That all depends on so many things. Torquing a bolt is not very precise no
matter what. If you have a hard washer, good lube, and clean bits the
stretch you get from a given torque can be much greater than dirty bolt,
soft washer, no lube. That's both good and bad--stretch is what breaks the
bolt (close enough anyway). If you really want answers about this kind of
stuff you need Carroll Smith's book on fasteners.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of Randall
Sent: Saturday, April 09, 2005 12:24 AM
To: fot@autox.team.net
Subject: RE: re-torque cyl heads
> and you were to loosen the bolts
> before re-tightening them.
Hmm, I was taught to always loosen first when doing a re-torque. Otherwise,
stiction (static friction) screws up your torque reading. Likewise, when
approaching the final torque value, you have to keep the nut or bolt moving
until you reach the value. If you stop just a little bit short, it will
stick and not turn the rest of the way.
Randall
|