Thread: ARP head studs
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Steve@Rennsport
Steve@Rennsport is offline
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
Quote:
Originally posted by Turbo_pro
Hi Steve
What fool questioned your expertise? I for one believe that you have the required knowledge to operate a torque wrench properly.

Don't you think that anti seize on any tread could promote loosening?

Do you use Loctite on the case end?

Why do you think the ARP studs are coming loose?
Hi Jim:

No worries, mate.

It would be inappropriate to name the party that suggested my inability to use a torque wrench on a public forum, even though the other party did just that,...

I have never used nor needed anti-seize on head studs, but I do use Loctite to anchor the case ends. Since it releases very easily with heat, its not a problem at all. I use anti-seize (copper or nickel based) on fasteners living in harsh environments that will be disassembled from time to time. Exhaust systems are a perfect example as well as suspension hardware that anchor into aluminum alloys.

Its my view that ARP head studs, while an excellent metallurgical product, do not accurately match the expansion rate of these engines very well and the head nuts loosen over time, especially with engines that operate at higher temps (930's, race motors, etc).

I use steel studs on the little engines and 993TT/RSR Dilavars on everything else. Been doing this since 1993 with no issues whatsoever.
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Steve Weiner
Rennsport Systems
Portland Oregon
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porsche@rennsportsystems.com
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Old 04-25-2007, 07:49 AM
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