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Re: TR3A cylinder head torque

To: TR <triumphs@autox.team.net>
Subject: Re: TR3A cylinder head torque
From: Geo Hahn <ahwahnee@cybertrails.com>
Date: Wed, 14 Sep 2005 13:50:23 -0700
CFisher@borgwarner.com wrote:

>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? That's a lot higher than my
>bugeye head, though the studs are a lot beefier. 
>

On page 48 of my Haynes manual (step 59.7) it says to torque the head 
nuts to 45 lbs.  Elsewhere it gives the correct higher number but 
because of that paragraph I torqued my head to 45# and drove it w/o a 
problem for 20+ years.  Not recommending it, just noting the Haynes 
error and my results.

Geo Hahn



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