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      03-10-2026, 04:04 PM   #30
DrFerry
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Drives: 2008 E92 M3
Join Date: Jul 2010
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Quote:
Originally Posted by Partee Racing LLC View Post
Just to be super clear: This is all open for serious debate and analysis. As engine builders, however, we have to be prophylactic and risk-averse. So when we see nearly 100% of the blown S65s coming our way with rod bearings with greater than stock clearance, we feel compelled to address it as we have. Just wanted to share that with the group. Do with it as you please!

--Peter
Could there be a different reason why nearly 100% of the blown S65s coming your way - with rod bearings greater than stock clearance - are blowing up? In other words correlation is not necessarily causation. Example: stock engines with stock OEM bearing clearances also blow up - and most S65 engines have already had the rod bearings replaced with a well known solution i.e. extra clearance bearings which increases the probability that the population of engines you receive will have extra clearance bearings.
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