Re: Torque Wrench Extension

[paul.heneghan@bbc.co.uk (Paul Heneghan)]

From: "R. Cummings" <cumm@flash.net>

>Maybe I missed something on this torque wrench extension tool but FWIW the
>extension allows you to use a smaller torque wrench to get the 258 ft lbs 
at
>the nut. e.g. If the extension is the same length as the torque wrench you
>only need to torque to an indicated 129 ft lbs to get 258 at the nut.
>        Torgue at nut = (indicated torque)*(total length (center of nut to
>torque wrench handle pivot))/(torque wrench length (center of attachment to
>center of handle pivot)).

This isn't quite right.  You are supposed to get the 258ftlbs AT THE TORQUE 
WRENCH.  Manuals from three different companies specify this very clearly - 
Haynes, Autodata (I think) and Bentley.  (I have seen a couple of early 
manuals just give the torque as 258 without saying that the special tools 
must be used, but later manuals from the same publisher correct this.) This 
works out to give you about 430ftlbs at the nut which is way outside the 
range of most torque meters.

It is not a good idea if this bolt comes loose (BTDT).

The expert knowledge on this list seems to be of the opinion that the 
antiseize is put on the bolt to prevent the ingress of water into the 
threads rather than for its antiseize properties.

Paul
paul.heneghan@bbc.co.uk
1984 Audi 80 quattro
1989 Audi 100 Avant