David -
I have had poor luck using Helicoils on head fasteners. They are very good
in other applications, though. I prefer threaded inserts such as Keenserts
(other brands are acceptable). The hole is drilled oversized, and tapped
for the insert outer thread, It's screwed in (some brands recommend
loc-tite) then the locking feature activated. They have worked
successfully on head studs for air-cooled motors running pretty high
compression ratios (high temps and lots of pressure).
Clay L.
'67 Sprite
At 08:17 AM 7/14/01 -0400, Larry B. Macy wrote:
>One word: Helicoil. I really think it should be Healycoil ;-)
>
>Larry
>
>On 7/14/01 1:13 AM, "David Ramsey" <dwramsey@worldnet.att.net> wrote:
>
> > David, I hate to be the one to tell you but you ain't stretching ARP
> > studs!!!! You also ain't striping the threads on the ARP nuts & studs.
> > That leaves only the threads in the head.
> > Crash
> >
> >> BTW, the MGA head is on and correct new studs were used (ARP) and I still
> > felt a
> >> couple stretch. You know the feeling when the torque wrench never clicks
> > but
> >> just keeps turning. I may replace those studs one at a time.
> >
> >
>
>--
>
>Larry Macy
>78 Midget
>
>Keep your top down and your chin up.
>
>Larry B. Macy, Ph.D.
>macy@bblmail.psycha.upenn.edu
>System Manager/Administrator
>Neuropsychiatry Section
>Department of Psychiatry
>University of Pennsylvania
>3400 Spruce St. - 10 Gates
>Philadelphia, PA 19104
>
> Ask a question and you're a fool for three minutes; do not ask a question
>and you're a fool for the rest of your life.
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