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Harmonic Balancer - Crankshaft Pulley: Service and Repair



This article has been updated with bulletin No.: 57-61-34A.

NEW HARMONIC BALANCER INSTALLATION

1996 model year engines are equipped with a smaller diameter M14 crankshaft balancer bolt, which replaces the larger M18 bolt. Since this new bolt is smaller in diameter, Kent Moore tool number J 39344 is no longer used on 1996 model engines. A new harmonic balancer tool J 41998 is now available and must be used whenever installation of the harmonic balancer is necessary. This new bolt has a revised torque specification of 50 N.m (37 lb. ft.) plus 120° for installation.

IMPORTANT: A small number of 1995 engines were built with crankshafts equipped with the M14 bolt. Identify the size of the bolt to determine the proper torque specification.

HARMONIC BALANCER












Tools Required:
^ J 28467-A Engine Support Fixture
^ J 28467-330 Engine Support Adapter
^ J 28467-350 Engine Support Adapter
^ J 28467-94 Engine Support Adapter
^ J 38416-B Harmonic Balancer Remover
^ J 39344 Harmonic Balancer Installer
^ J 39411 Flywheel Holder

Remove or Disconnect

1. Install Engine Support Fixture.
2. Release tension from accessory drive belt.
3. Torque axis engine mount/bracket assembly.
4. Lower engine using support fixture to obtain clearance for special tool no. J 38416-B below the body rail.
5. Raise vehicle.
6. Brace between engine oil pan and transmission case and install flywheel holder J 39411.
7. Balancer retainer bolt.
8. Install pilot J 39344 into end of crankshaft.
9. Harmonic balancer using puller J 38416-B.

Install or Connect

1. Position balancer to crankshaft.
2. Balancer using J 39344.
3. Thoroughly clean balancer bolt threads. Apply clean engine oil to threads and install bolt.

Tighten
M14 bolt to 50 N.m (37 lb. ft.)
M18 bolt to 60 N.m (44 lb. ft.)

4. Balancer bolt must be tightened an additional 120°. Mark the balancer bolt head in line with the centerline of one of the balancer legs.
5. Make another mark along the centerline of the next balancer leg clockwise from the previous mark (120°).
6. Tighten balancer bolt until mark on bolt head is in-line the next balancer leg clockwise from starting point. A torque multiplier may be required.
7. Remove flywheel holder and install oil pan to transaxle brace.

Tighten
Four bolts to 50 N.m (37 lb. ft.)

8. Tighten frame to body bolts.

Tighten
Bolts to 192 N.m (142 lb. ft.)

9. Lower vehicle.
10. Raise engine at support fixture.
11. Torque axis engine mount/bracket assembly.
12. Accessory drive belt.

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