Water Pump Replacement 3.8L

1. Open the radiator drain cock. Drain the engine coolant to a level below the thermostat.
2. Close the radiator drain cock.

Tighten
Tighten the radiator drain cock to 1.5 N·m (13 lb in).

3. Loosen the water pump pulley bolts.
4. Remove the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.8L.
5. Remove the radiator inlet hose from the water pump.



6. Remove the water pump pulley bolts.
7. Remove the water pump pulley.



8. Remove the water pump bolts (1).
9. Remove the water pump (2).
10. Remove the water pump gasket (3).
11. Clean all of the gasket mating surfaces, including the water pump bolts.

Tools Required

J 36660-A Torque Angle Meter

1. Install a new water pump gasket (3).
2. Install the water pump (2).
3. Install the water pump bolts (1).

Tighten
Tighten the water pump bolts (1) to 15 N·m (11 lb ft). Use J 36660-A to torque the water pump bolts (1) an additional 80 degrees.




4. Connect the radiator inlet hose to the water pump.
5. Install the water pump pulley and the bolts.

Tighten
Tighten the water pump pulley bolts to 13 N·m (115 lb in).

6. Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.8L.
7. Add the engine coolant.
8. Start the engine. After the engine reaches normal operating temperature, check for coolant leaks.

Water Pump Replacement 5.7L

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



3. Disconnect the coolant fan electrical connectors.
4. Drain the cooling system. Refer to Cooling System Draining and Filling .
5. Lower the vehicle.



6. Disconnect the intake air temperature (IAT) sensor electrical connector.
7. Disconnect the mass airflow (MAF) sensor electrical connector.



8. Remove the air intake duct resonator.



9. Remove the outlet hose from the water outlet.



10. Remove the inlet hose from the coolant pump.



11. Remove the air cleaner bolts.
12. Remove the air cleaner / upper radiator support.



13. Remove the inlet hose (1) from the radiator.



14. Remove the electric engine coolant fans.
15. Remove the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 5.7L.



16. Remove the drive belt tensioner pulley from the coolant pump.



17. Remove the throttle body heater outlet hose from the radiator.



18. Remove the coolant pump bolts.



19. Remove the coolant pump.
20. Remove the coolant pump gaskets.
21. Clean all gasket mating surfaces, also clean the water pump bolts.

1. Install the coolant pump and gaskets to the engine block.



2. Install the coolant pump bolts.

Tighten
Tighten the coolant pump bolts to 30 N·m (22 lb ft).




3. Install the throttle body heater outlet hose to the radiator.



4. Install the drive belt tensioner to the coolant pump.

Tighten
Tighten the drive belt tensioner bolt to 50 N·m (37 lb ft).

5. Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 5.7L.



6. Install the electric engine cooling fans.



7. Install the inlet hose (1) to the radiator.



8. Install the air cleaner / upper radiator support.
9. Install the air cleaner bolts.

Tighten
Tighten the air cleaner bolts to 12 N·m (106 lb in).




10. Install the inlet hose to the coolant pump.



11. Install the outlet hose to the water outlet.



12. Install the air intake duct resonator.



13. Connect the IAT sensor electrical connector.
14. Connect the MAF sensor electrical connector.



15. Connect the coolant fan electrical connectors.



16. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
17. Refill the cooling system. Refer to Cooling System Draining and Filling .