Although I just read that you found a crack.......and that was probably your problem........BUT a common problem, not with EVERY stang, but SOME just won't run cool with a 160 degree stat and the reason is that the coolant never has a chance to stay in the radiator to be cooled, it, the coolant, is circulated constantly.....thus overheating.
A crack should show up as the gauge creeping up and down its range, similar to a LOW coolant level.
One of my favorite topics.....let me know how you make out....email me at
gtsr515@yahoo.com.......GOOD LUCK!!!!!!!!!!
Jay
