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, ensuring that the engine operates at the optimal temperature. When the engine runs, the water pump draws coolant from the radiator and pushes it through the engine block and back to the radiator. This process helps prevent overheating and maintains engine efficiency. A malfunctioning water pump can lead to severe engine damage, so regular maintenance and timely replacement are essential. Signs of a failing water pump include coolant leaks, unusual noises, and overheating.