The water pump is a crucial component of a vehicle's cooling system. Its primary function is to circulate coolant throughout the engine and radiator, preventing overheating. When the engine runs, the water pump draws coolant from the radiator and pushes it through the engine, absorbing heat. This cooled liquid then returns to the radiator, where it releases heat into the air. A well-functioning water pump ensures optimal engine performance and longevity. Signs of a failing water pump include coolant leaks, overheating, and unusual noises. Regular maintenance and timely replacement can help avoid serious engine damage and maintain vehicle efficiency.