[greg bradbury]

Red loctite is for studs and blue is for the nuts. The rational is that if you put red on the stud and blue on the nut when you come to the time to disassemble the nut will come off without the stud backing out. Since the nut on the head bolt isn't loctited the stud can go in with blue or red and there shouldn't be a problem with the stud backing out.
That's the way I see it anyway.
Regards,
Greg