The water pump is a vital component of a car's cooling system. Its primary function is to circulate coolant through the engine and radiator, preventing overheating. The pump is typically driven by the engine's crankshaft via a belt or chain. As the engine runs, the water pump ensures that coolant absorbs heat from the engine and releases it through the radiator. Regular maintenance is essential, as a failing water pump can lead to engine damage due to overheating. Signs of a malfunction include coolant leaks, unusual noises, or an overheating engine. Timely replacement can ensure optimal engine performance and longevity.