Thread: rear seal leak?
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	10-22-2010 09:07 PM #1rear seal leak?
 
 I bulit a 427, 454 block 3.76 crank 2 piece seal with rtv on the cap corners for my 65 pick-up. broke it in with break in oil no leaks. drained it and put in synthetic for flat lifters. now after running a little i have a very small drip on the bottom of the bellhousing. you think going back to reguler oil and running it somemore or just open it up and put a new seal in?
 
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	10-23-2010 05:45 AM #2
 nope synthetic will make leaks. any thing with not the best for sealing gets worse. try going back to reg oil .it could not be the seal so much it is the crank finsh on the crank . you could pull the seal and try a flouroelastomer seal .but i would never run full synthetic in a older bbc for street useIrish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip 
 
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	10-23-2010 06:38 AM #3
 X 2 what Pat saidWhen I get to where I was goin, I forgot why I went there>   
 






 
		
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I'm happy to see it back up, sure hope it lasts.
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