Begin replacement of the Water Pump by disconnecting the battery negative cable before taking off the air cleaner assembly and draining the engine cooling system. You must first take off the air intake duct from the
Throttle Body then unplug the coolant recovery reservoir plus detach the upper
Fan Shroud. Take out the
Drive Belt and
Fan Clutch unit from the vehicle engine. First take off the Water Pump Pulley bolts and pulley but keep connecting the radiator and heater hoses and bypass hose to the Water Pump. Pull off the Water Pump bolts before pulling out the Water Pump assembly with its gasket. Examine and clean both engine block and Water Pump mounting bolt areas before testing their thread strength. Place the gasket and the water coolant pump over the bolts then apply teflon pipe sealant gm p/n 12346004 or equivalent as a sealant on each Water Pump mounting bolt. Tighten the bolts to a torque value of 42 nm (31 ft. Lbs.). Connect the Water Pump, heater outlet, and radiator outlet hoses. Then put the Water Pump Pulley and its bolts in place and perform a torque of 25 nm (18 ft. Lbs.). Put back the Drive Belt, fan clutch, upper Fan Shroud, coolant recovery reservoir, air intake system and air filter assembly. Close the process by hooking up the negative
Battery Cable to its terminal connection. After filling the engine coolant system you need to remove air from it then check for any fluid leakage.