not sure, but why not use hi-temp thread lock
Loctite 2422 Ultra High Temperature, Medium Strength Blue Threadlocker
http://www.henkelna.com/product-sea...tredDotUID=productfinder&redDotUID=0000000NBG
that stuff isn't strong enough. in the past, I've used the high temp red loctite.
We used this at the field, and let it set for 24 hours. it wasn't enough.
http://www.all-spec.com/products/59235.html?gclid=CMLTiLaR2r4CFXMA7AodtiMA_A
how about teflon tape?
unnecessary.
I and some guys I fly with have had great luck with pre-heating the engine before tightening the bolts.
But now that my threads are worn.... Anything I can do to avoid removing the engine?
Yes, you could install Helicoils.