shrink fit sleeve for stripped main stud - Page 2
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  1. #21
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    Are you sure about that 90lbs torque spec? The handbook maxes out at 70 for grade 12.9 studs.

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    Quote Originally Posted by g-coder05 View Post
    Are you sure about that 90lbs torque spec? The handbook maxes out at 70 for grade 12.9 studs.
    ARP uses magic metal.

    Pretty common to overtorque ARP headstuds 180% and they don't stretch a bit.

  3. #23
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    Pretty sure the torque is way off. heres a old post here with the specs for Studs in Aluminum...
    torque for screws in aluminum engine block

  4. #24
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    Here is the page for only main studs ARP has for a Hyudai.

    Click instructions to get the PDF, 1x1.25 and 70 ft/lbs.

    Which seems REALLY high to me for the size of stud and the fact
    that the block is aluminum..

  5. #25
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    Correct torque value not withstanding, suggest:

    1) drill and tap the location for an M12 thread. Coarse probably better.

    2) manufacture a steel OD/ID threaded sleeve to match the threads involved. Simple 1018
    should work fine. Install by putting your stud into it, and locking it on there with a
    nut jammed in place.

    3) use green locktite when installing. (remove installation stud before
    lockite sets up!) If *that* pulls out then you were in deep trouble at
    that location in the original casting.

  6. #26
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    i may be mixing up the torque values in my post since im not looking at the papers but 70lbs sounds about right. maybe the head studs were 90 and i was thinking of that. ill give the m12 thing a try and if that doesnt work then i guess im gonna have to cut this thing spart 🙃 thanks for all the quick replies, really never had such a positive first experience on a forum before.

  7. #27
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    Quote Originally Posted by jim rozen View Post
    Correct torque value not withstanding, suggest:

    1) drill and tap the location for an M12 thread. Coarse probably better.

    2) manufacture a steel OD/ID threaded sleeve to match the threads involved. Simple 1018
    should work fine. Install by putting your stud into it, and locking it on there with a
    nut jammed in place.

    3) use green locktite when installing. (remove installation stud before
    lockite sets up!) If *that* pulls out then you were in deep trouble at
    that location in the original casting.
    You didn't read the thread , did you? If you had you would know that the wall thickness he has left is slightly more than heavy aluminum foil. He doesn't have enough for a 12mm thread and never did.
    OP, regardless of how magic the ARP studs are, you are still screwing them into a Hyundai. Forget what they say, their numbers were probably high for cast iron. Read g coders link and be aware that those numbers are high. If you are trying something with a Hyundai engine that requires such studs then you are fooling yourself.
    Y

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