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Exhaust Manifold Flange Gasket

Discussion in 'Early CJ5 and CJ6 Tech' started by Howard Eisenhauer, Jul 5, 2017.

  1. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    I'm blowing these things out like crazy :(

    I think the issue is that I had a stainless exhaust system installed & I think that it vibrates more than muffler molly would. Anyhow something is doing a job on the gaskets .

    Any recommendations for a "problem solver" gasket?

    Thanks,

    H.
     
  2. Daryl

    Daryl Sponsor

    I have had the same issue a couple times lately. Not sure why.
     
  3. Glenn

    Glenn Kinda grumpy old man Staff Member

    Is it randomly blowing out or is it by chance leaking at the firewall side?
     
  4. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Blowing out on both sides, top & bottom, right in the middle toward the fender & the block.
     
  5. Glenn

    Glenn Kinda grumpy old man Staff Member

    I'll bet it's the material they're made from then.
     
  6. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Doesn't seem to make a difference what style- asbestos(?) covered tin or the ones with the metal ring in the middle both go bad.

    [​IMG]or [​IMG]
     
  7. Glenn

    Glenn Kinda grumpy old man Staff Member

    Is the exhaust pipe flange welded on so that a little bit of the pipe goes up in the manifold?
     
  8. Vanguard

    Vanguard Take Off! Staff Member

    What do you have for exhaust hangers? Is there rubber in it? Stock locations?
     
  9. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Stock style exhaust except in stainless. The clamp snugs the pipe up nice & tight to the manifold & there's no movement at all at the muffler end.
     
  10. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    No, the pipe is flared nice & wide to butt against the gasket/manifold & the clamp is loose.
     
  11. fhoehle

    fhoehle Sponsor

    I'd weld a ring in the exhaust so it just goes up past the gasket, keeping the highest heat directly off the gasket.
     
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

  13. Glenn

    Glenn Kinda grumpy old man Staff Member

    I't hard to keep it from leaking without the part extending into the manifold.....or should I say almost impossible to keep from leaking?
     
  14. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

  15. ronnie victor

    ronnie victor Member

    I used two gaskets. Made a tighter seal compared to using only one.
     
  16. 1960willyscj5

    1960willyscj5 Well-Known Member

    So, after reading all the way through this thread, I have to assume that you all are talking about the lower manifold to exhaust pipe gasket, and not the manifold to block gaskets. Which are what came to mind first when I started reading this.
     
  17. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member


    yup.


    I thought the implication was clear.


    I guess it wasn't.:(


    Sorry, won't happen again.















    I promise.























    :susp:
     
  18. Glenn

    Glenn Kinda grumpy old man Staff Member

    I think he missed the flange part. :)
     
  19. Keys5a

    Keys5a Sponsor

    I looked at the remains of an (original ?) j-bend pipe where it connects to the manifold flange from an M38A-1. It has almost 3/8" of pipe that extends above the flange and gasket, aligning up into the manifold.
    In post 11, fhoehle suggested welding a ring to the top your pipe that would essentially duplicate how my old rusty pipe is.
    -Donny
     
  20. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    As my pipe is actually flared that won't work- I'm thinking welding in a shot section of pipe into the flared bell if I can find something that won't rust away to nothing in a year or two.