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Exhaust Manifold...use gaskets or not?

Discussion in 'The Garage' started by 90blzr, Oct 10, 2003.

  1. 90blzr

    90blzr 1/2 ton status

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    You guys use gaskets on your exhaust manifolds? Getting ready to slap them back on a different block and dont want leaks. When I took them off the old block there were no gaskets, but wondering if I should put them on since they are going on a different block than they were originally mated with.
     
  2. Shaggy

    Shaggy 3/4 ton status

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    Yes, they should always have gaskets on them.
     
  3. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    if you don't want it to leak use a gasket /forums/images/graemlins/thumb.gif
     
  4. 90blzr

    90blzr 1/2 ton status

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    Thats what I figured...I just wonder why they didnt have any on them in the first place /forums/images/graemlins/confused.gif

    Do most engines come with gaskets on the exhaust manifolds? I've always had headers /forums/images/graemlins/thumb.gif
     
  5. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    I've wondered the same thing... the factory installs them without gaskets... They don't leak then... why install them later? Hell, I dunno. Just always wondered that myself.

    Regardless, I DO install them on every set of manifold/headers I've installed to date...

    -Dan
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    When the factory installs them, the manifolds have never seen any heat and are dead flat, so they seal. After the manifold has seen heat it will never be true again unless machined flat...so you need a gasket.

    Rene
     
  7. steelsoldiers

    steelsoldiers 1/2 ton status

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    I think the factory is able to machine the manifolds and the heads to such tight tolerances that the gaskets aren't needed. I always use them myself, cheap insurance /forums/images/graemlins/thumb.gif
     
  8. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    [ QUOTE ]
    When the factory installs them, the manifolds have never seen any heat and are dead flat, so they seal. After the manifold has seen heat it will never be true again unless machined flat...so you need a gasket.

    Rene

    [/ QUOTE ]
    yup what rene said /forums/images/graemlins/thumb.gif by the way i love the new pic rene /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    [ QUOTE ]
    by the way i love the new pic rene

    [/ QUOTE ]

    Thanks, I kinda like it myself! /forums/images/graemlins/thumb.gif

    rene
     

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