Water Pump Replacement LL8

Tool Required

J 41240 Fan Clutch Remover and Installer

1. Drain the coolant. Refer to Cooling System Draining and Filling .
2. Remove the fan and shroud. Refer to Cooling Fan and Shroud Replacement .
3. Remove the drive belt. Refer to Drive Belt Replacement .



4. Using the J 41240 , secure the water pump pulley and remove the water pump pulley bolts.
5. Remove the J 41240 .
6. Remove the water pump pulley.



7. Loosen and remove the water pump bolts.
8. Remove the water pump.
9. Clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection .
10. Discard and replace the gasket.

1. Install a new water pump gasket.

Notice: Refer to Fastener Notice in the Preface section.




2. Install the water pump and secure the water pump with the bolts.

Tighten

•	On the initial pass, tighten the bolts to 4 N·m (35 lb in).

•	On the final pass, tighten the bolts to 10 N·m (89 lb in).




3. Install the water pump pulley.
4. Install the water pump pulley bolts.
5. Using the J 41240 , secure the water pump pulley while tightening the water pump pulley bolts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

6. Remove the J 41240 .
7. Install the drive belt. Refer to Drive Belt Replacement .
8. Install the fan and the shroud. Refer to Cooling Fan and Shroud Replacement .
9. Fill the cooling system with the specified coolant and concentration. Refer to Cooling System Draining and Filling .
10. Inspect for leaks.

Water Pump Replacement LH6 and LS2

Tools Required

J 38185 Hose Clamp Pliers

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Loosen the air cleaner outlet duct clamps at the following locations:

•	Throttle body

•	Mass air flow (MAF)/intake air temperature (IAT) sensor

3. Remove the air cleaner outlet duct bolt and duct.
4. Remove the accessory drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Accessory for the 5.3L engine or Drive Belt Tensioner Replacement - Accessory for the 6.0L engine.
5. Remove the cooing fan and shroud. Refer to Cooling Fan and Shroud Replacement .



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



8. Using the 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 the J 38185 , reposition the throttle body hose clamp at the throttle body.
12. Remove the hose from the throttle body.
13. Using the 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. Remove the water pump bolts.
16. Remove the water pump and gaskets.
17. Discard the water pump gaskets.

Notice: Refer to Fastener Notice in the Preface section.





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

1. Install the water pump and NEW gaskets.
2. Install the water pump bolts.

Tighten

1. On the initial pass, tighten the bolts to 15 N·m (11 lb ft).
2. On the final pass, tighten the bolts to 30 N·m (22 lb ft).



3. Install the auxiliary heater inlet and outlet hose/pipe nut.

Tighten
Tighten the nut to 10 N·m (89 lb in).

4. Install the hose to the throttle body.
5. Using J 38185 , position the throttle body hose clamp at the throttle body.
6. Install the inlet and outlet hoses/pipes to the water pump.
7. Using J 38185 , position the auxiliary heater inlet and outlet hose/pipe clamps at the water pump.



8. Install the outlet hose to the water pump.
9. Using J 38185 , position the outlet hose clamp at the water pump.



10. Install the inlet hose to the water pump.
11. Using J 38185 , position the inlet hose clamp at the water pump.
12. Install the cooing fan and shroud. Refer to Cooling Fan and Shroud Replacement .
13. Install the accessory drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Accessory for the 5.3L engine or Drive Belt Tensioner Replacement - Accessory for the 6.0L engine.



14. Install the air cleaner outlet duct and bolt.

Tighten
Tighten the bolt to 10 N·m (89 lb in).

15. Tighten the air cleaner outlet duct clamps at the following locations:

•	Throttle body

•	MAF/IAT sensor

Tighten
Tighten the clamps to 7 N·m (62 lb in).

16. Fill the cooling system. Refer to Cooling System Draining and Filling .