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Thread: Intake Studs - Too Short (?)

  1. 05-23-2020, 11:52 AM #1
    Hawkeye
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    Intake Studs - Too Short (?)

    I have just completed a mock-up on my 2.2L engine & with installation of new gaskets & heat insulators between the manifold & intake port.
    I now have this situation:
    Name: 911S -100_5333.jpg Views: 194 Size: 140.7 KB
    There isn't sufficient stud length for the sealing washers & the lock nut. In this photo you can see I didn't have sufficient space for
    the sealing washer - but as stated - this was just for mock-up purposes.

    I've installed new gaskets as per this snipped view from the PET:

    Name: Intake Studs.PNG Views: 197 Size: 12.4 KB

    Mine originally had only one paper gasket & no phenolic heat spacer when I disassembled things which may account
    for the shortened stud protrusion from the intake port on the cylinder head. Someone had either really ‘cheaped’ out
    & not installed the spacers or they weren’t originally part of general spec – although that seems highly unlikely to me.

    I would like to know if anyone of you has come across this situation & could specify a proper stud length before I order
    some new longer ones & start the process of disassembly/re-assembly for the new longer studs - which seems to me to be the
    obvious solution at this time.

    Any thoughts or advice will be most appreciated. Thanks in advance.

    Cheers
    JB
    Last edited by Hawkeye; 05-24-2020 at 09:58 AM.
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  2. 05-23-2020, 12:45 PM #2
    edmayo
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    Insulators were not factory installed. Those came later as a field fix for hot starting issues. The insulators from Porsche came with longer studs. I don't know the length off hand, just make sure they're about 1/4" longer than the ones you have.
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  3. 05-24-2020, 09:59 AM #3
    Hawkeye
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    Hi Ed
    Thanks for the background info on the insulators & suggestion for replacement stud length.
    I now know what I'll be doing in about half an hour.
    Cheers
    JB
    Success is not final, failure is not fatal: it is the courage to continue that counts. - Winston Churchill

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