Quote Originally Posted by gtpinsc View Post
dude ... did u burp the coolant system with the bleeder valves? sounds like thats ur prob... theres screws right by top hose that u loosen up to let air out.... basically loosen screw.. start car and let it warm up... add coolant through radiator as needed... repeat this a few times. to get all the air out of the system.
THIS.

I blew a rad hose, and when I replaced it I did not know about the bleeder screw, and I had problems with the temp jumping up and down. after reading about it on this awsome site, I bled the line (many times) and it runs perfect now.