Water Pump: Service and Repair

REMOVAL
The water pump can be replaced without discharging the air conditioning system.

WARNING: DO NOT REMOVE PRESSURE CAP WITH THE SYSTEM HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM COOLANT CAN OCCUR.

1. Drain cooling system.
2. Remove engine timing belt.





3. Remove water pump mounting bolts.
4. Remove water pump body from engine.

INSPECTION
Replace the water pump if it has any of the following defects:
^ Damage or cracks on the pump body.
^ Coolant leaks; if the seal is leaking, this will be evident by traces of thick deposits of greenish-brown dried glycol running down the pump body and components below. A thin black stain below pump weep hole is considered normal operation.
^ Impeller rubs inside of timing belt cover.
^ Excessively loose or rough turning bearing.

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 green/brown engine coolant is evident on water pump body from the weep hole (shaft seal failure). Be sure to perform a thorough analysis before replacing water pump.

INSTALLATION
1. Clean all O-ring surfaces on pump and cover.





2. Install new O-ring on water pump. Lubricate O-ring with synthetic grease to facilitate assembly.
3. Install water pump mounting bolts and tighten to 12 Nm (105 inch lbs.).
4. Install timing belt.
5. Fill cooling system.