I have a new 340 motor that I had the shortblock built and cant get rid of an oil leak at the rear. After changing the pan gasket several times I am confident it is not leaking and decided to go in and replace the rear seal. When I pulled the rear main cap this is what I found. Motor has less than 500 miles and good oil pressure. I have no idea what could cause this except some debris left in the engine after build. Now what?
Thanks FABO
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