The cooling system in an engine has five elements: the radiator, the radiator cap, the hoses, the thermostat and the water pump. We ought to mention a possible issue. Suppose you're installing a water pump on a car with a serpentine belt. Engines on many older models had been equipped with a typical V-belt, but the water pump for the old model might fit physically on the new 1. Can you guess the possible error? Believe about path: The serpentine belt may well drive the impeller in the opposite path from that of the V-belt, so you could finish up installing a pump that runs backward, causing a seemingly incurable overheating situation. Make confident you get specifically the appropriate portion, and compare the impellers. Also, heed that routing diagram.