Water Pump: Service and Repair
WATER PUMPREMOVAL-SRT
1. Remove the engine cover. Grasp both corners of the engine cover and pull up firmly.
2. Drain the cooling system.
3. Remove the radiator fan.
4. Remove the air pump tube retaining bolts (2).
5. Remove the air pump tube assembly from the engine (1).
6. Rotate the belt tensioner counterclockwise and release the tension on the accessory drive belt.
7. Remove the accessory drive belt from the pulleys.
8. Carefully release the wrench tension on the belt tensioner.
9. Remove the supercharger idler pulley upper retaining bolt (1) and lower retaining bolt (2).
10. Remove the supercharger idler pulley.
11. Remove the accessory drive belt from the engine.
12. Remove the belt tensioner pulley and the belt tensioner.
13. Disconnect the lower radiator hose (2).
14. Disconnect the coolant by-pass hose (1).
15. Remove the generator.
16. Remove the water pump pulley (2).
17. Remove the accessory drive belt idler pulley (1).
18. Relocate the oil cooler hose (3) clamp.
19. Remove the water pump retaining bolts.
20. Remove the water pump from the engine. Remove the oil cooler hose (3) from the water pump to the oil cooler tube.
INSPECTION
Note: It is normal for the water pump to weep a small amount of coolant from the weep hole (black stain on water pump body). Do not replace the water pump if this condition exists. Replace the water pump if a heavy deposit or a steady flow of engine coolant is evident from the weep hole. This indicates a shaft seal failure and pump must be replaced. Be sure to perform a thorough analysis before replacing water pump.
Inspect and replace the water pump if it has any of the following defects:
1. Damage or cracks on the pump body (1).
2. Coolant leaks; if the seal is leaking, this will be evident by traces of thick deposits of dried coolant draining from the pump weep hole. A thin black stain below pump weep hole/passage is considered normal operation (2).
3. Impeller rubs against the engine front cover (3).
4. Excessively loose or rough turning bearing (3).
INSTALLATION - SRT
1. Clean all gasket surfaces.
2. Position the water pump with a new gasket on the timing chain cover.
3. Install the water pump bolts in the correct positions. Tighten the bolts to 35 Nm (26 ft. lbs.).
4. Install the oil cooler hose (3) to the water pump.
5. Install the hose clamp.
6. Install the water pump pulley (2) and bolts. Tighten the water pump pulley bolts to 10 Nm (89 inch lbs.).
7. Install the idler pulley (1) and bolt. Tighten the idler pulley bolt to 10 Nm (89 inch lbs.).
8. Connect the lower radiator hose (2) and coolant by-pass hose (1).
9. Install the generator.
10. Rotate the belt tensioner counterclockwise and install the accessory drive belt.
11. Release the belt tensioner and remove the wrench.
12. Install the air pump tube assembly (1) to the engine.
13. Install the radiator fan.
14. Install the engine cover (1). Align the engine cover retaining clips to the rubber mounts, and push down firmly to connect engine cover to rubber mounts.
Note: To ease the installation of the engine cover, apply a small amount of lubricant to the engine cover rubber mounts.
15. Connect the negative battery cable.
16. Fill the cooling system.
17. Start the engine and check for coolant leaks.
18. Recheck the coolant level.