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RE: TR3A cylinder head torque

To: <triumphs@autox.team.net>
Subject: RE: TR3A cylinder head torque
From: "Randall" <tr3driver@comcast.net>
Date: Wed, 14 Sep 2005 11:47:02 -0700
> Since I've had wrong torque figures in Haynes manuals before
> (resulting in a
> sump bolt broke off in an A-series motor)can someone confirm a
> cylinder head
> torque of 100 to 105 ft/# for a TR3a head?

Same figure is listed in the factory shop manuals.  I've used it myself for
many years.  It is a lot of torque, and stretched studs are not unknown on
these engines, but I'm pretty sure I've only stretched studs when exceeding
the factory torque (to try to keep the head gasket sealed).

Randall




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