Quote:
Originally Posted by gpb
Not really any speculation, adding antiseize invalidates the torque value if the manufacturer didn't specify to use it. There *is* speculation as to whether it's needed or not, but I won't get into that as it's been a long time since I lived in the Rust Belt.
Torque is a measure of the sliding friction between the threads as you tighten the bolt. Add antiseize and you change the coefficient of friction, which means you risk over or under torquing the bolts if you go by the specified torque value.
If you must use something on the threads different from the manufacturer's specification, supposedly you can use the K values to figure the new/correct torque values. I'd be really cautious doing this and recheck torque periodically to avoid any unpleasant surprises.
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We use "never seize" all the time on our heavy equipment and that kinda became the norm ever time I had to do a brake job on our lite duty trucks and I've always used it on all of my cars and never had a failure.( but I do check my vehicles frequently ,& I've never noticed any " back off")Never seize or a little light grease is fine and won't affect you're torque specs enough to matter.What you're truly doing is "stretching" the thread between the nut and bolt.A thin coat of never seize isn't going to stop the threads from stretching. I'm sure there is a good argument for not doing this, but in my 25 + years of changing brakes and torquing wheels , I've never had any ill effects from using never seize.BUt as time has gone on there is more and more literature saying not to use it and its unnecessary and it can actually lead to premature wear. Manufacturing changes. Things change. You should
always do what the owners manual says. In my case its a old habits dying hard....and I'll admit it