Heat Exchanger to head nut torque Options

[jmalone]

Can anyone confirm the torque figures for the heat exchanger to head nuts? I have initial torque at 7.3 ft/lb and final torque at 24.5 ft/lb.

[Tom]

By using anti-seize on the threads, you have now made the dry torque figures no longer applicable. Google wet versus dry torque numbers to understand. Example, a dry torque required of 20 ftlbs being applied to a wet thread will yield about 25-28 ftlbs of actual torque, resulting in an over-torqued fastener.
Better yet, just do as Jeff said and torque only until the HE's seal.
Tom

[cary]

By using anti-seize on the threads, you have now made the dry torque figures no longer applicable. Google wet versus dry torque numbers to understand. Example, a dry torque required of 20 ftlbs being applied to a wet thread will yield about 25-28 ftlbs of actual torque, resulting in an over-torqued fastener.
Better yet, just do as Jeff said and torque only until the HE's seal.
Tom

I always wondered about that. Things that make you go Hmmmmm.

I too use anti-seize. But I'm more like Jeff, I do it by feel.
I use a 1/4" torque wrench and start at 10, then 12, then 14. But I'm focused on the the feel not the click. But I guess I don't really know what I end up with.

The first time I backed a stud out of the 3.2 in my 911 it scared the crap out of me.
I've used anti-seize every sense.

Maybe I'll stop by Rothsport and pick Jeff's brain on the anti-seized exhuast nut torqued value.