2 of the bolts came loose on my AC compressor which caused the Serpentine belt to come off.. I'm going to put the bolts back in, but what type of lock-tile would you recommend for the bolt? There's a variety of strengths and some made to withstand heat.

 

I just over-tightened mine. the blue loctite should be good enough

 

I used the blue loctite and so far, so good. thanks.