exhaust leak
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5.0 and 5.7 Discussion, exhaust leak in Cadillac Engine Technical Discussion; Hey Folks Another dumb question. When you install exhaust manifolds on a 87 Olds 307.......do you use gaskets at the ...
  1. #1
    johndfw's Avatar
    johndfw is offline Cadillac Owners Fanatic
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    exhaust leak

    Hey Folks

    Another dumb question.
    When you install exhaust manifolds on a 87 Olds 307.......do you use gaskets at the head?......

    I was told by a mechanic that it should be metal to metal......no gasket.

    That doesnt sound right to me

    Any thoughts?

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  3. #2
    guidematic's Avatar
    guidematic is offline Cadillac Owners Fanatic
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    Re: exhaust leak

    Yep, he's right. Just make sure the surfaces are clean and straight. You are best to coat them with anti seize as well as the bolts.

    Mike

  4. #3
    johndfw's Avatar
    johndfw is offline Cadillac Owners Fanatic
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    Re: exhaust leak

    Thanks Mike
    I guess Ill end up taking them off. The heads were off just before I bought it, and they put the manifolds back with exhast gaskets.
    Nuts!
    Thanks again

  5. #4
    priscillabrougham is offline Cadillac Owners Member
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    Re: exhaust leak

    Did installing the exhaust manifold without the gasket work? I have an 88 Brougham that I can't get to stop leaking from the drivers side.

    I'm afraid the remanufactured head I put on about 3000 miles ago is not true at the manifold; I have burned through three gaskets. I've tried copper spray, red sealant, you name it. Then again, if a gasket isn't required, then no wonder I've burned through them. I put one on the pass side and it doesn't leak.

    I'm hoping it doesn't need the gasket; it'd save me a heck of a lot of work! Please let me know; thanks!

  6. #5
    VortecCaddy is offline Cadillac Owners Member
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    Re: exhaust leak

    Several gasket companies make "dead soft" aluminum or copper manifold gaskets, Around $20-$30. They work wonders on surfaces that are not quite perfect.

  7. #6
    priscillabrougham is offline Cadillac Owners Member
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    Re: exhaust leak

    Great; I'll give one of these "Dead soft" gaskets a shot. I tried it without an exhaust manifold gasket and she still leaks.

  8. #7
    VortecCaddy is offline Cadillac Owners Member
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    Re: exhaust leak

    You will be happy that you did.

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