COMMON CAUSES OF ENGINE OVERHEATING
RADIATOR CAP Cross your fingers and hope this is the cause of your engine's overheating, because it's the cheapest and easiest fix. The radiator cap is designed to seal the radiator, allowing pressure to build up within the vehicle's cooling system. If it fails to create an air-tight seal, however, pressure will reduce, which in turn lowers the boiling point of coolant while subsequently rendering it ineffective at cooling the engine. THERMOSTAT The thermostat acts as a valve, opening and closing to either allow or prevent coolant to enter the engine. It performs this operation by measuring the temperature. When the engine becomes hot, the thermostat's valve opens. But it's not uncommon for old, worn-out thermostats to remain stuck in the closed position, restricting coolant from reaching the engine. RADIATOR Of course, another possible cause of engine overheating is a faulty radiator. Featuring fines and tubes, the radiator blows heat away from the engine. If it...