The water pump is a crucial component of a vehicle's cooling system. Its primary function is to circulate coolant from the radiator through the engine and back, ensuring that the engine operates at an optimal temperature. By maintaining this temperature, the water pump helps prevent overheating, which can lead to severe engine damage. Typically driven by the engine’s crankshaft via a belt, the water pump can wear out over time. Signs of a failing water pump include coolant leaks, unusual noises, and engine overheating. Regular maintenance and inspections can help ensure the water pump functions efficiently, prolonging the life of the engine.