The water pump is a crucial component of a vehicle's cooling system. Its primary function is to circulate coolant from the engine to the radiator and back, ensuring that the engine operates at an optimal temperature. When the engine runs, the water pump uses a belt connected to the crankshaft to create a flow of coolant. This helps prevent overheating, which can cause severe engine damage. Regular maintenance of the water pump is essential, as a failure can lead to coolant leaks or engine overheating. Signs of a failing water pump include unusual noises, leaks, or an overheating engine.