[TR] would any of you re-use head studs?

[Steve Kirby]

Modern engines use a “stretch to clamp” type of head stud which maintains the torque.  These are a “one and done” part and cannot be reused, which has given rise to the myth that head studs should always be replaced.  Our old cars were not that technically sophisticated.  As long as the old studs show no signs of corrosion or other physical damage, there is no reason not to reuse them.  I would chase the threads on both the studs and nuts to be sure there is no binding which would give you a false torque reading.  I use the blue thread locker on the end that goes into the block and anti-seize on the nut end (though that is a subject of some debate).

Steve Kirby
President
China Auto Group
22831 Avenida Empresa
Rancho Santa Margarita, CA 92688 USA
Direct:  (949) 261-8208
Fax:  (949) 767-5949
Cell:  (949) 903-0957
Skype: steve.kirby29
www.chinaautogroup.com

From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Greg Lemon
Sent: Tuesday, March 9, 2021 11:15 AM
To: Cliff Hansen <cliff_hansen at outlook.com>
Cc: list Triumph <triumphs at autox.team.net>
Subject: Re: [TR] would any of you re-use head studs?

I know some people always replace them, I have never replaced them and never had a problem with head gaskets or heads--the includes Sprite/Midget, MGB, 4 and 6 cylinder TR, and big Healey.

Somebody, maybe Randall, said run a good nut up and down the thread, if stretched it will bind.

Greg Lemon, TR250

On Tue, Mar 9, 2021, 1:06 PM Cliff Hansen <cliff_hansen at outlook.com<mailto:cliff_hansen at outlook.com>> wrote:
I respect your collective advice and experience. The 4A’s head is at the machinist for a cleanup (head gasket failure). Would any of you re-use the head studs, or would you replace them? They are likely original, and even if not, have been in place for at least 25 years. I have my thoughts on this, but am interested in yours.

Thanks,

Cliff


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