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Thread: 3.9 head gaskets

  1. 9th May 2011, 07:33 AM #1
    Duffman's Avatar
    Duffman
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    3.9 head gaskets

    i have to replace the head gaskets in my 96 disco and just want to know wich gaskets are better the composite type or the metal only type.
    cheers jono.
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  2. 9th May 2011, 08:28 AM #2
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    BigJon
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    I think 3.9s probably all had compsite type. PhilipA has recently done the job using composites (aftermarket I believe).
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  3. 9th May 2011, 10:18 AM #3
    mandala1111
    mandala1111 is offline Master
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    Agree with above that composites are the go.I looked into this very recently and was told by a rover engine rebuilder that steel can only be used if the heads and block are re-surfaced as they need a perfect surface for a good seal.
    Cheers
    Shane
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  4. 9th May 2011, 11:29 AM #4
    PhilipA
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    If you have a 96 Disco the heads are designed for composite gaskets . If you fitted steel gaskets you would have a higher compression ratio, but the inlet manifold may not fit properly and you may have to shim therocker pedestals to have the correct lifter preload.
    Regards Philip A
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