Pump, Water: Inspection: 5.7L/6.4L

1. Disconnect and isolate the negative battery cable.
2. Remove the air cleaner body. Refer to BODY, AIR CLEANER, REMOVAL, 5.7L or BODY, AIR CLEANER, REMOVAL, 6.4L .
3. Remove the resonator mounting bracket.
4. Remove the cooling fan assembly. Refer to FAN, COOLING, REMOVAL .
5. Drain the cooling system. Refer to DRAINING .

   Courtesy of CHRYSLER GROUP, LLC

6. Remove the serpentine belt. Refer to BELT, SERPENTINE, REMOVAL .
7. Remove the heater tube retaining bolt (1) and remove the heater tube (3) from the water pump.
8. Disconnect the Engine Coolant Temperature (ECT) sensor wire harness connector (2).

   Courtesy of CHRYSLER GROUP, LLC

9. Remove the upper radiator hose from the thermostat housing (1) and position aside.
10. Remove the pulley bolt and remove the idler pulley (5).
11. Remove belt tensioner assembly (4). Refer to TENSIONER, BELT, REMOVAL .
12. Remove the lower radiator hose from the water pump and position aside.
13. Remove the upper stud bolt (2).
14. Remove the water pump mounting bolts (6) and carefully remove the pump (3) from the cover while removing the metal bypass tube.

INSPECTION: 

Inspect and replace the water pump if it has any of the following:

1. Damage or cracks on the pump body.
2. Coolant leaks: If the shaft seal is leaking, this will be evident by traces of thick deposits of dried glycol running down from the pump primary weep passage. A thin black stain below the pump primary weep hole/passage is considered normal operation.
3. Coolant leaks: If the pump primary weep passage is plugged, coolant may come from the secondary weep passage and collect in the valley of the engine. The coolant will eventually run out the back side of the engine. Leakage from the secondary weep passage may give false indications that core plug(s) may be leaking on the back side of the engine block. If this condition is found, clean the primary weep passage of debris.
   NOTE:

   It is normal for the water pump to weep a small amount of coolant from the primary weep hole (black stain at weep passage). 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 primary weep passage. This indicates a shaft seal failure and pump must be replaced. Coolant may leak from the secondary weep passage and fill the valley of the engine. If this condition is found, clean the primary weep passage of debris. Be sure to perform a thorough analysis before replacing water pump.

4. Impeller rubs inside of cylinder block.
5. Excessively loose or rough turning bearing.