Fordkoppie
///Member
Well it can barely manage half of the ///M's 8400rpm.
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Read the WELCOME ALL BMWFANATICS post.
Bearing Failure (pics)..... Opinions wanted.
- Thread starter QikNish
- Start date
444YYY
Honorary ///Member
Guys, first and foremost, my heart goes out to any owner, M engine or no that has had a bearing failure.
Now with that out the way, I'd like the guys who have had a bearing failure, and who had the car for many kilometers to step forward and explain what they think caused the failure!
- I wanna hear stories like, I revved the crap out of the car from cold
- I ran the car, didn't check the oil level, and that's how the bearing failed....
- I didn't think expensive oil was necessary
- I didn't change the oil etc etc
- I over revved it
- I mis shifted
- I moved the rev limiter to 9800 rpm
- I revved it in neutral at the limiter, till the crowd started whistling
- I didn't many doughnuts with my car
- I was practicing spinning...
I'm pretty sure in most cases (up to 90%) at least one of the above was was the cause of the bearing failure....
Yes the list above is not complete, but I'd like to believe that these cars are not ticking time bombs and can last a long time treated properly!!!
Now with that out the way, I'd like the guys who have had a bearing failure, and who had the car for many kilometers to step forward and explain what they think caused the failure!
- I wanna hear stories like, I revved the crap out of the car from cold
- I ran the car, didn't check the oil level, and that's how the bearing failed....
- I didn't think expensive oil was necessary
- I didn't change the oil etc etc
- I over revved it
- I mis shifted
- I moved the rev limiter to 9800 rpm
- I revved it in neutral at the limiter, till the crowd started whistling
- I didn't many doughnuts with my car
- I was practicing spinning...
I'm pretty sure in most cases (up to 90%) at least one of the above was was the cause of the bearing failure....
Yes the list above is not complete, but I'd like to believe that these cars are not ticking time bombs and can last a long time treated properly!!!
Pho3niX90
///Member
444yyy you would be surprised. All cars have been over revd, if you say your car hasn't then you are in denial. My car has seen limiter 300 times for example, I know this because the car stores this in the computer with a nice little clock to say how long in total it stayed there. Nice trick ratslaaf showed me.
So in a nutshell its a MUST for any M owner to do the bearings, if they can't afford it or didn't take it into consideration then they shouldn't own one.
So in a nutshell its a MUST for any M owner to do the bearings, if they can't afford it or didn't take it into consideration then they shouldn't own one.
Crash_Nemesis
///Member
Mechanical over rev (the correct term for when you shift into 3rd from 4th whilst you meant to go to 5th, forcing the car to rev to over 10 000rpm) will more than likely have you bend valves (and or have those valves "float" and smack a piston, causing a dropped valve, that will most likely put a hole in your piston) than run a bearing. PS. It is also known as the money shift, mostly because it costs you money to rebuild.
Nikhil
Honorary ///Member
Well bearing failure seems to happen to dct and smg models i dont think those gearboxs will allow the car to exceed the rev limiter, where as with a manual its more than likely :rollsmile: but im sure most failures are due to flooring it while cold or incorrect oil or levels.444YYY said:
444YYY said:
I think most of it relates to oil:
- not checking oil
- the car not warning you about low oil
- incorrect oil grades being used
The theory is that with insufficient oil supply at high revs the bearing goes pop. Similarly, the oil gets too viscous at high temps, and again improper lubrication is delivered and the bearing goes pop again.
As with any ///M car, if you aren't checking the oil and water levels before you start it up, you're doing it wrong...
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Pho3niX90
///Member
Checking the oil before you start is not possible. The car has an electronic "dipstick" that only reads the oil level once the car is at operating temps and on level ground.
There are many speculations on the usa forums and m5boards, but has come down to the clearances and thick oil being the main cause. Most people also buy these cars as weekend toys so that 60K km is hard KMs.
There are many speculations on the usa forums and m5boards, but has come down to the clearances and thick oil being the main cause. Most people also buy these cars as weekend toys so that 60K km is hard KMs.
Xack said:
Isn't oil level sensor failure a thing on these cars?
Either way, doesn't eliminate 'low oil' being a culprit here. BMW was just stupid for trying to be 'innovative' and doing away with the manual dipstick... :fishwack:
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