The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant throughout the engine, ensuring it operates at the optimal temperature. By moving coolant from the radiator to the engine and back, the water pump helps prevent overheating, which can lead to severe engine damage. Typically driven by the engine's crankshaft, the water pump consists of a rotor and a housing that creates pressure to move the coolant. Regular maintenance, including checking for leaks and ensuring proper function, is essential for the longevity of the engine and overall vehicle performance.