We invite you to visit PumpReviews.net for basics of water pump. Water Pump continuously circulate engine coolant through the cooling system—from the radiator to the engine and then back again. If the water pump fails in this Sisyphean task the cooling system itself will fail to function. Your vehicle will run hot and possibly suffer serious damage from engine overheating. Some operate through a belt and pulley and others via a gear or chain. This power is transferred to a shaft on which there is an impeller. The impeller spins and circulates coolant in much the same way a propeller works on a boat or airplane to move water or air. The shaft and impeller spin on a sealed bearing, and this bearing is the part of a water pump that usually wears out.

The main warning sign a water pump that is about to give up the ghost will "bleed"— leak coolant. It may also make noise as its bearing is losing its way. A wet engine or a coolant weap through the vent under a water pump are also sure signs of impending water pump failure. Since a water pump is either working or not, replacement is a matter of necessity or preventive maintenance. If your water pump is leaking or quits altogether it obviously needs to be replaced.