AT-10 Head Gasket

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  • March 14, 2015 at 10:00 pm #922
    kevinf
    Participant

      I’m putting together an AT-10 with an LT-10 as a parts donor. One of the spark plug holes is stripped out so I was going to pull the head off the LT. Before I do – are the gaskets still available or should I be very careful and try to save one? Would it make more sense to insert a helicoil and put a bit of grease on the tap so I don’t have to pull either head? I don’t remember the last time I worked on a motor with removable heads and I’ve read all the horror stories about broken head bolts ….

      Kev

      March 15, 2015 at 5:56 am #12011
      Mumbles
      Participant

        If you can’t find a gasket, I’d go with a Heli Coil brand insert specifically designed for spark plug thread repair and not a regular thread repair insert.

        March 15, 2015 at 6:25 am #12013
        lloyd
        Participant

          US Member

          I posted a long reply and it showed up but 10 minutes later it got deleted????

          Short version. Recommend you test compression on both powerheads first to decide how to procede. If the LT is the best powerhead, just swap the whole powerhead. If AT is better powerhead, you can make good head gasket from Victor Reinz JV127. Broken head bolts is a long subject.

          March 15, 2015 at 6:35 am #12014
          lloyd
          Participant

            US Member

            I have seen a LOT of failed helicoil spark plug repairs, so I don’t use them. And they are not cheap. Not saying it cannot be done. I just don’t trust them. Much rather swap heads and take the risk of broken head bolts, which are not a big deal, if you know how to deal with them. Just my opinion.

            March 15, 2015 at 5:45 pm #12036
            garry-in-michigan
            Participant

              Lifetime Member

              It looks like we may have some hacker problems. I had one of my posts deleted also.

              🙁

              March 15, 2015 at 5:52 pm #12037
              kevinf
              Participant

                There was no quick way to get a compression test as there weren’t enough threads left on the one head to hold a plug and the donor is in pieces. I ended up pulling the head off motor and making a new gasket. Bolts were tight but I didn’t break any so I didn’t have that one to deal with.

                Of course we all know my next problem. Exactly – if I can just find a torque tube, a few small pieces and helicoil some threads into my donor motor with a bit more work I could have both an AT-10 and an LT-10 on the rack! I really should know better by now.

                Thanks
                Kev

                March 15, 2015 at 8:50 pm #12052
                ede
                Participant

                  US Member - 2 Years

                  Head gasket is available, p/n 41336

                  March 15, 2015 at 9:57 pm #12060
                  garry-in-michigan
                  Participant

                    Lifetime Member

                    They have ten in stock …

                    http://www.marineengine.com/newparts/part_search.php?part_num=0041336&x=19&y=20

                    . . . . 😉

                    March 16, 2015 at 1:00 am #12083
                    Mumbles
                    Participant

                      http://www.boatpartguys.com/ocart/41336E?search=41336

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