ive had alot of the same problems with my 97 gt and i found a crack in the plastic tank on the driver side and what happens is when its not having proper pressure it boils , and for a quick fix i put 30 min epoxy on the crack and put a bottle of bars leak and knock on wood (knock knock) i havent had any issues with it going past 210 on the factory guage ... my other temp reads about 200 . Had to go for the rig cause i called advance auto and the radiator was like 260 bucks and kinda broke dont mix
