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Head bolt sealant

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  • 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
    Re: Head bolt sealant

    All the head bolts enter the water jacket, all need sealant
    Permatex Aviation Sealant works nicely.
    NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

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    • #3
      Re: Head bolt sealant

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

      Comment



      • #4
        Re: Head bolt sealant

        it should ,I`ve always used a liquid type.
        Most good auto parts shouold carry it or order it .
        NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

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        • #5
          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

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          • #6
            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.
            NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

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            • #7
              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.

              sigpic

              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.

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              • #8
                Re: Head bolt sealant

                What about Indian Head sealant?

                Too old school?
                '84 Grady White Offshore
                350 Mag w/ Vortec Heads
                Alpha 1 Drive

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