Crank bolt torque for timing belt change (10v)
Huw Powell
audi at humanspeakers.com
Mon Dec 1 12:31:18 EST 2003
> I'm not sure why I bother, but shouldn't the torque actually be a lot
> more than that? If you use the tool and you're putting 258 ft-lbs on the
> t-wrench, then for simplifiying the numbers you can assume the t-wrench
> is exactly 1-foot and you're putting 258 lbs at the end of it.
Your assumption makes the rest of what you calculate irrelevant because
1. no torque wrenches are only 1 foot long (except itty bitty little
inch-ounce ones), and 2. if it was, to apply 258 ft-lb using a one foot
torque wrench, the poor tech would have to apply a full 258 pounds at
its end. I couldn't do that, since I weigh less than that...
To solve this problem you have to take a more abstract mathematical
approach, I think, you can't just invent torque wrench lengths - since
that is a variable that doesn't matter in this case.
Unfortunately, that whole rotational torque, moment arm thing was a
shady area in my arithmetical training. But I bet a decent algebra book
would have a way to solve this problem. That is, to convert a known
(rotational) at the end of a known length lever arm to the torque at the
other end.
See, it is no longer a "weight" at the end of the extension tool, I
think, it is a rotation. Might need a calculus book, not algebra, but
still.
Stand on the end of a four foot pipe and it won't fall off and it won't
break.
--
Huw Powell
http://www.humanspeakers.com/audi
http://www.humanthoughts.org/
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