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Thread: ARP head stud torque?

  1. #1
    Hybrid booster guyd_15's Avatar
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    ARP head stud torque?

    I've heard a couple different numbers. This is for a high boost application (switchable boost 15 psi street, 29 psi track w/ race gas).
    Thanks,
    Guy

  2. #2
    Heroes never die, they just reload! Turbo Mopar Staff Frank's Avatar
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    Re: ARP head stud torque?

    45ft/lbs and then do it at 90ft/lbs and then after a few heat cycles, back them off and retorque at 90??????
    Frank Katzenberger
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  3. #3
    Hybrid booster guyd_15's Avatar
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    Re: ARP head stud torque?

    Thanks, Frank.
    Guy

  4. #4

    Re: ARP head stud torque?

    Back them off? Wouldn't that risk getting oil between the head and headgasket thus making it bad? I'd simply verify that they are still at the 90lbs of torque you set them to. No backing off at all.

  5. #5
    boostaholic
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    Re: ARP head stud torque?

    I was told to do it like this

    Chuck Green BIG PSI info

    torque to 45lbs
    loosen
    torque to 45lbs
    loosen
    torque to 70lbs
    loosen
    torque to 70lbs
    loosen
    torque to 90lbs
    loosen
    torque to 90lbs
    then 1/4 turn

  6. #6

    Re: ARP head stud torque?

    loosen, replace headgasket, tighten, loosen, replace headgasket, tighten, loosen, replace headgasket....

  7. #7
    Hybrid booster
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    Re: ARP head stud torque?

    ARP Head studs/bolts are not torque to yield. I don't know about the 1/4 turn. I go 10 lb steps from 20 to 75 ftlbs if it's a stock or felpro gasket. I go to 95 if it's a multi layer steel gasket.(Cometic) I don't loosen them either. I just click them to the last step after 100 miles or so.......

  8. #8

    Re: ARP head stud torque?

    I'm with Jerry.. That's how I do mine. torque each bolt a little at a time.. 10 pound steps so nothing gets warped or seats unevenly.

  9. #9
    Hybrid booster guyd_15's Avatar
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    Re: ARP head stud torque?

    Thanks
    Guy

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