Tools Required

Caution: Do not use or attempt to repair a damaged cooling fan assembly. Replace damaged fans with new assemblies. An unbalanced cooling fan could fly apart causing personal injury and property damage.

1. Remove the air cleaner and the duct. Refer to the appropriate procedure:

•	Air Cleaner Assembly Replacement in Engine Controls - 4.3L

•	Air Cleaner Assembly Replacement in Engine Controls - 5.0L and 5.7L

•	Air Cleaner Assembly Replacement in Engine Controls - 6.5L (L65)

•	Air Cleaner Assembly Replacement in Engine Controls - 8.1L

2. Remove the coolant recovery reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Radiator Surge Tank Replacement .
3. Remove the upper radiator shroud from the radiator. Refer to Fan Shroud Replacement .



4. Remove the fan clutch assembly on the 4.3L, 5.0L, 5.7L and 8.1L using the J 41240 . Use the prongs of the J 41240-1 in the holes of the water pump pulley.
5. Remove the fan clutch assembly on the 6.5L using the J 41240-5A . Use the prongs of the J 41240-1 in the holes of the water pump pulley.



6. Remove the retaining bolts from the fan and clutch.
7. Remove the fan from the clutch.

1. Install the fan to the clutch.




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 retaining bolts to the fan and clutch.

Tighten

•	Tighten the 4.3L, 5.0L, 5.7L , and the 8.1L fan to clutch bolts to 33 N·m (24 lb ft).

•	Tighten the 6.5L diesel fan to clutch bolts to 17 N·m (13 lb ft).




3. Install the fan and clutch on the 4.3L, 5.0, 5.7L, and the 8.1L using the J 41240 .

Tighten
Tighten the fan clutch nut to 57 N·m (42 lb ft).

4. Install the fan and clutch on the 6.5L using the J 41240-5A and J 41240 .

Tighten
Tighten the fan clutch nut to 57 N·m (42 lb ft).

5. Install the upper radiator shroud. Refer to Fan Shroud Replacement .
6. Install the coolant recovery reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Radiator Surge Tank Replacement .
7. Install the air cleaner and the duct.

•	Air Cleaner Assembly Replacement in Engine Controls - 4.3L

•	Air Cleaner Assembly Replacement in Engine Controls - 5.0L and 5.7L

•	Air Cleaner Assembly Replacement in Engine Controls - 6.5 (L65)

•	Air Cleaner Assembly Replacement in Engine Controls - 8.1L