RTV on exhaust manifolds?
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Joined: Jan 2007
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From: Higganum, CT
I'm replacing the exhaust on my 454s with stock Merc cast iron. New manifolds, spacers, and risers. Someone told me to use the copper ultra RTV, but I thought I heard or read that you're not supposed to. Any reasons not to smear some of the copper onto the flanges before putting the gaskets on? Thanks.




