To replace the water pump, you will need to drain the radiator, loosen the alternator adjusting bolts, push the alternator toward the engine, and remove the drive belt. Once the water pump is removed, you can reinstall it. Loosen the cooling system bleed valve located on the thermostat housing and fill the radiator with coolant. Once the coolant stops bubbling, close the valve. Start the engine and set the heater temperature control lever to a high position. Let the engine run for about 10 minutes, then open the bleed valve again. Allow coolant to drain from the bleed valve until air bubbles disappear, and close the valve. Then refill the radiator.