Crank bolt torque for timing belt change (10v) - whyanextension mutiplies torque

[Phil Payne]

>> The manual is QUITE specific about how it is to be held - one hand in
>> the exact centre of a padded rubber grip.  If two hands are used, they
>> must overlap one another.
 
> My El Cheapo (Craftsman) beam torque wrench has a
> plastic grip over the metal shaft. The grip moves around
> a center pivot, like a see-saw (teeter-totter). The correct
> procedure is to "float" the grip over the handle as you
> apply pressure, like you are balancing a see-saw. If you
> let the grip touch the shaft, you in effect shorten (or
> lengthen) the distance from the nut/bolt at which the
> torque is applied, thereby applying less (or more) than
> the amount of torque indicated.

That's an even more rigorous implementation of the same principle.

-- 
  Phil Payne
  http://www.isham-research.com/quattro
  +44 7785 302 803