Can a car overheat only after driving on the highway?
Can a car overheat only after driving on the highway? Overheating only after driving on highway for while and t... Q: Overheating only after driving on highway for while and the driver side heater won't work. I have replaced thermostat, radiator cap and ECT. What causes a car to overheat without a water pump? Pop the hood of the vehicle and look for pulleys without a belt on them. The serpentine belt is responsible for turning the water pump and other engine accessories like your alternator. If this belt breaks, the water pump will not turn, which causes the coolant...