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  1. #1
    Petty Officer 1st Class
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    Default Head bolt sealant

    Can anyone tell me which head bolt holes exactly need sealant because they are in the water jacket? Engine is 4.3 OMC '88...also, what should I apply on the ones that don't go into the water jacket?

    Thanks!

  2. #2
    Fleet Admiral
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    Default Re: Head bolt sealant

    All the head bolts enter the water jacket, all need sealant
    Permatex Aviation Sealant works nicely.

  3. #3
    Petty Officer 1st Class
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    Default Re: Head bolt sealant

    Will Permatex #2 work? I haven't seen the aviation stuff in any stores yet....

  4. #4
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    Default Re: Head bolt sealant

    it should ,I`ve always used a liquid type.
    Most good auto parts shouold carry it or order it .

  5. #5
    Petty Officer 1st Class
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    Default Re: Head bolt sealant

    I looked it up, and I actually have seen it before....would it be worth it to go ahead and buy the Aviation if I already have the #2? What's the advantage of the liquid type?

    Thanks

  6. #6
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    Default Re: Head bolt sealant

    comes in a big container with a brush attached to the cap, fingers don`t get coated along with the bolt,impossable to step on and get it all over the boat.
    When replacing the bolts it`s a good idea to clean the block holes with a tap and to wire brush the bolts clean.

  7. #7
    Honorary Moderator Emeritus Don S's Avatar
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    Default Re: Head bolt sealant

    When replacing the bolts it`s a good idea to clean the block holes with a tap and to wire brush the bolts clean.
    Then with the liquid, it makes a nice even coat so it's fast, easy, and it doesn't affect the torque if you do the above first.
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

  8. #8
    Commander FreeBeeTony's Avatar
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    Default Re: Head bolt sealant

    What about Indian Head sealant?

    Too old school?

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