The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant throughout the engine, preventing it from overheating. By drawing coolant from the radiator and pushing it through the engine block, the water pump helps maintain an optimal operating temperature. Typically driven by the engine's serpentine belt, a malfunctioning water pump can lead to severe engine damage due to overheating. Regular maintenance, such as checking for leaks and ensuring proper belt tension, is essential for the longevity of the water pump and the overall health of the vehicle's engine.