Re: was Re: Weepy Head Gskt Fix!is stretch bolt defence clamping methods,

[Avi <Avi@cosmoslink.net>]

You are SO RIGHT....
Avi


At 07:56 PM 12/28/97 GMT, you wrote:
>In message <3.0.4.32.19971228102631.006fdff4@mailer.cosmoslink.net> Avi
writes:
>
>> BTW, did you "really" know that stretch bolts (on heavy duty application)
>> are installed via a portable hydraulic press?...... the press is put on the
>> stud (not bolt), stretch the stud and you put on the nut finger tight, you
>> release the press and "voila" perfect torque..... 
>
>I've seen a Rolls Royce engineer bolt up a head with a dial gauge on the
end of 
>the stud.  I also went on a short course as a rally mechanic with British 
>Leyland where they showed us how misleading torque wrench readings can be
with 
>dirty threads: +/- 1/3rd or more!
>
>-- 
> Phil Payne
> Committee Member, UK Audi [ur-]quattro Owners Club
>
>