The water pump is a vital component of a car's cooling system, responsible for circulating coolant throughout the engine and radiator. By maintaining an optimal temperature, it prevents the engine from overheating and ensures efficient performance. Typically driven by the engine's crankshaft via a belt or chain, the water pump operates continuously while the engine is running. Signs of a failing water pump include coolant leaks, unusual noises, and overheating. Regular maintenance, such as checking coolant levels and inspecting for leaks, can help extend the life of the water pump and keep the engine running smoothly.