Re: New crate motor leaking get rear main seal
Two other things to consider:
1) Did you happen to check to see if your valve covers were leaking? When the rear of the valve covers leak, the oil runs down by the rear main seal, and can make it look like the rear main is leaking. Stamped steel SBC valve covers are notorious for leaking.
2) Are you sure it is engine oil that is leaking and not ATF? If your auto tranny pump is leaking, it can also make it look like the rear main is leaking (I see an auto tranny flex plate in your picture).
Just some thoughts from my personal experiences tracking down leaks.
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