The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant throughout the engine and radiator, maintaining an optimal operating temperature. By preventing the engine from overheating, the water pump helps ensure efficient performance and longevity of the vehicle. Typically driven by the engine's crankshaft, the pump operates continuously while the engine is running. Signs of a failing water pump include coolant leaks, overheating, and unusual noises. Regular maintenance, including checking the coolant level and inspecting for leaks, can help keep the water pump functioning properly and avoid costly repairs.