Harmonic Balancer - Crankshaft Pulley: Service and Repair

Crankshaft Balance Replacement
Tools Required
^ J 36660-A Torque Angle Meter
^ J 41478 Crankshaft Front Oil Seal Replacement
^ J 41816-2 Crankshaft End Protector
^ J 44226 Crankshaft Balancer Remover/Holder

Removal Procedure





1. Remove the radiator intake baffle.
2. Remove the grill.

Important: When removing the diagonal brace, only remove the one bolt from the battery tray brace that is bolted to the radiator brace.

3. Remove the radiator support diagonal brace.
4. Remove the hood latch support.
5. Remove the cooling fan and shroud.
6. Remove the drive belt.
7. Carefully loosen and remove the balancer bolt.





8. Install J 41816-2 into the end of the crankshaft.

Important: Do not pull on outer edge of the crankshaft.

9. Using the J 44226 remove the balancer.
10. Remove J 44226 and J 41816-2.
11. Remove the crankshaft balancer shim from the crankshaft snout.
12. Clean and inspect the crankshaft balancer.

Installation Procedure

Important: The crankshaft balancer does not have a key-way; so the crankshaft could turn when tightening, causing an improper torque. Make sure to follow the installation procedure to prevent damage.





1. Raise the vehicle.
2. Remove the torque converter access plug in the dry part of the oil pan.
3. Use the torque converter holding tool from the J 44226 kit and secure the torque converter while tightening the crankshaft balancer.
4. Install a new crankshaft balancer shim GM P/N 12573950 over the crankshaft snout, against the crankshaft gear.
5. Using the J 41478 install and seat the crankshaft balancer.
6. Remove the J 41478.

Notice: Refer to Fastener Notice in Service Precautions.





7. While still holding the flywheel, install the balancer washer and the bolt.
^ Tighten the crankshaft balancer bolt to 150 Nm (110 ft. lbs.). Use the J 36660-A in order to tighten the balancer bolt an additional 180 degrees.
8. Remove the torque converter holding tool.
9 Install the torque converter access plug into the oil pan.
10. Lower the vehicle.
11. Install the drive belt.
12. Install the cooling fan and shroud.
13. Install the hood latch support.
14. Install the radiator diagonal brace.
15. Install the grill.
16. Install the radiator air intake baffle.