Am I Just Lucky?

[quk@sievers.com (Phil Payne)]

In message <789C241055@agcom.tamu.edu> "Al Powell" writes:

> > > 2)  My Bentley specifically shows the torque on the crank bolt to be 
> > > 258 lbs/ft., or 350 n-m.  I have heard specs of upwards of 300 foot-
> > > pounds quoted for this.  Unless there is a heckuva lot of variation 
> > > of torque specs from year to year on the I-5, someone is overtorquing 
> > > their bolt, according to my sacred "Book o'Bentley".
> > 
> > For the 84-88 5k, the Bentley shows an extension tool (2079?) which is
> > approximately 12" long.  The given torque spec was for use with this
> > tool only.  Assuming a torque wrench of around 18" length, we calculated
> > the torque at the bolt to be 400 - 500 ft-lb!
> 
> I've looked at the drawing of tool 2079 (you are correct) and it 
> appears to be simply an extension which sticks straight forward in 
> line with the center of the bolt - hence, much like using a 6" 
> extension in the socket.  If this is an accurate perception, then the 
> torque would remain unchanged from the book spec.

The German microfiche for the WR and MB engines says "use the tool" and the 
torque wrench setting should be 350Nm.  It also says that "2079 should be free 
to move with the torque wrench".
 
The 20V (RR) documentation says the same thing (also 350Nm) but it adds the 
comment that a torque of 450Nm is required if tool 2079 is not available.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club