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What type of material os valve cover gasket made of

Discussion in 'XJ Technical Chat' started by kontiki, Dec 29, 2011.

  1. kontiki

    kontiki Member

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    For a non-YICS engine? Supposedly I am looking at a new one here and it a card-board or fiber like material, not rubber like.

    I purchased this on Ebay a while back, it was supposedly NOS for a 1980/81 XJ650. There are no markings on it that I can see.
     
    kontiki, Dec 29, 2011
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  2. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    That's correct. The non-YICS motors utilized a stiff fibre gasket of some sort. The two "half moon" plugs on the right side of the cylinder block are separate pieces; and yes, they're rubber so they aren't really supposed to be as hard as rocks.

    The YICS motors use the molded-rubber gasket with integral half-moons.
     
    bigfitz52, Dec 29, 2011
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  3. kontiki

    kontiki Member

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    Thank you Fitz! Much appreciated.
     
    kontiki, Dec 29, 2011
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