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Old 11-03-2024, 02:25 AM   #23
Smallblock454
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Join Date: Jun 2014
Location: LB, Germany
Posts: 1,507
Quote:
Originally Posted by Homeoboxter View Post
What I don't understand is, how can the debris get through the filter?
That is pretty easy to answer. The oil filter has a valve / bypass. The valve is actuated by a spring. If the oil pressure is too high – especially when the oil is cold – the bypass opens and unfiltered oil runs through the engine. Sometimes these springs also get old. And in the 9x6 oil system the spring loaded bypass is not part of the oil filter itself, but of the oil filter housing - so potentially never gets replaced.

The rod bearing wear doesn't look evenly to me. That should be investigated further.
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