Join Date: Jul 2000
Location: southern new jersey
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Re: Sealing headers to block with RTV?
You shouldnt have to seal them with silocone. Make sure your headers are good first off. So headers have that lip around the tube and if that is rusted off a little they will not seal. I forget the name of the gasket company, but they make a really thick spongy feeling header gasket that has sealed every one i have put on as long as the header was good. I have also used with good results manifold gaskets that have the metal on the one side and the paper on the other. No matter what, the headers will leak again. They all do, thats why you will never see headers on my CJ.