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stupid valve cover gasket

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by shupach, Oct 7, 2001.

  1. shupach

    shupach 1/2 ton status

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    i find it its the cause of a major oil leak(surprise, surprise). Whats really boggled my mind is the fact that i've replaced that gasket like 3x!!! i even torqued down the valve cover bolts to like 7 lbfts? and torqued them in the special pattern. is there any other way to make the leakin end? Right now im using rubber gaskets for it, i thought they might work a bit better than cork, but i could be wrong, please, help me.

    phill
     
  2. Smitty

    Smitty 1/2 ton status

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    Rubber works good. Big thing to look for is a straight surface on the valve cover and to use some of the spacers to spread out the force of the bolt. The stamped steel covers warp pretty easy and it's the only reason I go with the cast aluminum covers. I use a little of the 3M weather strip sealer to hold my gaskets in place when I put them on. If I use rubber I don't use any gasket sealer, just wipe everything down with some alcohol before I put it together.

    Smitty
     
  3. michaelm

    michaelm 1/2 ton status

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    why did chev decide that it didnt need to machine the VC mounting surface? ? ?
     
  4. Pugsley

    Pugsley 1/2 ton status

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    Probably got a set of warped covers - might need to use a set of cork gaskets with lots of RTV, Like Permatex's Ultra Black. Also take a fairly coarse flat file and scuff a crosshatch onto the valve cover mounting surfaces to "grab" the gasket a little better.

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  5. POWERMAD

    POWERMAD 1/2 ton status

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    The left coverr on my 73 used to leak like crazy.
    I used my high lift for a flat surface and a hammer and straightened the rails. then I applied a thin coat of RTV and let it set up.
    then I used a rubber gasget and spreaders and have been bone dry eversince.


    <font color=green> Too bad ignorance isn't painful </font color=green>
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I'm not a big fan of 'go fast' chrome and aluminum under the hood. I made an exception with my Valve covers. I found an old set of Edelbrock finned aluminum valve covers for cheap and said good-bye to leaks from my valve covers. The nice flat and rigid gasket surface allows for a much better seal.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  7. shupach

    shupach 1/2 ton status

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    i have edelbrock chrome valve covers and i have little spacers from the old valve covers. last time i used some rtv my gasket exploded and leaked everywhere. But ill replace 'em one more time.

    phill
     
  8. jimmyjack

    jimmyjack 1/2 ton status

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    Only 7 ft lbs? I thought the proper torque for valve covers was 25 or so. 7 doesnt seem more than just finger tight.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  9. Pugsley

    Pugsley 1/2 ton status

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    I'd have a hard time putting 7 ft/lbs on one of the later model "not quite as tough as tin foil" valve covers. Older ones I would say about 20-25 though.

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  10. shupach

    shupach 1/2 ton status

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    so like 7 lbs or 25? i've got the new edelbrock valve covers? i heard if i torque it down too much i kill my gaskets.

    phill
     
  11. Pugsley

    Pugsley 1/2 ton status

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    My rule of thumb is to tighten them just using an extension by hand, and then add 1/4 turn with a ratchet. I'm not sure what exactly I'd be torquing them to like that, but I've never had one leak yet using that method.

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  12. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Pugs is on the money........just a wee bit more than hand tight is lots for valve covers.



    <font color=blue> WE WILL NEVER SURRENDER<font color=blue>
     
  13. shupach

    shupach 1/2 ton status

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    i will follow in your ways pugs

    phill
     
  14. Pugsley

    Pugsley 1/2 ton status

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    You have passed the final test, and you are now ready Grasshopper, to take on the valve covers[​IMG].

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  15. dragricinMT

    dragricinMT 1/2 ton status

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    If uyou have to use rtv you have a problem. I have chrome edelbrock valve cover and use VICTOR-REINZ valve cover gaskest.They are cork-ruber but they are 5/16" thick. Twice as thick as regular gaskets. If I remember right the part # is VC38110HTC. Haven't had a leak in over 2 years. I also run t-bolt holddowns with spreaders and I just go just past finger tight.

    78-K5 4"Lift 35"Tires 400SB TH350 NP205
    73 Vega 350SB TH350
     
  16. chevyracing

    chevyracing 1/2 ton status

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    That way the silly-cone had something to stick to.. LOL

    Like to go sloppin' 'round in da mud in a rapid fashion....=)
     
  17. ftn96

    ftn96 1/2 ton status

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    REALLY? I didn't know the chrome would make the truck go faster.

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  18. Smitty

    Smitty 1/2 ton status

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    RTV won't stick to a lot of the rubber gaskets. That's why I just use a dab of 3-M weather strip sealer to hold them in place while I bolt them down. Not too sure of the torque but I use a flexible 1/4" extension that's made out of some spring stock. I think it makes it impossible to over-torque the bolts since it starts to break away with a little tension. Good luck since some of the newer trucks really make getting to the covers a real pain.

    Smitty
     
  19. TXBIGFISH

    TXBIGFISH 1/2 ton status

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    You might want to try and find the rubber valve cover gaskets with a spring in it, they are re-usable, I've had a set for a while and no leaks. They are more expensive but worth it! The aluminum vc and spreaders are on the money as well.

    &lt;*)))&gt;&lt;

    81" GMC Jimmy.............stock for now!
    I see a 6 inch lift in the near future!
     
  20. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    You just told me your problem, RUBBER, cork does alot better job. I had the same problem you did when I bought my edelbrock aluminum valve covers. Rubber gasket never seem to want to seat or stick worth a darn. Just buy a seat of fel-pro blue strip cork gaskets and use some RTV or weatherstrip adhesive to secure to your covers and I think you will quite pleased with the results, not to mention no more headaches.

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     

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