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      11-10-2025, 05:35 PM   #33
former 240 s14
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Drives: 2008 E92 S65 Track Rat
Join Date: Jan 2007
Location: Cincinnati Ohio

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Quote:
Originally Posted by spammysammich View Post
Do you happen to know if the most recent build started with a known good block that had no cracking at the #1 main bearing journal? There have been several reported cases of cracks propagating up to the oil galley. It is conceivable that a rebuilt block may have been cracked to begin with, leading to reduced flow to main 1 and the 1/5 rods.
Should of mentioned this above, apologies. Engine core was a good one with 60k miles. New OEM Main's were installed when the rebuild happened 14k miles ago.

I am going to be talking with the engine builder about machining extra clearance the top bearing in Main Cap 1. This is recommended by a good engine builder in England. See video above from Dr. Ferry!

Thanks for the feedback!

Rubin
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