Never heard of this failure on this side of the pond.
What do you rev, what cam lift you use, what rocker do you use, which valve
spings?
Maybe too much torgue on the bolts, or not enough torgue?
Stange thing. I use the old stock bolts and had no failure till now with a
mileage of about 2000 mls.
Chris
----- Original Message -----
From: "Jack W. Drews" <vinttr4@geneseo.net>
To: <fot@autox.team.net>
Sent: Monday, May 19, 2008 3:30 PM
Subject: [Fot] Rocker stand studs
> Again this weekend one of our TR competitors suffered valve train
> damage because the rear rocker stand stud backed all the way out, the
> shaft broke, and rockers were damaged. The studs appeared to be grade
> 8 studs, the one that backed out was not damaged, and the threads in
> the head were not damaged. On this particular engine, the rocker
> shaft stands were steel and were in as-new condition.
>
> I've seen multiple occurrences of two failure modes -- one is
> breaking the end studs, the other is studs backing out. Both
> resulting in collateral damage.
>
> What is the collective wisdom of the list regarding
>
> ---prevention of breaking?
>
> ---prevention of backing out?
>
>
>
> uncle jack
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