Quote:
Originally Posted by JLMounce
The engine is a 73 455. Pan appears to be a factory pan.
Are you talking about what's pictured here?
This is precisely where my drip is coming from.
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yes, thats the 3 hole pan.. very easy to roll the thin bead in the rubber seal & even if it doesnt roll or move its a weak seal. what rear main seal do you have, if its the BOP & your engine builder is familiar with installing them & knows to check the crank surface, chances are its not the source of the leak.
i just went through this with a milodon 7qt pan that uses that same seal, didnt leak quite as bad as yours but i thought it was a rear main. after replacing the the pan gasket & rear main (BOP) it still leaked, after talking with a couple pontiac guys, the fix was to use the 1/4" thick cork gasket in place of the rubber U seal with a good gasket sealer/RTV. been 6+ years on a 500+hp stroker motor & its still dry.
i'd start there if you confirm no other source up higher that could cause that big of a puddle. sounds like you verified it was coming directly from that area, after wiping it dry & running for a few minutes then let sit overnight, you should be able to see fresh oil, if its dry above that U seal its not from higher up on the block. also be sure you have the metal load spreaders for the corner pan bolts. another gasket option is the one piece BOP that gets great reviews.
good luck finding the leak, i hated dealing with mine for a couple weaks... i pulled the engine each time to replace the pan gasket, but when its that fresh of an install, it came out quick & easy.