AT-10 Head Gasket

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This topic contains 8 replies, has 5 voices, and was last updated by Mumbles Mumbles 4 years, 2 months ago.

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    kevinf

    Replies: 122
    Topics: 14
    #922

    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

    Mumbles
    Mumbles
    Canada Member - 2 Years
    Replies: 3993
    Topics: 410
    #12011

    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.

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    lloyd
    US Member - 1 Year
    Replies: 95
    Topics: 0
    #12013

    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.

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    lloyd
    US Member - 1 Year
    Replies: 95
    Topics: 0
    #12014

    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.

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    garry-in-tampa
    Lifetime Member
    Replies: 3035
    Topics: 29
    #12036

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

    🙁

    Avatar
    kevinf

    Replies: 122
    Topics: 14
    #12037

    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

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    ede
    US Member - 2 Years
    Replies: 112
    Topics: 3
    #12052

    Head gasket is available, p/n 41336

    Avatar
    garry-in-tampa
    Lifetime Member
    Replies: 3035
    Topics: 29
    #12060

    They have ten in stock …

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

    . . . . 😉

    Mumbles
    Mumbles
    Canada Member - 2 Years
    Replies: 3993
    Topics: 410
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