Tools Required

J 23523-F Balancer Remover and Installer

1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
2. Remove the drive belt. Refer to Drive Belt Replacement .
3. Remove the engine cooling fan assembly. Refer to Fan Clutch Replacement in Engine Cooling.
4. Remove the fan shroud assemblies. Refer to Engine Coolant Fan Upper Shroud Replacement and Engine Coolant Fan Lower Shroud Replacement in Engine Cooling.




Notice: To prevent damage to the end of the crankshaft when using a crankshaft balancer removal tool install a bolt in the crankshaft. Use a shorter bolt with the same threads as the crankshaft balancer bolt. This bolt will allow a place for the tool to push against. The shorter bolt is to keep from going past the threads in the crankshaft and damaging the crankshaft threads.

5. Remove the crankshaft balancer bolt and washer.



6. Remove the bolts and the crankshaft pulley.




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.

7. Use the J 23523-F in order to remove the crankshaft balancer.

7.1.	Install the J 23523-F plate and bolts onto the crankshaft balancer.

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

7.2.	Install the J 23523-F forcing screw into the plate.

7.3.	Rotate the J 23523-F forcing screw clockwise in order to remove the crankshaft balancer.

8. Remove theJ 23523-F from the crankshaft balancer.



9. Note the position and length of any front groove pins (crankshaft balancer) (if applicable).




Caution: Wear safety glasses in order to avoid eye damage.

10. Clean the crankshaft balancer in cleaning solvent.
11. Dry the crankshaft balancer with compressed air.
12. Inspect the crankshaft balancer for the following:

•	Loose or improperly installed front groove pin (1) (crankshaft balancer)

•	A properly installed front groove pin should be installed until flush or below flush with the face of the crankshaft balancer.

Important: A crankshaft front oil sealing surface with excessive scoring, grooves, rust, or other damage must be replaced.

•	Worn, grooved, or damaged crankshaft front oil sealing surface (2)

•	Minor imperfections on the crankshaft balancer crankshaft front oil seal surface may be removed with a polishing compound or fine grade emery cloth.

•	Worn, chunking, or deteriorated rubber (3) between the hub and the outer ring

•	Worn or damaged keyway (4)

•	Worn or damaged bolt hole threads (5)

1. Apply a small amount of grease to the crankshaft front cover oil seal sealing surface if reusing the seal.

Look to ensure that the front groove pin (crankshaft balancer) is installed in the proper location (if applicable).

The length and location of the pins must be the same as the original length and location.





Notice: The inertial weight section of the crankshaft balancer is assembled to the hub with a rubber type material. The correct installation procedures (with the proper tool) must be followed or movement of the inertial weight section of the hub will destroy the tuning of the crankshaft balancer.

2. Apply a small amount of adhesive GM P/N 12346141 or equivalent onto the crankshaft balancer keyway in order to seal the crankshaft balancer keyway and crankshaft joint.
3. Align the keyway of the crankshaft balancer with the crankshaft balancer key.
4. Install the crankshaft balancer onto the end of the crankshaft.



5. Use the J 23523-F in order to press the crankshaft balancer onto the crankshaft.

5.1.	Install theJ 23523-F plate and bolts onto the front of the crankshaft balancer.

Tighten
Tighten the J 23523-F plate bolts to 25 N·m (18 lb ft).

5.2.	Install the J 23523-F screw into the end for the crankshaft.

5.3.	Install the J 23523-F bearing, the washer, and the nut onto the screw.

5.4.	Rotate the J 23523-F nut clockwise until the crankshaft balancer hub is completely seated against the crankshaft position sensor reluctor ring.

6. Remove the J 23523-F .




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.

7. Install the crankshaft pulley and bolts.

Tighten
Tighten the crankshaft pulley bolts to 58 N·m (43 lb ft).




8. Ensure that the crown of the crankshaft balancer washer (2) is faced away from the engine.



9. Install the crankshaft balancer washer and the bolt.

Tighten
Tighten the crankshaft balancer bolt to 95 N·m (70 lb ft).

10. Install the fan shroud assemblies. Refer to Engine Coolant Fan Upper Shroud Replacement and Engine Coolant Fan Lower Shroud Replacement in Engine Cooling.
11. Install the engine cooling fan. Refer to Fan Clutch Replacement in Engine Cooling.
12. Install the drive belt. Refer to Drive Belt Replacement .
13. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.