Quote:
Originally Posted by robthewrench
You really can't do anything preventative. A rear main seal should last over 100K miles. There are at least two things that can result in it dying early:
1) Bad initial install. Nicking the seal, not getting it seated completely, etc... will result in an early failure. You didn't say how many miles on your 2010, but this would be my best guess.
2) Lots of high heat cycles, typical of track racing. That seal is made of rubber and rubber does not like a lot of high heat cycles. The 335 isn't a cool running engine with those turbos (hence the need for an oil cooler). So the rear main seal on the N54 / N55 engine is probably more likely to fail than a non-turbo engine.
But not a whole lot that you can do....
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74k on chassis. 2k on motor as it's new.
I was hoping aftermarket had a better gasket but I guess not
