Valve cover gasket grrrrr

Discussion in 'Original Drivetrain Topic' started by Allison Winn, May 2, 2021.

  1. Allison Winn

    Allison Winn Red70Z

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    I just had fresh oil dump all down the sides of my clean motor because of poor fitting gaskets. The cork gaskets seem too wide to fit in the channels of my original 1970 Z28 finned valve covers. I trimmed off where they had gasket for the offset bolt hole. Does anybody make gaskets that are drop in and perfect fit?
     
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  2. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    FELPRO 1628

    Steel core, ribbed silicone with compression limiters built into the gasket.

    They are NOT cheap but you don't need any sealant and they are reusable.
    I've used this style on my Camaro engine (with cast aluminum valve covers, on two different engines) for well over a decade with no leaks.

    You may be able to find them a bit cheaper but this link has a good, detailed pic of them.
    FEL-PRO Valve Cover Gaskets - JOES Racing Products
     
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  3. Chevyforever

    Chevyforever Veteran Member

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    It seems that RockAuto has a great price.
     
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  4. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    I second the 1628’s. Just got a set and they are very nice. I haven’t put them to the test yet, but if they don’t seal nothing will.
     
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  5. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    You will be happy with them.

    The steel core keeps them perfectly aligned, so you don't need to stick them to the valve covers with sealant to prevent them from shifting during assembly.

    If the bolts fit through the holes...they are in the proper location and you simply tighten until the valve cover hits the compression limiters.

    Even with tin valve covers, they should work well but with cast aluminum covers, they are virtually fool proof.
     
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  6. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    Also recommend the Fel-Pro one piece oil pan gasket OS34509T.
     
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  7. secondgenaddict

    secondgenaddict Veteran Member

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    IF you show the car high end --- I would nail you on points without a cork gasket.
    My Corvette had those stupid gaskets with the metal frame and silicone -- they leaked like a sieve - my engine was disgusting.
    I replaced them with cork 3 years ago - cleaned the engine - trans bell housing and now HAVE ZERO LEAKS.
    I have never had problems with cork if they are installed correctly - installing cork gaskets since before I could even leaglly drive. HOWEVER- like the factory did, I GLUE THEM INTO THE AL VALVE COVERS using the brown gasket gooo. Smells literally like crap.
    [​IMG]
    [​IMG]
    Then use some 1/4 -20 bolts and light snug the covers together gasket face to gasket face -
    Allow a couple hours to dry - remove the bolts -- and then wipe a little axle grease on the gasket to head sealing surface (so they will easily come off and be REUSEABLE.) and snug down using a 3/8 nutdriver - it is WAY too easy to over tighten these using a ratchet - SO DON'T USE ONE!
    [​IMG]
     
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  8. 70Znut

    70Znut Veteran Member Lifetime Gold Member

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    X2 Mine never leak
     
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  9. l16pilot

    l16pilot Veteran Member Lifetime Gold Member

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    I followed James' process using the cork and it works! No leaks :bowtie:
     
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  10. COPO

    COPO Veteran Member Lifetime Gold Member

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    I use Fel-Pro 1604 with no issues with studs and nuts on top. I seal to the cover and grease the head side.
    In the 70’s all I used was the factory single thickness cork gasket and never had any issues either. These just last.
    56B5C558-4B9F-461A-B2CF-B305F7CD9A83.jpeg A94FD2D1-5868-4E60-A226-4CF21921F5E7.jpeg
     
    Last edited: May 2, 2021
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