The water pump is a crucial component of a vehicle's cooling system. Its primary function is to circulate coolant throughout the engine, maintaining optimal operating temperatures. By pushing coolant from the radiator to the engine and back, the water pump prevents overheating, which can cause severe engine damage. Typically driven by the engine's serpentine belt, the water pump operates continuously while the engine runs. Signs of a failing water pump include coolant leaks, unusual noises, and engine overheating. Regular maintenance and timely replacement of the water pump can help ensure the longevity and efficiency of the vehicle's engine.