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another valve cover gasket question.

Discussion in '1982-Present GM Diesel' started by colbystephens, Mar 5, 2006.

  1. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    so my valve covers aren't perfectly flat and i used the gaskets from my felpro top end kit which happen to be cork. i'm still in the assembly stage of my engine (last steps) and so what i did was poured some oil over the cylinder heads before i put the valve covers on, then when i put the gasket/cover on, i tipped the engine to the side a bit to make doing the other side slightly more convenient - oil leaked out. so i'm wondering if this will be a problem when it's in the engine straight up and down. should i take it off and use one of the rtv sealers? what type should i use?
     
  2. imiceman44

    imiceman44 1 ton status

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    How tight did you go on the bolts?
    With the cork gasket you don't want to go too tight it will tweak the cover and leak.
     
  3. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    the cover was originally "tweaked", but i'm sure that i went overboard - i don't have a torque wrench which goes to a low enough torque. :(
     
  4. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    not sure how the 6.2 covers are setup for bolts, but i'll bet bottom dollar its because its tweaked... take it off, lay it on a flat surface and see how wobbley it is..

    you should be able to get it back in shape with some muscle or a hammer and piece of thick flatstock...
     
  5. afroman006

    afroman006 1/2 ton status

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    Just get a new cover they arent exactly rare.
     
  6. imiceman44

    imiceman44 1 ton status

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    I straighten mine on a flat steel surface.
    And I just use my 1/4" drive ratchet 4" long handle and just one handed snug tighten.
    I do the same on my auto trans pan gasket when I use the cork gasket, never had a problem after that.
    But make sure you start with a straight edge cover.
     
  7. azblazor

    azblazor 1/2 ton status Premium Member

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    I use RTV only (no other gasket) with good results. But I straighten the mating surfaces.
     
  8. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    spoke with my machinist, and he recommended that I use 3m window sealer to hold the gasket in place, and wait for it to set. then use a small amount of rtv sealer on top of the cork gasket. i'm going to go with this method tonite.
     
  9. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    he prolly meant 3M weatherstrip adhesive.... very common to use that...
    [​IMG]

    i prefer Hi-tack myself...

    [​IMG]
     
  10. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    cool. thanks for the tip. that's what the parts store recommended too.
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I use the neoprene gaskets and have no leaks. I hate cork gaskets..:crazy:

    Rene
     

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