cylinder head cover (cam/valve cover) gasket comparison | FerrariChat
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cylinder head cover (cam/valve cover) gasket comparison

Discussion in '348/355' started by INTMD8, Jun 22, 2024.

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  1. INTMD8

    INTMD8 F1 Veteran
    Owner Silver Subscribed

    Jun 10, 2007
    6,766
    Lake Villa IL
    #1 INTMD8, Jun 22, 2024
    I measured the cover from the spark plug holes to the rail and the plug holes are .031 proud of the rails.

    Plug o-ring groove is .0275 deep and o-rings .040 (so .0125 proud)

    Removed gasket (compressed of course)- .0305

    Eurospares gasket .0425 When installed the cover barely touched the o-rings at spark plug holes.

    Superformance gasket .0350 Still too thick.

    Ricambi gasket .031 Perfect


    I have no idea about consistency, just thought it's worth mentioning that it is something that should be measured.

    If too thick you will have no sealing at the plug holes and less than optimal compression of the o-rings at ends of cover.
     
    tatry68, 308 GTB and MAD828 like this.
  2. MAD828

    MAD828 F1 Rookie

    Oct 8, 2011
    2,631
    Sydney
    Full Name:
    Elliott Caras
    #2 MAD828, Jun 22, 2024
    That’s great info Jim. I just re did mine with Ricambi major service kit.
     
    308 GTB and INTMD8 like this.
  3. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,100
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #3 Rifledriver, Jun 23, 2024
    Many aftermarket gaskets and seals are out of spec. Especially seals and O rings. Most suppliers are just buying generic seals and O rings. Many times close but not correct. Many around here reject the idea but a lot of those small differences are important. Look at what the really good shops use. They do it for a reason.

    Thats not to say in every case the currently supplied OE are best. There are exceptions and head gaskets are a good example. But you need to know how to pick and choose.
     

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