Water Pump: Service and Repair

Water Pump Replacement (LL8) (4.2L)

Special Tools

J 41240 Fan Clutch Remover and Installer

Removal Procedure

1. Drain the coolant. Refer to Cooling System Draining and Filling (LH6) (Cooling System Draining and Filling)Cooling System Draining and Filling (LL8) (Cooling System Draining and Filling).
2. Remove the fan and shroud. Refer to Cooling Fan and Shroud Replacement (Service and Repair).
3. Remove the drive belt. Refer to Drive Belt Replacement (Service and Repair).




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 (Water Pump Cleaning and Inspection).
10. Discard and replace the gasket.

Installation Procedure

1. Install a new water pump gasket.





Caution: Refer to Fastener Caution (Fastener Caution).

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

* On the initial pass, tighten the bolts to 4 Nm (35 in. lbs.).
* On the final pass, tighten the bolts to 10 Nm (89 in. lbs.).




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 and tighten to 25 Nm (18 ft. lbs.).
6. Remove the J 41240 .
7. Install the drive belt. Refer to Drive Belt Replacement (Service and Repair).
8. Install the fan and the shroud. Refer to Cooling Fan and Shroud Replacement (Service and Repair).
9. Fill the cooling system with the specified coolant and concentration. Refer to Cooling System Draining and Filling (LH6) (Cooling System Draining and Filling)Cooling System Draining and Filling (LL8) (Cooling System Draining and Filling).
10. Inspect for leaks.