Scored Main Cap Bearing - Ouch

Marcohotrod said

oil holes are chamfered. and oil to #5 is back from the filter directly, 1-4 goes a different path. did junk in the pump go thru a cheap filter?

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Put a 1/8 rod down through the oil pressure sending unit hole on top the rear of the block. If it falls straight through the block (with the rear main cap off) the 9/16 plug was never installed. If you fail to install this plug oil isn’t diverted to the oil filter.