Re: Am I Just Lucky?

["Al Powell" <APOWELL@agcom.tamu.edu>]

My friend Orin said:

> > 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.

Frankly, I wonder what the reason for the extension is....it looks 
like it does nothing more than move the wrench attachment point about 
6" out from the crank.  I can't imagine that it would come out at 90 
degrees to the bolt.  I'm gonna torque that thing tonight.  If I need 
it tighter later, I'll tighten it.



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Al Powell, Ph.D.                 Voice:  409/845-2807
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