gambles
Dude... If you're gonna build performance engines, you gotta know what a main girdle is called. Your vids are great, and the ASL is super awesome, but you have to know what you're talking about when you're talking about it. Did you check valve lash?
I think he's as rough as the 1st guy that built it, did you see all the crap fall out of the head & into bores when he fitted the head, rough as guts you need a ring gap grinder not a bench grinder 🤷♂️🤷♂️
You think that in the mass engine production is there anyone weighing and balancing the connecting rods , pistons and the assembly of them? No. That's a job done in very high rpm and hp custom built engines. My experience in this matter says any new assembly is going to fit the tolerances
No, if everything is balanced separately and correctly. There's just that "if" - do you trust the parts supplier. Of course for high output (racing) engine, it is a good idea to balance and weight match everything to as high degree as possible.
electrician (not cars) here. two things i find myself repeating VERY often when faced with someone else's fuc.... i mean.. work: "Really??!!" and "you gotta be shitting me!!". so i understand your frustration.
You never ever get the same reading twice using telescopic gauges, inside micrometer & dial bore gauge is the method used by professionals. Those bores look f@#ked were they torque plate honed?
I really can't understand why you were surprised that the head was badly machined by the "wheelbarrow mechanic" that previously built this engine 🤔 Good meticulous work on checking the clearances but I was disappointed to see traces of plastigauge left on the crank.
So the original head was stock valves just new seats? I can't see how you can mess that up. The pitting on the valve seats looks like he's pulled rusty old valves out from under the bench! Unless to save money he ground the seats with a die grinder. Or just left schmutz in the engine so as soon as it made compression it destroyed the seats. Incorrect clearances I can get. Measuring is technical and if you don't do it much its very time consuming. Even the crank I can understand if he has spun it up on a lathe and used emery tape to polish the journals and been too aggressive. But how do you ruin valve seats? You put the head in the thing, dial up the size and angle and the machine does it for you! You don’t even need to polish them if you don't want.
I bet you that this "previous mechanic" that had no idea what they were doing was really the customer. He bought a bunch a new parts, slapped it together himself to save money but had no idea how, and no tools to check clearances. Then came to you with his tail between his legs with a story to cover his embarrassment.
When you think of how much money the customer would have paid for the original work, for it to be a complete mess. I hope nobody else gets stung by him
I hate to say it, but I wouldn't have assumed the head was done right either. If the bottom end was done badly. The top end was also gonna be done badly. Lesson learnt I guess. A lot of people are just lazy and can't be bothered doing it right. Sadly.
You should tell people that XF is your initials in make up a really cool back story for yourself. Your name is Xavier Farruccio of the famous Farruccio crime family from Chicago. You got in some trouble with the FBI after the disappearance of Tony the Hands. Rumour is that Tony the hands put his hands on your wife and you made him disappear. John Lawlor from the FBI know is it with you. But he hates Tony the Hands because Tony the hands also put his hands on John's former partner Sarah. Sarah took it hard in quick the bureau. So now John is left in a clash of conscience because on one hand with the disappearance of Tony the hands Sarah may come back to the bureau and end his crushing loneliness (he hasn't had a partner since Sarah) but on the other hand how could you live with himself if he let you go? So you made a deal with John that you would move to Canada and go on the straight and narrow and never returned to Chicago in exchange you would avoid the death penalty over the disappearance of Tony the Hands. But you have heard than a gang of illegal street racers knows who you are in where you live and is coming for you so you need to build a superfast street racing car to be able to outrun them when they come for you.
Авто/Мото
redoing another mechanic's job takes twice as long, and there are these setbacks. for the next you already know, how much time and money it will consume!
replace the oil cooler/coolers or flush them extremely well, flush the turbochargers etc... any metal shavings that are sitting in the block/ oil passages. You are extremely intelligent and I am sure you have thought of this but it would be a shame if some bearing material ruined this motor too!
Maybe taking the head off again was a blessing in disguise?
The reason how I came to know your channel is your homemade e55 ASL
You have come a long way from having some one else order main bearing for the e55 engine that you were rebuilding on the earliest videos on the channel to doing everything on your own, thanks for taking the time documenting all these, they are if nothing a very good source of well documented and concise information.
Might want to take the head to get resurfaced to take out as much of the knock damage as possible, because it can create hotspots and more knock.
More knock = more damage, more damage = more knock.
he has a cnc , he is the machine shop unless he doesn't feel confident enough to attempt it
@@vijayvjn6874 yeah that's true
Knock, knock......who's there?
Pre detonation
That thing that holds the main bearing lower halves is called a " main bearing girdle "
Damn bro, I feel your frustration. Can't tell you how many times I've had to go behind another mechanic and fix every damn thing because they didn't have a clue about what they were doing. I usually now assume everything is bad until I check it lol. I'm so happy you got your business going and that you're doing well!
Man I love your work! I've been a subscriber for awhile now because of the ASL project. If I was in Canada I'd pay your shop a visit! Keep the videos coming!
When the world needs our man, he does the job very well!
I like your videos a lot, the contents are easy to learn and the builds and your work is awesome. Thanks man and Keep doing the good stuff.
Great video, looking forward to part 2!
Wait, if you do this measurement procedure to a mercedes engine, and the mercedes recommend to replace the bolt after using, that would be 2-3 sets of main cap bolt/rod bolt? Until you finally assembly the engine
Can never have enough skyline vids ;)
Nice progress on the ASL, the track testing video testing the new wing was cool.
always check that if head is off ... a little gasoline on a straight valve head and see if valves leak to the ex/in ports
I can't even comprehend how someone could have built that thing in such a way... Hopefully they are just some guy the owner knows and not an actual shop charging money!
In the previous video, he said that it was a professional rebuild shop, who they were declining to name. Not very professional....
I think I spotted remnants of plastigauge on the crank bearing surfaces. Also to get the longest life, and biggest HP number, balancing the rotating assembly as a whole is the key to success.
Arent you suppose to tilt the telescoping gauge, lock it and and when removing tilt it back to get the most accurate measurement ?
Yeh, pretty much
How do you know what orientation to put the cams when bolting them back to the head? Did you put the long block into TDC first?
Ollie Mitchell if it’s like my 4 cyl 16 valve, there’s an assembly position with all the pistons part way down the cylinders so you can fit the cams in any position, then time the cams to the assembly position.
Then you can set the exact cam timing with the adjustable pulleys.
Excellent explanation great videos
I am done rebuilding m272 r350. Trued to start but after 1min idle engine dies and there’s lots of vibrates before engine dies. Check engine light shows random /multiple cylinder misfires. P0300. Any ideas or has anyone experienced that?
Another great vid 👌👍
In Malaysia after we overhaul we say to customer to do not pass 3000 to 3500rpm until first 5000km(mileage)...after pass 5000km need to oil change after that customer just need regular oil change...
Out of interest why did you leave the water pump on during the rebuild? Having found out all the faults, I would have started from scratch by disassembling everything and not rely on the previous. Nice video tho, hopefully it will produce decent power. 🤞👍🏻
Just do i 5 angle valve job and have the valves ground. Had a rb25 and had to rebuild the head.
bad news for you
good news for us
more videos yeah !!!
great job !!!
Never trust what the customer tells you, even new parts can be faulty
yes the parts can be but leaking like that and almost all of them means its just a bad job
Well it wasn't the customer, it was the mechanic that worked on it previously and messed everything up
@@azargelin Right, but in this case you cannot trust the customer because they cannot accurately tell you how good the job was done. Yes it was the mechanics fault, but you're not talking with the mechanic.
@@FrenchValleyAirport oh yea in the sense that everything is wrong until u prove it right
Hey XF, I mostly enjoy your videos with education character. Can you hit us with some good sources related to automotive engineering (preferably electronics and engine management)? THANKS
Running tight main bearing clearances requires a rigid block (mostly meaning the "crank line" has to be well supported) and crankshaft that doesn't bend too much when revving higher that causes the crank to bend and twist surprisingly a lot.. sort of a problem for straight six engines when going to very rpm's (piston speeds).
You'd better not run very thick oils with tight bearing clearances, like 20W50 or 10W60.
More like 5W30 or 5W40, depending how high oil temperatures are reached (track days etc) and what clearances you are using.
I wouldn't really like an idea of using e.g 0.04mm clearances with bearings, and running the engine with thicker than 10W40... but that's just my opinion! I bet someone will say the opposite tho, but I have my reasons for that.
Hadn't the valve seats been machined when the engine was rebuilt previously?
RB cranks are known to flex a lot and due to the front diff being bolted to the block it flexes the block as well
Why dont you just micrometer each piston then zero the bore gauge against the reading ? And why dont you measure the bearing tunnel without bearings installed?
those clearances from the old crank, lol
Take the thingy and put it on the doohickey, then attach the thingamajig and tighten the doodads to oem spec.
Can you do an SR20DET ? Thanksss
I can't believe he just put a new crank fresh out of box into a block without balancing it ..man the whole rotating assembly is new..It's crucial for the longevity of engine to balance a new setup.. especially if your going for big horsepower numbers ..And I don't think the crank is rotating so smoothly .It does look like he exert much more pressure than required.. i don't think its binding, maybe not enough lube ...Any way big fan since old days..Keep up the good work
If the crank is already balanced out of the box, there's no need. This seems to be OEM Nissan crank, so I'd rely that it is balanced. Only benefit would be balancing the flywheel together with it, but even that is unnecessary, if the flywheel is already balanced alone, too. And factory made engines have cranks and flywheels separately balanced, and then just installed. The installation won't make them imbalanced.
Only thing I'd have done more than shown in this video is to match the conrod+piston weights as close each other as possible, as why would you not. The benefit once again will be quite small though, if the weights in a sold set have already been well balanced.
The crank seems to rotate just fine, a properly torqued in tolerances crank will have some resistance in its turning. It won't be turning like a wheel in the air.
yes but the crankshaft is balanced for stock use unless going light weight parts
And I'd even say that balancing the crank and flywheel together to form a single balanced unit is not that good idea, if your flywheel for some reason needs replacing, you will need to strip the whole engine and also balance crank again with the new flywheel. It is better practice for most applications to balance them separately, unless you are building some crazy racing engine. There maybe some engines that use imbalanced flywheels to counter vibrations, so some engines may differ.
I get the feeling you have a lot of experience building.. ahum.. watching others build engines.
in stock application's everything is balanced now if u use light weight components then yes u need to balance and usally they avoid using the flywheel unless alot of weight needs to come off so flywheel balancing is rare outside racing engines
My dad used to build his own race cars 40 years ago, the only precision tools he had were a beat up beam torque wrench and those plastic gauges.
He never blew engines, but was known for breaking axles.
Looks like this guy built the engine from a box of parts without checking anything before or after putting it together.
Am I mistaken or was that deck not resurfaced at all? Should be standard procedure to do at least a single pass on the fly cut even if it appears straight at a glance
Why you would surface cast iron block? Lol that is not aluminium, is very hard to warp the deck.
I wonder is that was the intended term for and engine when new. “Engine break-in” maybe it’s like engine breaking. Maybe that’s what the guys say when the on the dyno lol
Oh man. Bummer. Great lesson learned.
the copper oil doesn't trash the turbos
When breaking-in an engine literally breaks the engine
Bruh.mp3
That's one of the reason why I don't usually take half done jobs by other people. I tell customers to take it back to that person who did it cuz they would know what they fully did. Sometimes best to avoid than gambles
Dude... If you're gonna build performance engines, you gotta know what a main girdle is called. Your vids are great, and the ASL is super awesome, but you have to know what you're talking about when you're talking about it.
Did you check valve lash?
Indians don't care
I think he's as rough as the 1st guy that built it, did you see all the crap fall out of the head & into bores when he fitted the head, rough as guts you need a ring gap grinder not a bench grinder 🤷♂️🤷♂️
You didn’t balance the rods first? I’m shocked ❗️😂
They mention all the weights in the box. They're close enough to the stock weights so don't upset the crank balance too much
You think that in the mass engine production is there anyone weighing and balancing the connecting rods , pistons and the assembly of them? No.
That's a job done in very high rpm and hp custom built engines.
My experience in this matter says any new assembly is going to fit the tolerances
Did you change your channel name?
Also get a ring cutter that way you are much more precise and accurate.
Did you change the channel name ?
plasti strip for measuring bearing clearance better
On this engine is getting the rotating assembly balanced a requirement?
No, if everything is balanced separately and correctly. There's just that "if" - do you trust the parts supplier. Of course for high output (racing) engine, it is a good idea to balance and weight match everything to as high degree as possible.
@@akkual does the engine being inline buy you any more wiggle room in the tolerances?
Dont forget to check your crank thrust...
Turbo m104 someday?
Never enough time to do it right the first time..... always enough time to do it over 😂
electrician (not cars) here. two things i find myself repeating VERY often when faced with someone else's fuc.... i mean.. work: "Really??!!" and "you gotta be shitting me!!". so i understand your frustration.
You never ever get the same reading twice using telescopic gauges, inside micrometer & dial bore gauge is the method used by professionals. Those bores look f@#ked were they torque plate honed?
I like the new name of the channel, can somebody tell me what the old name supposed to mean?
We will never find out...
If you didn't build it, you have to assume everything is bad 😥😥😥
Two things. Never trust if anyone says yeah that's taken care by the previous shop. Have seen that go wrong. Never store a crank horizontal.
I really can't understand why you were surprised that the head was badly machined by the "wheelbarrow mechanic" that previously built this engine 🤔
Good meticulous work on checking the clearances but I was disappointed to see traces of plastigauge left on the crank.
would have been so easy to flip head up and pour some gas on to valves to check seats
Yeh we did that test. Nothing leaked. It only leaked under pressure.
How do you pour a gas?
Any gas heavier than the atmosphere it is in will pour
👍🏻👍🏻👍🏻
I really like how you censored F..k
So the original head was stock valves just new seats?
I can't see how you can mess that up. The pitting on the valve seats looks like he's pulled rusty old valves out from under the bench!
Unless to save money he ground the seats with a die grinder.
Or just left schmutz in the engine so as soon as it made compression it destroyed the seats.
Incorrect clearances I can get. Measuring is technical and if you don't do it much its very time consuming. Even the crank I can understand if he has spun it up on a lathe and used emery tape to polish the journals and been too aggressive.
But how do you ruin valve seats? You put the head in the thing, dial up the size and angle and the machine does it for you! You don’t even need to polish them if you don't want.
No idea. We are thinking of doing a video taking the car back to him for an oil change or something after its fixed. But pretty sure he won't let us
I think XF can save 2020
Cant believe the block was not re honed....
I bet you that this "previous mechanic" that had no idea what they were doing was really the customer. He bought a bunch a new parts, slapped it together himself to save money but had no idea how, and no tools to check clearances. Then came to you with his tail between his legs with a story to cover his embarrassment.
at least you didn't get it in the car before you figured it out.
Sounds like my luck when I purchased my Porsche 911
Hey boss can i come learn from you. Take me as your student.
Hi
When you think of how much money the customer would have paid for the original work, for it to be a complete mess. I hope nobody else gets stung by him
Assumption is the mother of all F ups
NO Valve clearances were set in this video!
Hydraulic lifters, no need.
Thewatcher1950 thanks for that. Genuinely learnt something
You should consider saying who this hack was so that others don't get burned by him.
If everything was this bad from the start. You should always check everything. Never trust the last techs repair.
Brand new genuine heads are cheap from nissan
Cringe on the bench grinder for filing the rings...
I hate to say it, but I wouldn't have assumed the head was done right either. If the bottom end was done badly. The top end was also gonna be done badly. Lesson learnt I guess. A lot of people are just lazy and can't be bothered doing it right. Sadly.
Press F for this poor I6 engine, massacred like that should be criminal lmao
Yeah, "400 f***** kilometers before" but not for an engineer, job was done by pretty "first-timer" mechanic...
Somebody GoFundMe the poor owner for a new civic, this car of his is cursed
Girdle Girdle Girdle! FFS
Trust but always VERIFY! Sorry man at least you got good content :)
Unbelievable. No respect for other peoples time and money. Good luck on the dyno with the "new" engine.
Firstttttt!!
Watch this motor blow in 150km
why?
You should tell people that XF is your initials in make up a really cool back story for yourself. Your name is Xavier Farruccio of the famous Farruccio crime family from Chicago.
You got in some trouble with the FBI after the disappearance of Tony the Hands. Rumour is that Tony the hands put his hands on your wife and you made him disappear. John Lawlor from the FBI know is it with you. But he hates Tony the Hands because Tony the hands also put his hands on John's former partner Sarah. Sarah took it hard in quick the bureau. So now John is left in a clash of conscience because on one hand with the disappearance of Tony the hands Sarah may come back to the bureau and end his crushing loneliness (he hasn't had a partner since Sarah) but on the other hand how could you live with himself if he let you go? So you made a deal with John that you would move to Canada and go on the straight and narrow and never returned to Chicago in exchange you would avoid the death penalty over the disappearance of Tony the Hands. But you have heard than a gang of illegal street racers knows who you are in where you live and is coming for you so you need to build a superfast street racing car to be able to outrun them when they come for you.
The previous engine builder must be a very bad builder