A car's thermostat is a simple and straightforward device. But if it fails, it could lead to serious problems. Learn more ...

a thermostat valve that opens when the desired operating temperature is reached and a water pump (or coolant pump) to circulate coolant through the engine, hoses and other components. Most ...

The engine thermostat is a vital component of the ... manifold while others can be found attached to the water pump housing. Cooling issues can be troubling to diagnose at times.