Quote:
Originally Posted by Chrisyphus
It all boils down to two things: insufficient oil flow overall, and far too tight of clearances overall, but especially in the #1 main because the #1 main bearing grows by ~ .0004" when the harmonic balancer bolts are torqued to spec, and unlike the S62, BMW did not build in any addtional clearance from the factory to account for this.
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This is the gold right here. I was going to ask why the main bearing 1 was always failing, thank you for the logical explanation.
Rubin