Tools Required

J 23523-F Crankshaft Balancer Remover and Installer

1. Remove the drive belt. Refer to Drive Belt Replacement .
2. Remove the cooling fan. Refer to Fan 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.

3. Remove the crankshaft balancer bolt and washer.



4. Remove the crankshaft pulley bolts and pulley.



5. Using J 23523-F , remove the crankshaft balancer.

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.

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

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

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

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

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



7. Note the position and length of any crankshaft balancer weights, if necessary.
8. Clean and inspect the crankshaft balancer, if necessary. Refer to Crankshaft Balancer Cleaning and Inspection in Engine Mechanical - 4.3L Unit Repair.

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

Important: The length and location of the weight(s) must be the same as the original.

2. Ensure that the crankshaft balancer weight(s) is installed in the proper location, if necessary.




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.

3. Apply a small amount of adhesive GM U.S. P/N 12346141, Canada P/N 10953433, or equivalent into the crankshaft balancer keyway in order to seal the crankshaft balancer keyway and crankshaft joint.
4. Align the keyway of the crankshaft balancer with the crankshaft balancer key.
5. Install the crankshaft balancer onto the end of the crankshaft.



6. Using J 23523-F , press the crankshaft balancer onto the crankshaft.

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.

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

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

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

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

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

7. Remove the J 23523-F .



8. Install the crankshaft pulley and bolts.

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




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



10. Install the crankshaft balancer washer and bolt.

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

11. Install the cooling fan. Refer to Fan Replacement in Engine Cooling.
12. Install the drive belt. Refer to Drive Belt Replacement .