Water Pump Replacement

Water Pump Replacement (5.3L Engine)

Tools Required
^ J 38185 Hose Clamp Pliers

Removal Procedure
1. Drain the cooling system.





2. Loosen the air cleaner outlet duct clamps at the following locations:
^ Throttle body
^ Mass airflow/intake air temperature (MAF/IAT) sensor
3. Remove the air cleaner outlet duct bolt and duct.
4. Remove the accessory drive belt.
5. Remove the cooing fan and shroud.





6. Using J 38185, reposition the inlet hose clamp at the water pump.
7. Remove the inlet hose from the water pump.





8. Using J 38185, reposition the outlet hose clamp at the water pump.
9. Remove the outlet hose from the water pump.





10. Remove the auxiliary heater inlet and outlet hose/pipe nut.
11. Using J 38185, reposition the throttle body hose clamp at the throttle body.
12. Remove the hose from the throttle body.
13. Using J 38185, reposition the auxiliary heater inlet and outlet hose/pipe clamps at the water pump.
14. Remove the inlet and outlet hoses/pipes from the water pump.





15. Disconnect the auxiliary heater inlet and outlet hoses/pipes from the heater water shutoff valve.
16. Remove the auxiliary heater inlet and outlet hoses/pipes.





17. Remove the water pump bolts.
18. Remove the water pump and gaskets.
19. Discard the water pump gaskets.

Installation Procedure

Important: All gaskets surfaces are to be free of oil or other foreign material during assembly.





1. Install the water pump and NEW gaskets.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the water pump bolts.
2.1. Tighten the bolts a first pass to 15 Nm (11 ft. lbs.).
2.2. Tighten the bolts a final pass to 30 Nm (22 ft. lbs.).





3. Install the auxiliary heater inlet and outlet hoses/pipes.
4. Connect the auxiliary heater inlet and outlet hoses/pipes to the heater water shutoff valve.





5. Install the auxiliary heater inlet and outlet hose/pipe nut.
^ Tighten the nut to 10 Nm (89 inch lbs.).
6. Install the hose to the throttle body.
7. Using J 38185, position the throttle body hose clamp at the throttle body.
8. Install the inlet and outlet hoses/pipes to the water pump.
9. Using J 38185, position the auxiliary heater inlet and outlet hose/pipe clamps at the water pump.





10. Install the outlet hose to the water pump.
11. Using J 38185, position the outlet hose clamp at the water pump.





12. Install the inlet hose to the water pump.
13. Using J 38185, position the inlet hose clamp at the water pump.
14. Install the cooing fan and shroud.
15. Install the accessory drive belt.





16. Install the air cleaner outlet duct and bolt.
^ Tighten the bolt to 10 Nm (89 inch lbs.).
17. Tighten the air cleaner outlet duct clamps at the following locations:
^ Throttle body
^ MAF/IAT sensor
^ Tighten
^ Tighten the clamps to 7 Nm (62 inch lbs.).
18. Fill the cooling system.