[DeTomaso] lug nut question

[Tomas Gunnarsson]

Mike,

While I agree that the proper procedure of retorqueing is to back off and
retighten I don't agree that the stud will break when retorqued without
backing off. When using a "click" typ wrench you'll notice that when you
tighten from the loose state until the wrench clicks you can let go of the
wrench and then retorque until it clicks with no nut movement whatsoever. It
takes more torque to start the rotation from a standstill and continue than
the torque needed to get there from a looser state.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of MikeLDrew at aol.com
Sent: den 21 augusti 2010 04:34
To: boyd411 at gmail.com; detomaso at realbig.com
Subject: Re: [DeTomaso] lug nut question

<cut away text>

When you torque a fastener, you're actually stretching it.   If you're
going to compulsively check it, first you must LOOSEN the fastener slightly,
then bring it back up to the appropriate value.   If you torque it to the
right
value, then just retorque it, then retorque it again, each time you're
making it tighter and tighter, stretching the fastener more and more, until
finally it fails.

I remember many years ago, there was a douchebag Ferrari guy at a track
event at Laguna Seca, prancing around in his Ferrari logo driving shoes and
Ferrari logo driving pants and Ferrari logo driving shirt and Ferrari logo
driver's gloves and Ferrari logo hat, and of course his helmet had a bunch
of
Ferrari logos on it as well.   He made a big, big show of re-torquing the
lug
nuts on his late-model Ferrari (348 I seem to recall) before each and every
venture onto the track--just by applying the wrench and tightening them,
without loosening them first.   Oh, he was a Fast Guy all right.

We all rolled our eyes at this clown, and it came as no surprise when
towards the end of the afternoon, one of his wheels went arrowing off into
the
bushes in turn 9, broken studs scattered all over the track....

Mike
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