Exhaust Manifold Gasket Question
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Exhaust Manifold Gasket Question

  1. #1
    79 Sanger Picklefork Tittyman's Avatar
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    Default Exhaust Manifold Gasket Question

    My heads are BBC with round ports from the later 1970'S...the headers are round Bassett type. I have fel pro 1412 gaskets...it's time to replace because they are leaking again...should I replace them with the existing ones or use Edlebrock 7203..7205 or use some kind of RTV or what.these Fel Pro gaskets appear to be a little large for the header...I know it's kind of a dumb question but they keep leaking..seems like they only last a year or two at the most..thanks
    Last edited by Tittyman; 09-02-2013 at 06:11 PM.
    "Bill, if your gonna ride my ass that hard, at least you could pull my hair"....Hillary Clinton

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  3. #2
    79 Sanger Picklefork Tittyman's Avatar
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    Anybody...is there one exhaust manifold gasket far superior than the rest..thanks..Jess
    "Bill, if your gonna ride my ass that hard, at least you could pull my hair"....Hillary Clinton

  4. #3
    Senior Member jetjunky's Avatar
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    I've always had good luck the felpro's with my bassets, no silicone. I do check and tighten the header bolts regularly though as necessary. Do your header flanges have the raised weld bead that's been milled flat but raised above the 3/8" thick flange? I've always thought that helps to keep a tighter clamp on the gasket. I've read where people will try the 1/8" thick soft copper gaskets in an effort to combat similar situations as yours as well as gaskets with silicone or just silicone by itself. One thing I've found in the past on log manifolds when running just silicone is to apply a thick (1/4") bead to the manifold flange and let it set up for a while to skin over, then install the manifold but don't tighten up, just bring it down evenly till the silicone starts to spread out a bit on all ports then stop and let sit to cure and then tighten all bolts down and hope for the best. The BBO bolt pattern and log manifolds have to be the worst ones out there for sealing issues. Good luck, hope something of this helps.

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