Water Pump Replacement L61

J 43651 Water Pump Holding Tool

1. Drain the coolant. Refer to Cooling System Draining and Filling .
2. Remove the thermostat housing pipe-to-cylinder bolt near the front of the engine.



3. Remove the exhaust manifold heat shield and bolts.



4. Remove the water pump access plate from the front cover.
5. Remove the right hand wheel nuts and wheel assembly.
6. Remove the right hand inner push-pins and splash shield.



7. Disconnect the engine coolant temperature sensor electrical connector.




Important: A drain plug has been provided at the bottom of the water pump assembly for additional coolant drainage from the engine block and water pump.

8. Drain the coolant from the plug at the bottom of the water pump.



9. Remove the thermostat housing bolts.
10. Move the thermostat housing toward the left hand side of the vehicle while twisting the water feed pipe from the rear of the water pump assembly. Leave the coolant hoses and thermostat housing cover connected.
11. Remove the water feed pipe.
12. Discard the water pipe seals.




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

13. Install the J 43651 into position.
14. Tighten the bolts on the water pump holding tool into the threads on the water pump sprocket.
15. Install the access cover bolts that were removed earlier to secure the water pump holding tool to the front cover assembly.
16. Remove the 3  inner water pump sprocket to water pump blots.




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

17. Remove the 2  water pump assembly bolts.



18. Remove the rear 2  water pump assembly bolts.
19. Remove the water pump assembly and water pump O-ring seal.

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

1. Install a new water pump assembly seal.




Important: 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 assembly against the engine block and hand tighten the water pump bolts.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the inner water pump sprocket bolts. After 2 are snug, remove the guide pin and install the 3rd bolt.

Tighten
Tighten the water pump bolts to 25 N·m (18 lb ft).

5. Tighten the water pump socket bolts last.

Tighten
Tighten the water pump sprocket-to-water pump bolts to 10 N·m (89 lb in).




6. Remove the J 43651 .
7. Install the water pump access plate and bolts.

Tighten
Tighten the water pump access bolts-to-front cover to 10 N·m (89 lb in).

Important: The water feed pipe seals can be lightly lubricated with silicone gel to aid in assembly.

8. Install a new O-ring seal on the water feed pipe.



9. Install the thermostat housing to block seal onto the thermostat housing, if damaged.
10. Install the water feed pipe into the water pump assembly.
11. Align the water feed pipe to the thermostat housing assembly.
12. Seat the water feed O-ring seal by pushing and twisting toward the water pump. Take care not to tear or damage the O-ring.
13. The water feed pipe has a locating tab to assure proper alignment.
14. Position the thermostat housing against the engine. Be sure that the thermostat housing pipe is properly positioned against the support bracket near the front of the engine.
15. Install the thermostat housing to block bolts.

Tighten
Tighten the thermostat housing-to-block bolts to 10 N·m (89 lb in).




16. Connect the electrical connector to coolant temperature sensor.
17. Install the right hand inner splash shield and push pins.
18. Install the right hand tire assembly and wheel nuts.

Tighten
Tighten the wheel nuts to 125 N·m (92 lb ft).

19. Lower the vehicle.
20. Install the thermostat pipe bracket to cylinder head bolt.

Tighten
Tighten the thermostat pipe bracket-to-cylinder head bolt to 8 N·m (71 lb in).




21. Install the exhaust manifold heat shield.
22. Install the exhaust manifold heat shield bolts.

Tighten
Tighten the exhaust manifold heat shield bolts to 23 N·m (17 lb ft).

Important: The vehicle must be level when filling the cooling system.

23. Verify the drain valves at the radiator and water pump are closed.
24. Fill the engine coolant. Refer to Cooling System Draining and Filling .
25. Verify the repair and inspect for any leaks.

Water Pump Replacement LX9

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Loosen the water pump pulley bolts.
3. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.



4. Remove the water pump pulley bolts and pulley.
5. Remove the water pump bolts, pump, and gasket.
6. Clean the water pump mating surfaces.

1. Install the water pump gasket and pump (1).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the water pump bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).




3. Install the water pump pulley and bolt until snug.
4. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.5L.
5. Tighten the water pump pulley bolts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

6. Fill the cooling system. Refer to Cooling System Draining and Filling .
7. Inspect for leaks.