Pump, Water: Removal: 3.6L
The water pump on 3.6L engines is bolted directly to the engine timing chain case cover.
- Disconnect and isolate the negative battery cable.
- Drain the cooling system. Refer to DRAINING .
- Remove the accessory drive belt. Refer to BELT, SERPENTINE, REMOVAL .WARNING:
Constant tension hose clamps are used on most cooling system hoses. When removing or installing, use only tools designed for servicing this type of clamp. Always wear safety glasses when servicing constant tension clamps.
CAUTION:A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.
- Remove the lower heater hose (1) from the water pump.
- Remove the lower radiator hose (3) from the water pump.
- Remove the idler pulley (4). Refer to PULLEY, IDLER, REMOVAL .
- Remove the water pump (1) mounting bolts taking notice of the water pump M6 bolts (2) that bolt directly to the timing cover.CAUTION:
Do not pry on the water pump at the timing chain case/cover. The machined surfaces may be damaged resulting in leaks.
- Remove the water pump and DISCARD the gasket.
INSPECTION:
Inspect and replace the water pump if it has any of the following:
- Damage or cracks on the pump body.
- 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.
- 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.
- Impeller rubs inside of cylinder block.
- Excessively loose or rough turning bearing.