Water Pump: Service and Repair

Water Pump Replacement (LNF)

Special Tools

J 43651 Water Pump Holding Tool

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Remove the right engine splash shield. refer to Engine Splash Shield Replacement - Right Side (Engine Splash Shield Replacement - Right Side).




3. Remove the bolts (1) retaining the water pump access plate (2) and remove the plate from the front cover (3). Discard the seal.
4. Drain the coolant from the water pump using the plug at the bottom of the pump. Refer to Cooling System Draining and Filling (Static Fill LE5, L61) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (Static Fill LNF) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (GE 47716 Fill) (Cooling System Draining and Filling (GE 47716 Fill)).
5. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LNF) (Service and Repair).




6. Remove the radiator outlet pipe from the rear of the water pump and the thermostat housing by gently twisting.





Note: The water pump holding tool supports the sprocket and chain during water pump service. The tool must be used or the balance shaft will have to be re-timed.

7. Install the J 43651 (1) into position.
8. Tighten the bolts on the water pump holding tool (2) into the threads on the water pump sprocket.
9. Install the access cover bolts that were removed earlier to secure the water pump holding tool to the front cover assembly.
10. Remove the three inner water pump sprocket to water pump bolts.





Note: Be sure to remove both front water pump bolts from the front of the engine block.

11. Remove the two front water pump bolts.




12. Remove the two rear water pump bolts.




13. Remove the water pump.
14. Remove and discard the water pump O-ring seal.

Installation Procedure





Note: Prior to installing the water pump, read the entire procedure. This will help avoid balance shaft chain re-timing and ensure proper sealing.

1. Install a NEW water pump O-ring seal.

Note: A guide pin can be created to aid in water pump alignment. Use a M 6 m x 6 mm stud. Thread the pin into the water pump sprocket.

2. Using the guide pin, align the pin with the water pump holding tool.
3. Position the water pump against the engine block and hand tighten the front and rear water pump bolts.

Caution: Refer to Fastener Caution (Fastener Caution).

4. Install the inner water pump sprocket bolts. After two bolts are snug, remove the guide pin and install the 3rd bolt.

* Tighten the front and rear water pump bolts to 25 Nm (18 lb ft).
* Tighten the water pump sprocket bolts to 10 Nm (89 lb in).




5. Remove the J 43651 (1).




6. Install the water pump access plate and bolts, with a NEW seal and tighten the bolts to 10 Nm (89 lb in).




7. Install the radiator outlet pipe to the rear of the water pump and the thermostat housing using new O rings.
8. Install the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LNF) (Service and Repair).
9. Install the right engine splash shield. refer to Engine Splash Shield Replacement - Right Side (Engine Splash Shield Replacement - Right Side).
10. Lower the vehicle.
11. Refill the coolant system to specifications and inspect for leaks. Refer to Cooling System Draining and Filling (Static Fill LE5, L61) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (Static Fill LNF) (Cooling System Draining and Filling (Static Fill))Cooling System Draining and Filling (GE 47716 Fill) (Cooling System Draining and Filling (GE 47716 Fill)).