I REPLACE THE RADIATOR SO IT COULDNT BE THAT, I REPLACE THE THERMASTAT SO IT COULDNT BE THAT,I REPLACED THE RADITOR CAP ( FROM KRAGENS) I BOUGHT A NEW MOTOR FOR MY COOLING FANS SO I DONT THINK ITS THAT. THE FANS DO WORK. WHEN I DRIVE 30MPH AND UNDER IT OVER HEATS DUNNO WHY I REPLACED MY FANS AND THEY ARE ON WHEN I DRIVE. WHEN I DRIVE 45 OR MORE THE CAR DOESN OVERHEAT THE TEMP GOES BACK DOWN WHEN I GO FAST. I CHECK TO SEE IF THERE IS A BIG CLOUD OF WHITE SMOKE WHEN I TURN THE CAR ON AND THERE ISNT BUT IT SMELLS BAD.. I CHECKED MY SPARK PLUGS AND IN SIDE WAS NORMAL. SO IF IT WAS NORMAL IT COULDNT BE THE HEAD GASKET RIGHT???? IM CLUELESS