The water pump’s main purpose is to regulate the temperature in the engine. The waterpump is part of the cooling system of the car like the radiator or the thermostat.
In general the engine water pump is a centrifugal pump operated by the timing belt. The latter helps to distribute of cooling liquid throughout the engine. The cooling fluid in the engine exits the water pump and flows through the engine block and the cylinder head. It then continues through the radiator before it flows back to the water pump.
