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Torque method questions
In industrial applications, I rarely came across a situation where dry-torque was required (Like for Titanium)
Accepted procedure was to have a lubricant not only on the threads, but also on the bearing/sliding surfaces like on the flat-washers and underneath the nut. Of course, on rod bolts, the lubricant is the thread locker. Wayne, in his Engine-Rebuild-Book, uses what he calls "Nonstatic Torque" meaning steady turning until the torque wrench clicks. I also remember "Torque value plus an additional segmented turn", like: Torque plus 1/4 turn. This method of setting the torque, and then tightening an additional amount, was applied under high heat to large-size bolts on turbines. Where, on a 911-engine, is the "Torque plus ?turn" to be found? :confused: |
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