I love this honest video. Most youtubers only show when the going is good, but the reality of life is ups and downs. Chin up and keep up the hard work!
Good video and good to see you go through the root cause and issue. Sorry to hear it didn’t work out with the original engine, but good learning experience for next time.
Hi, like your vids watch them often, but have to disagree on this one, (don't buy flood damaged). I've recently rebuilt a 335d flood damaged, it was seized solid when I got it. Being a mechanic of almost 40 years,I completely stripped it to bare block & rebuilt from ground up including honing bores, all new bearings, six new rods, new piston rings stem seals, timing chains & guides etc. You would not believe where the water got (everywhere). But she's perfect now & saved over 10k on price of forecourt car. 👍
Hi, thanks for watching the video. You’ve done a hell of a job, congratulations! That’s the proper way to do it! Unfortunately with what I can afford to buy, mostly n47 engines, the profit margin is so small I can’t overhaul the whole engine. For me it’s cheaper to buy a donor car that later on provides me with more spare parts. All the best!
Cheers Pal, just so you know the parts cost was around £600,i sourced a full set of rods for £150,so not that expensive. I measured all the rods tolerances before fitting as they were used but perfect. I understand you will break the donar car and make money on the parts, I had to rebuild mine on the back street (but very understanding wife) allowed me to rebuild the engine in the kitchen 😊. Keep up the good work pal. 👍
Thanks for watching. Here’s what I think happened: the BMW low oil pressure light comes on at 0.3-0.5 bar. Since the main bearings are primarily responsible for creating oil pressure, and in my case, they were still there and not significantly worn, they managed to maintain 0.3 bar of pressure even though the conrod bearings were already severely worn or gone. It was a sad situation but I’ve learned the lesson. Water damage engines need to be disabled, new bottom end bearings conrod bearings, block properly cleaned.
that is one kick in the balls the work you put into that motor 👌👌👌👌👌👌👌but heads up you are stunning what you do great tallent great content you will win the battle good luck pal on the donor motor
Good video once again can you explain why the surface rust on the internals of the block would cause the damage that has happened I can't see the connection
Thanks! Since water got inside the engine, the cranckshaft bearings got pitted and scored, and surface rust/corrosion occurred. Bearing tolerances are very tight, 0.025-0.065mm, so every small imperfection will cause oil pressure loss. If oil pressure is lost, the bearings will spin.
Since the crankshaft is damaged, it’s not worth it, I’m not a big fan of oversized bearings and repaired crankshafts on n47/n57, also it’s not cost effective if you want to do it the right way. But now I have another n47 engine, with an accident damaged cracked block, internals all good. I’ll make 1 good engine out of the two. All the best
@@GeorgeAusters The water damage will have permeated the oilways as well so you are just kicking the can down the road. Unless the block is completely stripped, properly flushed and all galleries brushed you are always taking a chance. All that work makes it not cost effective. So possible yes, but practical no.
what was wrong with donor car so it worth swap engines and not keep donor car as main? :) thanks for videos! what happen to you is my worst nightmare N43
Thanks for watching. Donor car is a cat S f20 from 2013. Your assumption is correct, just for the engine swap it’s not worth it, but I can fix another car or two from the good body panels left.😊
Crankshaft was spot on, but bearings-I was too optimistic. That's on me. However, by the second time I opened the engine, there was way more rust inside. Additionally, the oil drops that fell on the ground had a strange reaction on the garage floor, like acid or saltwater. It’s worth mentioning this was a Stolen recovered/water flood car from copart. Thanks for watching.
Could be that rust around the oil sensor cause wrong reading and giving impression that pressure was ok? OR is it possible that pressure never dropped to low and the only reason of the damage is the rust in the first place?
@@MAXS200 Bmw low oil pressure warning is set to 0.3 bar which is very low. Since the main bearings were still relatively ok and main bearings are responsible for oil pressure in the first place the pressure was still above 0.3
Yes, 100% - whenever dealing with water-flooded engines, I always remove the crankshaft now. Small rust spots can develop on the upper side of the cranckshaft where the oil holes are, especially if oil and water have mixed and the engine has sat for a long time. The crankshaft needs to be inspected and polished if necessary, new main and conrod bearings are installed, the oil pump is taken apart, cleaned, and lubricated, and all oil passages are thoroughly cleaned. This method has proven reliable with zero issues so far, but it’s a lot of work. Just replacing the bent conrod it’s a risky investment, I’ve learned it the hard way
@@W15Garage Wooow thank you for your reply and shared knowledge! Amazing work you're doing on those engine, quick question: Wold you change the chain at a given mileage on an N47 engine or would you drive until the chain fail?
@@MAXS200 Nowadays it’s not that big of a deal to replace n47 chains, parts are available, probably not a bad idea to replace it. BUT if it brakes it’s not the end of the world, it can be fixed.
@@пппппп-ч1и7ю Great idea!!! I’m working on a setup as well for my x3 n57. I have the adapter that goes into the block ,now i need to buy the cabin pressure gauge. What oil pressure do you have at idle, fully warmed up, after 1 hour of driving?
I love this honest video. Most youtubers only show when the going is good, but the reality of life is ups and downs. Chin up and keep up the hard work!
Thank you, I really appreciate your comment
Good video and good to see you go through the root cause and issue. Sorry to hear it didn’t work out with the original engine, but good learning experience for next time.
Yes, we learn from mistakes. Thanks for watching.
Hi, like your vids watch them often, but have to disagree on this one, (don't buy flood damaged). I've recently rebuilt a 335d flood damaged, it was seized solid when I got it. Being a mechanic of almost 40 years,I completely stripped it to bare block & rebuilt from ground up including honing bores, all new bearings, six new rods, new piston rings stem seals, timing chains & guides etc. You would not believe where the water got (everywhere). But she's perfect now & saved over 10k on price of forecourt car. 👍
Hi, thanks for watching the video. You’ve done a hell of a job, congratulations! That’s the proper way to do it! Unfortunately with what I can afford to buy, mostly n47 engines, the profit margin is so small I can’t overhaul the whole engine. For me it’s cheaper to buy a donor car that later on provides me with more spare parts. All the best!
Cheers Pal, just so you know the parts cost was around £600,i sourced a full set of rods for £150,so not that expensive. I measured all the rods tolerances before fitting as they were used but perfect. I understand you will break the donar car and make money on the parts, I had to rebuild mine on the back street (but very understanding wife) allowed me to rebuild the engine in the kitchen 😊. Keep up the good work pal. 👍
You are so professional and I think this car is already fixed😬👍🏼
Appreciate your comment!Third time is the charm😃. Thanks for watching
So sorry for you, I also wonder why the oil warning didn't come on
Thanks for watching. Here’s what I think happened: the BMW low oil pressure light comes on at 0.3-0.5 bar. Since the main bearings are primarily responsible for creating oil pressure, and in my case, they were still there and not significantly worn, they managed to maintain 0.3 bar of pressure even though the conrod bearings were already severely worn or gone.
It was a sad situation but I’ve learned the lesson. Water damage engines need to be disabled, new bottom end bearings conrod bearings, block properly cleaned.
that is one kick in the balls the work you put into that motor 👌👌👌👌👌👌👌but heads up you are stunning what you do great tallent great content you will win the battle good luck pal on the donor motor
Appreciate it, thank you! The donor engine seemed promising.
Good video once again can you explain why the surface rust on the internals of the block would cause the damage that has happened I can't see the connection
Thanks! Since water got inside the engine, the cranckshaft bearings got pitted and scored, and surface rust/corrosion occurred. Bearing tolerances are very tight, 0.025-0.065mm, so every small imperfection will cause oil pressure loss. If oil pressure is lost, the bearings will spin.
@@W15Garagethankyou for explaining
Can you not oversize pistons and rod bearings?
Since the crankshaft is damaged, it’s not worth it, I’m not a big fan of oversized bearings and repaired crankshafts on n47/n57, also it’s not cost effective if you want to do it the right way. But now I have another n47 engine, with an accident damaged cracked block, internals all good. I’ll make 1 good engine out of the two. All the best
@@W15Garage Only costs around £100 to grind a crank. I was just wondering if it was possible
@@GeorgeAusters The water damage will have permeated the oilways as well so you are just kicking the can down the road. Unless the block is completely stripped, properly flushed and all galleries brushed you are always taking a chance. All that work makes it not cost effective. So possible yes, but practical no.
what was wrong with donor car so it worth swap engines and not keep donor car as main? :) thanks for videos! what happen to you is my worst nightmare N43
Thanks for watching. Donor car is a cat S f20 from 2013. Your assumption is correct, just for the engine swap it’s not worth it, but I can fix another car or two from the good body panels left.😊
when you replaced the conrod originally, was there no signs of wear on the crankshaft journals or excessive wear on the bearings?
Crankshaft was spot on, but bearings-I was too optimistic. That's on me. However, by the second time I opened the engine, there was way more rust inside. Additionally, the oil drops that fell on the ground had a strange reaction on the garage floor, like acid or saltwater. It’s worth mentioning this was a Stolen recovered/water flood car from copart. Thanks for watching.
Could be that rust around the oil sensor cause wrong reading and giving impression that pressure was ok? OR is it possible that pressure never dropped to low and the only reason of the damage is the rust in the first place?
@@MAXS200 Bmw low oil pressure warning is set to 0.3 bar which is very low. Since the main bearings were still relatively ok and main bearings are responsible for oil pressure in the first place the pressure was still above 0.3
@@W15Garage Do you reckon then that the rust is the only culprit? Is it possible that rust only result in spun bearings?
Yes, 100% - whenever dealing with water-flooded engines, I always remove the crankshaft now. Small rust spots can develop on the upper side of the cranckshaft where the oil holes are, especially if oil and water have mixed and the engine has sat for a long time. The crankshaft needs to be inspected and polished if necessary, new main and conrod bearings are installed, the oil pump is taken apart, cleaned, and lubricated, and all oil passages are thoroughly cleaned. This method has proven reliable with zero issues so far, but it’s a lot of work. Just replacing the bent conrod it’s a risky investment, I’ve learned it the hard way
@@W15Garage Wooow thank you for your reply and shared knowledge! Amazing work you're doing on those engine, quick question: Wold you change the chain at a given mileage on an N47 engine or would you drive until the chain fail?
@@MAXS200 Nowadays it’s not that big of a deal to replace n47 chains, parts are available, probably not a bad idea to replace it. BUT if it brakes it’s not the end of the world, it can be fixed.
Jó munka 👍
Köszi
Depsite all those who moan about insurers writing off flooded cars, even those that don't seem to be too bad, this is the reason why.
Agreed! Thanks for watching
Я вывел масленный датчик в салон он показывает давление в реальном времяни
@@пппппп-ч1и7ю Great idea!!! I’m working on a setup as well for my x3 n57. I have the adapter that goes into the block ,now i need to buy the cabin pressure gauge.
What oil pressure do you have at idle, fully warmed up, after 1 hour of driving?
@@W15Garage холостой прогретый 1,1 при поднятии оборотов до 4,5. Тоже поставил через переходник, штатный наместе.
@@пппппп-ч1и7ю same here, 1.1 after fully warmed up
piece of dump all those newer cars bmw mercedes sadly too much plastics, poor engineering sad but true
No dipstick in these bmw's are really really bad idea
Thanks for watching! N47 does have the dipstick, but the absence of the low oil pressure light was strange, since all 4 conrod bearings were spun.