The first step to change the Water Pump on 4.8l, 5.3l, and 6.0l engines involves emptying the cooling system. Detach the clamps from air cleaner ducts at
Throttle Body and maf/iat sensor to remove the radiator inlet hose clip from outlet duct and take out the air cleaner outlet duct. Separate the engine sight shield and the radiator vent inlet hose from their clips if necessary. Affix the hose clamp on the Water Pump inlet then disconnect both the water inlet hose and Fan Blade. Insert the outlet hose clamp at the Water Pump and take off the outlet hose. Then slide the clamp onto the surge tank outlet and disconnect the hose. Supplant these steps with the heater inlet tube before loosening the Water Pump supports to extract the Water Pump and gasket units which you must discard. Install the Water Pump with fresh gaskets since there should be no oil or foreign material on its surfaces. Put new gaskets into the Water Pump and reattach all Water Pump bolts. Start tightening the bolts at 15 nm then at 30 nm. Put back the heater inlet hose and its clamp first and follow with the surge tank outlet hose and its clamp then the outlet hose and damage-free clamp. Fasten the belt and Fan Blade before connecting the inlet tube and securing its clamp. Place the engine vent intake hose back on the radiator hose mounts before reinstalling any necessary engine sight shield and attaching the air cleaner outlet system. Keep the arrow on the Throttle Body end lined directly with the Throttle Body base piece. After setting the radiator inlet hose clip on the outlet duct commence clamping the air cleaner outlet duct at the Throttle Body and maf/iat sensor at 7 nm (62 inch lbs.).