header gaskets
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header gaskets

  1. #1
    I'm No Expert Shaun's Avatar
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    Default header gaskets

    ok what are you using, i bought the fel pro marine gaskets and on the #2 cyl i can see where i blew the gasket out. Is this normal? I can also see other areas where the exhaust is getting by on other cylinders. They are not sealing very well. I'm sure the header flang is probably alittle warped, they headers are 15+ years old.

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    It's what we do BDMarine's Avatar
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    Chevy, Ford, Olds ????? Headers or logs? If logs and they are very old they probably could have lost their heat treat at the flange and are warped.
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    Senior Member wajetboy's Avatar
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    im using rimflex gaskets they are a crush style, i have never had a leak with them.
    1978 Southwind Tunnel Dragster/1980 SWTD center steer

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    Senior Member XClutchboy725's Avatar
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    J&M Speed Center in Riverside had "Bison" header gaskets years ago. I've had them on my boat for years with no issues.

    I can't find much about "Bison" on the internet though...

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    gn7
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    Cantard 71hallett's Avatar
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    Quote Originally Posted by gn7 View Post
    just one word COMETIC
    x2
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

  9. #7
    058
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    I don't use gaskets....not needed if the surfaces are flat.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Chevy header gaskets were too small to mate properly to my Lightnings. Blew right arround the ring on at least 5 cylinders.

    Red RTV, let set up about a week, and installed. Works perfectly.
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    Senior Member H20MOFO's Avatar
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    Like 058 said where you can see it blowin, is a low spot.,
    Another Hot Boat refugee

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    Member Speed565's Avatar
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    The surfaces must be flat.
    On 'open' motors use RTV.
    Enclosed motors I still use a gasket.

  13. #11
    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by SmokinLowriderSS View Post
    Chevy header gaskets were too small to mate properly to my Lightnings. Blew right arround the ring on at least 5 cylinders.

    Red RTV, let set up about a week, and installed. Works perfectly.
    RTV high temp, I now use black, looks better. Never have had a leak in over 15 yrs. of not using gaskets. I have never worried about it setting up for any more than a few hours. It even handles the Nitrous passes just fine.

    Also don't know how much it helps, but I use studs and brass nuts on the exhaust. They don't back off.

    Sleeper CP
    Last edited by Sleeper CP; 06-19-2008 at 12:17 AM.

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  14. #12
    I'm No Expert Shaun's Avatar
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    They are basset OT headers on a BBC.

    Cometic makes header gaskets? Didnt know that.

    I'm sure the header flange is warped, these headers are 15+ years old.

    Didnt know RTV works for exhaust, seams like the high temps would kill it.

  15. #13
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    Quote Originally Posted by Shaun View Post
    Didnt know RTV works for exhaust, seams like the high temps would kill it.
    Permatex "Ultra Black" Hi-Temp silicone gasket maker.

    Sleeper CP

  16. #14
    21 Daytona Outlaw's Avatar
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    Quote Originally Posted by Shaun View Post
    They are basset OT headers on a BBC.

    Cometic makes header gaskets? Didnt know that.

    I'm sure the header flange is warped, these headers are 15+ years old.

    Didnt know RTV works for exhaust, seams like the high temps would kill it.

    if they are warped you might want to have them surfaced

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