Ant Sieze on wheels nuts/bolts
colin cohen
ccohen5 at compuserve.com
Wed Jun 27 10:54:46 EDT 2001
Are we not mixing the proverbial apples and oranges in this revisited
discussion. The OEM assumes that the average owner:
- may not torque correctly, replace the bolts/nuts clean, remove the wheels
between tire replacements, check torque or even tightness.
So its hardly surprising that no one recommend an agent that could aid the
loosening/backing of a fastener.
A Qlister probably is meticulous about torque, checks at 50 miles, replaces
the fastener clean and uncontaminated by road dirt, changes wheels with
their clothes etc etc. This makes anti-seize unnecessary but probably makes
no difference.
But with that said, I am told by my fastener OEM buddies that torque calcs
are made dry, and have to be as each type of anti seize compound has a
different viscosity which alters the degree of grip by the threads and hence
the torque. So in choosing say 85 ft lbs for wheel fasteners with anti
seize we are not adopting the factory OEM spec for torque. What should it
be with anti seize? - I asked. Who knows was the response. All Mil-spec
tests are done at greater than 5 X the spec torque dry.
Food for thought?
Colin
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