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Thread: what is the thread pitch of our 84- early 85 headbolts?

  1. #1

    what is the thread pitch of our 84- early 85 headbolts?

    Ive contacted arp to see if they have any 10mm head studs i could use in my early 85 2.2L. They responded with:


    We will need dimensions from your block & head to see if we have something that will fit correctly. Here is a link to our online catalog, page 22. http://arpcatalog.com/files/assets/b.../index.html#22 We need the dimensions as indicated in the drawing at the top of the page. Please take dimensions from the block & head only - nothing from the bolts except the thread pitch & diameter. Send the info back to me

    Anybody know this info?

  2. #2
    turbo addict Turbo Mopar Contributor iTurbo's Avatar
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    Re: what is the thread pitch of our 84- early 85 headbolts?

    I will take a die to the 10mm headbolts that I just removed and find out Tom, in case you don't get an answer by this evening. BTW, I got the DC intercooler kit yesterday, thanks!

  3. #3

    Re: what is the thread pitch of our 84- early 85 headbolts?

    I dont have a die set, i have very little tools to work with in terms of a tool box

  4. #4
    turbo addict
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    Re: what is the thread pitch of our 84- early 85 headbolts?

    Tom,
    The expense of trying to buy 10mm studs, nuts, and washers, isn't worth it. Just buy a set of 10mm head bolts. They are dirt cheap if you search around a little. I'll bet I could buy 8-10 sets of bolts for what your gonna spend on one set of 10mm head stud kit. My 85 GLHT has lifted a head once in 27 years. To answer your question the 10mm bolt pitch for headbolts is 1.5mm, same as 11mm.
    Todd

  5. #5

    Re: what is the thread pitch of our 84- early 85 headbolts?

    Thanks

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