Water Pump: Service and Repair
Water Pump Replacement (RPO LNJ) (3.4L)
Special Tools
J 39914 Serpentine Belt Tensioner Unloader
Removal Procedure
1. Drain the cooling system until the coolant is below the level of the water pump. Refer to Cooling System Draining and Filling (LY7 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LNJ GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LNJ Static Fill) (Service and Repair)Cooling System Draining and Filling (LY7 Static Fill) (Service and Repair).
2. Loosen the water pump pulley bolts (4).
3. Using the J 39914 rotate the drive belt tensioner (8) to release the tension on the drive belt.
4. Remove the drive belt from the right idler pulley (2).
5. Carefully release the J 39914 to relieve the drive belt tensioner spring tension.
6. Remove the J 39914 from the drive belt tensioner (8).
7. Remove the water pump pulley bolts (2).
8. Remove the water pump pulley (1).
9. Remove the water pump bolts (3).
10. Remove the water pump (1).
11. Remove the water pump gasket (2).
12. Clean the water pump mating surfaces.
Installation Procedure
1. Install the water pump gasket (2).
2. Install the water pump (1).
Caution: Refer to Fastener Caution (Fastener Caution).
3. Install the water pump bolts (3) and tighten to 10 Nm (89 lb in).
4. Install the water pump pulley (1). Loosely install the pulley bolts (2).
5. Insure the drive belt is properly centered on all the pulleys except the right idler puller (3).
6. Using the J 39914 rotate the drive belt tensioner away from the drive belt.
7. Install the drive belt to the right idler pulley (2).
8. Carefully release the J 39914 allowing the drive belt tensioner (8) to come in contact with the drive belt.
9. Remove the J 39914 from the drive belt tensioner (8).
10. Inspect the drive belt to insure the belt is properly centered on all the pulleys (1-8).
11. Tighten the water pump pulley bolts and tighten to 25 Nm (18 lb ft).
12. Fill the cooling system. Refer to Cooling System Draining and Filling (LY7 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LNJ GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LNJ Static Fill) (Service and Repair)Cooling System Draining and Filling (LY7 Static Fill) (Service and Repair).
13. Inspect the cooling system for leaks.