Why does your 1990 Corvette overheat?

Answer 1

pressure test cooling system make sure no leaks and full coolant tank, next make sure electric fan cycles on when temp gets high if its running at 235 degrees and fan does not spin check fan relay and fan motor, check for stuck thermostat with engine at normal running temp about about 225 feel the upper and lower radiator hoses if one is cold and ond is hot thermostat is not opening. check oil dip stick if oil looks like white milk or white heavy smoke come out tailpipe and loosing coolant its a headgasket problem. if car only heats up at highway speeds check for a missing front airdam under the front bumper this is a important part as it deflects air to the radiator if missing the air does not reach radiator, one other problem I ran into was a pile of leaves was sucked up and blocked the front of the radiator its hard to spot because the ac condenser is in front of radiator with only a few millimeters between them. make sure that fan is kicking on!!!!