Why A Water Pump Fails
Water pumps don’t gradually wear out; a water pump fails. In other words, they’re either working or they’re not. A failed water pump has to be replaced.
Water pumps can fail in two ways: they can spring a leak or their bearings fail. Leaks can come from a cracked pump but usually develop at the gasket where the pump attaches to the engine.
Water pumps are part of a larger system. It is similar to the circulatory system in your body and keeps the anti-freeze moving through the radiator. Combined with your belt and hose system, your water pump keeps the blood flowing in your car, cooling your engine when combined with he fans in front of your radiator.