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Read the WELCOME ALL BMWFANATICS post.
M3 E90'2'3 Rod Bearing Problems And Cost
- Thread starter Revs
- Start date
individj
Well-known member
Yes & no..they are coating the OEM bearing BUT apparently the bearing is different to the original bearing used! the new OEM bearing has more clearance.
i also find this to be 1 of the most informative posts about the matter.
http://www.m3post.com/forums/showthread.php?t=892838
i also find this to be 1 of the most informative posts about the matter.
http://www.m3post.com/forums/showthread.php?t=892838
The new bearings do not have lead in their construction.
As to the clearance I am not sure whether a bigger clearance will really aid in their longevity as the car I replaced bearings on was at maximum clearance which in itself proves that clearances alone provided they are within manufacturers specs are not the main driving cause for the failures.
From all that I have read and discussed with people it appears (not a statement of fact but rather theory and speculation) that a major contributing factor is the width of the bearing which in the case of these engines it is too narrow by the standards that engineers use.
As to the clearance I am not sure whether a bigger clearance will really aid in their longevity as the car I replaced bearings on was at maximum clearance which in itself proves that clearances alone provided they are within manufacturers specs are not the main driving cause for the failures.
From all that I have read and discussed with people it appears (not a statement of fact but rather theory and speculation) that a major contributing factor is the width of the bearing which in the case of these engines it is too narrow by the standards that engineers use.
splintheter
///Member
I honestly believe you can get information until you are blue in the face but it won't tell you if bearings need replacing. my car was treated like a queen by both me and the previous owner, and as you have seen the bearings were toast. Whereas a friend of mine has an e92 with 117k on the clock, and has no idea of previous history. He just says a prayer before he fires her up (he is doing bearings next week)Revs said:
There is no escaping the fact, if you want peace of mind, do the bearings.
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AdiS
Well-known member
Rod bearing replacement is not the kind of job BMW would typically do on Motorplan. What is more likely is that if the bearings go while the car is under plan, then BMW would replace the engine. It's also not really the thing that most owners would do out of plan, Becuase most people are not aware of the risk. So unless you buy from an informed enthusiast, assume they have not been done.
Mohamaxx said:
Basically if you gonna keep the car book the 1st of June 2017 in your diary as bearing change day. If it runs bearings before then, BMW will replace your motor, but if it doesn't and you get to the 1st of June, you going to be worried every time you take your car for a drive out of m/plan.
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