To the person that stripped out a threaded hole in his cylinder head with
his torque wrench, I would suggest that you get a "beam type" torque wrench,
rather that the "clicker type" you surely must have been using.The Clicker
type gives you no warning about when it will click, and you have no idea
where you are as far as the torque goes.With a beam type, you always know at
what torque you are at.Then when you get close to your torque setting, you
can slow down and take it easy as you carefully approach, and then reach, the
desired setting.You won't go over the desired setting, unless you are paying
no attention.The "dial-type" torque wrench has the same good points as the
beam type, but are a little bit more difficult to use, as you must first set
the dial, and then pull the wrench to reach zero.These type are also very
expensive, unlike the beam and clicker type.You also want to use a torque
wrench of the correct torque span-in other words, you don't use a torque
wrench for a fastener if the desired setting is at either end of the span(for
instance zero to 100 foot pounds)of the torque wrench.You wouldn't use a
0-100 ft/lbs wrench. if the desired setting is 90 ft/lbs, as it is too close
to the highest setting.You would want a wrench of,say,50-150 ft/lbs.
I hope this makes sense.
Jon Neet