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Valve covers wont stop leaking

Discussion in 'The Garage' started by ntx78k5, Oct 17, 2005.

  1. ntx78k5

    ntx78k5 1/2 ton status

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    Ive used three different sets of gaskets, RTV silicone and the rubber gaskets with the metal core and they wont stop leaking.
    its a 350V8 with stock valve covers, is there a real simple trick I am missing???
     
  2. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    are you using just bolts? or some of the fancy wingnut things? are the gasket fitting the gasket lip properly?
     
  3. BIG*RED

    BIG*RED 1/2 ton status

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    are the covers straight? and how tight are you getting the bolts? a lot of people over tighten them
     
  4. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    also are your covers stamped steel? they are real bad about getting dimples where the blot hole is from over tighting them
     
  5. K30Blazer

    K30Blazer 1/2 ton status Premium Member

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    most likely overtightening like has been mentioned before.
     
  6. ntx78k5

    ntx78k5 1/2 ton status

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    Using stock bolts, news hold downs and they are the original stamp steel. They look striaght with no dimples. Are they supposed to be tightened in a specific pattern? torged to certain ftlbs?
     
  7. sweetk30

    sweetk30 professional hooker Premium Member

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    dry it all off and try some permatex tac-n-seal little white can. the stuff is red in color and smells like some good stuff:screwy: if you know what i mean. aply to heads and v/c and install with just that and gasket.


    this stuff is super stickky and grips stuff good.
     
  8. wildbilzrydn

    wildbilzrydn 1/2 ton status

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    Make sure the oil is draining back properly from the rocker area. The gaskets in a chevy aren't designed to do anything other than contain the mist. Thats the problem with mine now.
     
  9. ntx78k5

    ntx78k5 1/2 ton status

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    I actually have some of that stuff and it smells real good. will try that out.
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The best cure I found for leaking sbc covers was to replace them with cast aluminum covers. They're rigid enough and flat enough to provide even clamping force along the entire gasket, not just near the bolts.

    I ended up buying some old Edelbrock cast covers at a swap meet...

    Rene
     
  11. ryan22re

    ryan22re 1/2 ton status

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    or swap to center bolt heads.

    ryan
     
  12. Brocky

    Brocky 1/2 ton status

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    Ya that permatex tac-n-seal worked for me. Smells good like mentioned as well. My only question is. In the PCV there is a little ball isn't there. I replaced mine but there was no little ball :doah: . I have been driving it for months since and havn't had any problems, so where is the ball ? hehe
     
  13. stayaway

    stayaway Registered Member

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    leave them kinda loose always works lol
     
  14. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    If you have blowby like crazy, it could be pressurizing the case and blowing out the gaskets.
     

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