Automotive water pumps

Automotive water pumps are impeller pumps that are used in the engines of cars, trucks, and other vehicles to circulate cooling fluid within the water jacket of combustion engines. These pumps serve to move cooling fluid through a closed system so that the engine does not overheat and to pump the circulating fluid to a radiator that drops the coolant temperature by passing the heat to the air. While known colloquially as water pumps, the cooling fluid used in automotive engines is a mixture of water with a glycol-based product that raises the boiling point and lowers the freezing point of the fluid.