Water Pump Replacement

Water Pump Replacement (LAT and LE5)

Tools Required

- J 43651 Water Pump Holding Tool

Removal Procedure

1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement Service and Repair.
2. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement Service and Repair.






3. Remove the water pump access plate from the front cover.






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.

4. Drain the coolant from the water pump using the plug at the bottom of the pump.






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.

5. Install the J 43651 into position.
6. Tighten the bolts on the water pump holding tool into the threads on the water pump sprocket.
7. Install the access cover bolts that were removed earlier to secure the water pump holding tool to the front cover assembly.






8. Remove the 3 inner water pump sprocket to water pump blots.






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

9. Remove the 2 water pump bolts (1).






10. Remove the rear 2 water pump bolts.






11. Remove the water pump.






12. If replacing the water pump, remove the water pump rear cover bolts (1) and nut (2).
13. Remove and discard the water pump O-ring seal.

Installation Procedure

Important: 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.

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. If replacing the water pump, transfer the rear water pump cover (3) to the NEW water pump and tighten the bolts (1) and nut (2) to 25 Nm (18 lb ft).






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.

3. Using the guide pin, align the pin with the water pump holding tool.






4. Position the water pump against the engine block and hand tighten the water pump bolts (1).






5. Install 2 inner water pump sprocket bolts (1). After the 2 bolts are snug, remove the guide pin and install the 3rd bolt and tighten to 25 Nm (18 lb ft).






6. Tighten the rear water pump bolts (1) to 10 Nm (89 lb in).






7. Remove the J 43651.






8. Install the water pump access plate and bolts. Tighten to 10 Nm (89 lb in).
9. Install the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement Service and Repair.
10. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement Service and Repair.