Leaky Header Gasket

Discussion in '40- & 55-Series Tech' started by OldNum7, May 7, 2003.

  1. OldNum7


    Likes Received:
    May 7, 2003
    I have '77F J40 with headers on it (4 to 1)but I keep getting a leaky manifold gasket. Is there something I can do to solve this? How about those kevlar gaskets from SOR? Im thinking of getting a different set of headers. Any suggestions?
  2. SpaceGhost


    Likes Received:
    Feb 1, 2002
    Indianapolis, Indiana
    Take a good look at the flange thickness of the header. Compare that to the intake manifold at the stud/bolt mount ears. Some aftermarket headers are thinner and will NEVER seal properly.

    I have been using SOR's kevlar gaskets for years. I like em, some don't. Double them up and you'll get better results. Many use copper header/manifold sealer. Similar to gasket maker (silicone) but with high heat copper content.

    If you decide to replace the header, be sure to consider the SOR 2 piece unit. They have a bolt on exhaust system that mates to it. I am not affiliated with anybody, hehehehe, just happen to like that header.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.