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cork gaskets?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TX Mudder, Nov 27, 2001.

  1. TX Mudder

    TX Mudder 1/2 ton status

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    I'm using cork gaskets on the valve covers and oil pan.
    Do I need to use RTV or gasket sealanty (like Hi-Tack)?
    Do they need to be re-torqued after a while?
    Also, what about head gaskets? Do they need to be re-torqued after break-in? If so, what a PITA.
    -- Mike

    <font color=blue> Married to a woman who understands the need for <font color=orange>Hugger Orange. [​IMG] <font color=blue>
     
  2. sosamantx

    sosamantx 1/2 ton status

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    I'd use a sealant (permatex?) on cork gaskets, and you'd probably want to check them again after a while. I've never personally torqued them, although i've heard some people do. and, no to the head gasket question.

    <font color=blue>Steve Sosa a.k.a. "sosaman"</font color=blue>
    <a target="_blank" href=http://sosaman.home.texas.net/carpics.html>http://sosaman.home.texas.net/carpics.html</a>
     
  3. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    -I use a little RTV on both sides of a cork gasket for the oil pan and valve covers. No RTV if its a rubber type gasket!
    -As I recall, you should re-torque the head bolts for fresh head gaskets after about 500 miles or so of break in. Letting the engine heat up and cool down a few times. You might be sorry if you don't.
    -Re-torquing valve covers &amp; oil pan? Well, those valve covers are gonna come off to re-torque the heads, so there's some new valve cover gaskets... I'd say why not check and re torque the oil pan too at the same time just to be safe, it could prevent a leak later on down the trail.
     
  4. pr1aw

    pr1aw 1/2 ton status

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    FOR RETORQUING THE HEADS, GO WITH WHAT THE MFG OF THE GASKETS SAY. SOME WANT THEM RETORQUED AND SOME DON'T. I FIND THAT FELPRO DO NOT REQUIRE IT. IF YOU GOT A DETROIT GASKET (MY .02) THROW IT AWAY.
     
  5. FWP

    FWP CRS

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    Here's a little trick I learned. Coat the WHOLE cork gasket (including the edges) with a THIN coat of good RTV. Let it dry. Recoat the sealing surfaces, and bolt it on. Basically turning a cheap cork gasket into a rubber one.

    Oh another thing, don't use those chrome aftermarket covers-cheap ars tin, IMHO, and no baffles either.........

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a><P ID="edit"><FONT class="small">Edited by FWP on 11/28/01 03:46 PM.</FONT></P>
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    I use FelPro's double thick cork for my valve covers. THey have a piece of metal inbetween each cork layer and are literaly twice as thick. No RTV used and still not leaking. Before thease thick deals I allways had a leak or two but not any more..[​IMG]

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <a target="_blank" href=http://coloradok5.com/gallery/Burt4x4>http://coloradok5.com/gallery/Burt4x4</a>
     
  7. sarazk5

    sarazk5 1/2 ton status

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    I had them put rubber ones on my valve cover gaskets. Haven't had any leaks. I used the Cork/Rubber combo premium ones from napa on my oil pan, with RTV sealer. That hasn't leaked yet either. Cross my fingers!
     

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