Torque Spec: Crank S Bolt

[Richard J Lebens]

Ths site says:

http://www.sjmautotechnik.com/trouble_shooting/eng.html

"If you don't have the 2079 extension tool, the bolt should be torqued
to 332 lb-ft."

After mucho discussion several years ago I believe this to be correct.

Since I weigh 200 (221 holding a beer) and hav an 18" breaker it is
pretty easy for me.


--- Kenneth Keith <auditude at gmail.com> wrote:

> L DC <ldc007usa at yahoo.com>
> >
> > According to the Bentley manual, the torque spec for
> > the 27mm crank shaft pulley bolt on my '87 VW Quantum
> > Syncro, which shares the same drive train as the Audi
> > 4KQ, is set at 258 lbs USING tool 2079 (extension
> > bar).
> >
> > This means that in the absence of such tool, the
> > torque on the actual 27mm bolt is greater, correct?
> 
> Hi Louis,
> 
> I don't know if I would phrase it quite that way, but yes the applied
> torque on the crank bolt is greater than what you show on the torque
> wrench when you use the
> 2079.  If you had the torque wrench directly on the crank bolt
> without
> the tool and correctly torqued it, you would be reading higher ft/lbs
> on the wrench than the 258 ft/lbs.  The lever effect is multiplying
> the applied torque, presumably because of what you wrote next:
> 
> > 258 lbs of torque is alot of torque to begin with and
> > most torque wrenches I have come across in the Auto
> > parts stores max out at 200 lbs.
> 
> I think the 200 ft/lb limit of most commonly available (there are
> higher ones out there) torque wrenches (say 1/2" drive ones), is the
> reason for the factory tool being designed.  With the tool you can
> use
> a common torque wrench, and the Audi dealerships don't have to keep
> narrowly useful huge torque wrench around just for timing belt jobs.
> 
> > I have not asked at any of the stores I've visited for
> > higher torque wrenches. Would they carry any of them?
> 
> I don't know if I would have a use for a torque wrench that went
> higher than 200 ft/lbs.  A quality one would certainly be expensive. 
> It might be a better choice to use a 200 ft/lb one and the 2079. 
> Another alternative is to get the crank bolt as tight as you possibly
> can, because I believe the correct torque on that bolt is really
> high.
>  I also haven't heard of anyone putting too much torque on one.
> 
> Hth,
> 
> Ken
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