Chevy Blazer S-10

88 S-10 BLAZER water pump works but on warm days it runs at 220 and with the air on runs at 240 but wont overheat why?



User Avatar
Wiki User

When the right proportions of water and anti-freeze are used, it increases the boiling point of the radiator liquid to about 260° F. Running at 240 though seems awfully high ... possibly related to the thermostat just above the water pump.