Harmonic Balancer - Crankshaft Pulley: Service and Repair
Crankshaft Balancer Replacement^ Tools Required
- J 23523-F Balancer Remover and Installer
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the fan shroud assembly.
3. Remove the drive belt.
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.
4. Remove the crankshaft balancer bolt and washer.
5. Remove the bolts and the crankshaft pulley.
Notice: Refer to Fastener Notice in Service Precautions.
6. Use the J 23523-F in order to remove the crankshaft balancer.
6.1. Install the J23523-F plate and bolts onto the crankshaft balancer.
Tighten the bolts to 25 Nm (18 ft. lbs.).
6.2. Install the J23523-F forcing screw into the plate.
6.3. Rotate the J23523-F forcing screw clockwise in order to remove the crankshaft balancer.
7. Remove the J23523-F from the crankshaft balancer.
8. Note the position and length of any front groove pins (crankshaft balancer) (if applicable).
9. Clean the crankshaft balancer in cleaning solvent.
10. Dry the crankshaft balancer with compressed air.
11. 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)
Installation Procedure
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 (Canadian P/N 10953433) 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 the J 23523-F plate and bolts onto the front of the crankshaft balancer.
Tighten the J 23523-F plate bolts to 25 Nm (18 ft. lbs.).
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: Refer to Fastener Notice in Service Precautions.
7. Install the crankshaft pulley and bolts.
Tighten the crankshaft pulley bolts to 58 Nm (43 ft. lbs.).
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 the crankshaft balancer bolt to 95 Nm (70 ft. lbs.).
10. Install the drive belt.
11. Install the fan shroud assembly.
12. Connect the negative battery cable.