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  1. #1

    ARP head studs and Riva gasket

    Should I install ARP head studs when I refit my head? Are there any disadvantages? What stops the stud unscrewing rather than the nut when I next take the head off?

    Does anyone have any experience of using the Riva heavy duty head gasket? Is it good, bad or ugly?

    cheers


  2. #2
    AtoMIC_OraNGE greenbullet's Avatar
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    Oem head gasket all day long!

  3. #3
    Boost addict hotbird's Avatar
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    The arp studs have a Allen type head (hole) in the top of them.

  4. #4
    Boost addict hotbird's Avatar
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    Click image for larger version. 

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    Picture might help you.

    (Side note)
    When you pull the rocker shaft you don't want the valve to look like that.
    That means you dropped a valve.

  5. #5
    I understand that they have an hex inner, but when you come to take the head off next time. If the nut is tight, what stops the whole nut and stud coming out of the block together? Or is this normal and ok?

  6. #6
    Boost addict hotbird's Avatar
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    It's never been a problem for me. But if your worried drop a box end wrench on the nut and a Allen on the stud and push them in opposite directions.

  7. #7
    Eastside Powersports Slow 91's Avatar
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    The stud shouldn't come out with the nut, maybe you have some slightly bothered threads?

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  9. #8
    SLASHER's Avatar
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    Done many motors with arp studs and never wound out with nut ...

  10. #9
    Quote Originally Posted by Slow 91 View Post
    The stud shouldn't come out with the nut, maybe you have some slightly bothered threads?
    Haven't done it yet!

    Just applying logic that if you have two threaded ends on a stud, what stops the stud rotating and unscrewing in the block when the nut is un-screwed. I guess I am asking do you loctite them in? Use a certain degree tightening to lock / over stretch the threads?

    If you follow the instructions, you install them finger tight, set on the head, then torque up the nuts to 100lbs in stages. All this torque must have been transferred down the stud into the block (Newtons third law) - with me?. So in reverse, the torque needed to release the nut AND the stud from the block (all things being equal), should be the same, so there's a 50/50 chance it will unscrew at the same time as the nut? Of course there may be un-calculated forces involved here, ie, the friction on the shaft of the stud on the cylinder hole wall, some heat bonding in the block end. But somethings no equal or it's black magic?

    It just seams weird that it doesn't happen despite having the same forces present and required.

  11. #10
    Boost addict hotbird's Avatar
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    Your making something very simple and over complicating it!

    The nut side is a fine thread the stud into the block course thread.

    Even if the stud unscrewed from the block who cares. It really doesn't matter.

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