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 Post subject: SBC REAR MAIN SEAL ???'S
 Post Posted: Wed Aug 03, 2011 6:04 pm 
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I will be installing a rear main seal in my SBC 400 engine,I have seen it getting removed and think I can remove it but how do you install it in the engine and any pics of which way the seal goes in?THANKS


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 Post Posted: Mon Aug 08, 2011 1:49 pm 
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The seal goes in with the lip to the front of the engine. You want it to look like stuff can get in the engine, but if the oil tries to get out, it will push the seal tighter to the crank.

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 Post Posted: Tue Aug 09, 2011 5:09 pm 
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OK I got the rear main seal in the shortblock is there anyway I can see if it will leak with just the shortblock assembled or do I have to assemble the whole engine and crank it on the engine stand?THANKS


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 Post Posted: Thu Aug 11, 2011 8:43 pm 
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There is really no way of knowing whether it will leak or not until you have the engine running. If the crank surface where it's touchign isn't grooved and the seal is installed correctly it should not leak. Everyone has their tricks for installing it (offsetting the parting line, putting a tiny dab of RTV on the ends that touch, etc.).

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 Post Posted: Fri Aug 12, 2011 6:14 pm 
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X2 on the Tips^^. + lube the Seal Lip.
Also there are RM Seals for the 400 that relocate the seal Lip for a grooved Crank and Seals for Mains that have been Line Bored/Honed.


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 Post Posted: Tue Sep 13, 2011 4:22 pm 
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I replaced the rear main seal with a FelPro#2909 which I had to like force it in, but got it in,assembled the engine and it still LEAKS when the egine is not running any HELP PLEASE.


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