For my two cents. I was hella stressed after my car started to boil over. I checked HG. checked studs to see if the were torqued well. Turns out after a dozen post's and alot of denial it was in fact ........ A torn seal on my rad cap from the screw in stud for the coolant over flow bottle. Fixed that and went on a 500 mile drive over two montain passes with air temps of 106 to 119 with my temp guage reading 180 ..... Thanks Jdub for your time on that one