[john]

I heard of it, just never used locktite for it. I will have to check the temp rating of it at work tomorrow. If you used it and they still have backed out, seems to me that the locktite has no affect. I always:

Blow the holes out
retap with thread cutting oil
blow them out again
screw studs all the way to the bottom
use ARP lube and torque to 90 lbs

Never blown one. I have had a stud come out while removing the head again but I always clean the holes out and do the process above again whenever I have the head off no matter if they came out or not.