Having a problem with overheating I have a 351w in a 93 mustang with a Mark VIII fan it's set on high speed only when it comes on, 185 thermostat, a 185 thermostat switch, the water pump is new the anti-freeze is seen going through the 3 core radiator, I also used the Spill-Free Funnel to make sure all the air was out of the cooling system . I check the head gasket with the block check fluid where if the blue fluid turns yellow the heads are blown and the fluid didn't change color. The car temp stays around 180-200 at idle, when I drove the car yesterday the car temp went up to 260 and it overheated and stalled the lower water pump hose looked like it was about to explode I also live Arizona where the temp was 116. Will going to 160 thermostat solve this problem, thanks
Last edited by kendell1; 06-14-2019 at 06:50 PM.