Removal & Installation
3.1L & 3.4L Engines
The inertial weight section of the crankshaft balancer (also called a Crankshaft Damper, or Torsional Damper) is assembled to the hub with a rubber type material. The correct installation procedures, with the proper tools, must be followed or movement of the inertial weight section of the hub will destroy the tuning of the crankshaft balancer.
- Remove the drive belt. Please see Section 1.
- Raise and safely support the vehicle.
- Remove the right front tire assembly. Locate and remove the right splash shield.
- On the 3.4L (VIN X) engine, remove the three bolts holding the crankshaft pulley and remove the pulley.
- Remove the crankshaft balancer bolt and washer.
- Remove the crankshaft balancer using a three-leg puller such as J 24420-B, or equivalent.
- Clean all parts well. Apply a thin coat of sealer GM #12345739, or equivalent, to the keyway of the balancer. This is to help prevent oil from wicking along the keyway and causing a leak.
- Install the crankshaft balancer using tool J 29113 Crankshaft Balancer Installer or equivalent, to draw the balancer onto the crankshaft. Do not hammer on the balancer.
- Install the crankshaft bolt and washer and torque to 76-80 ft. lbs. (103-108 Nm).
- Install the remainder of the components in the reverse order of removal.
- Disconnect the negative battery cable.
- On the 3.8L (VIN 1) engine, remove the supercharger belt.
- Remove the accessory drive belt. Please see Section 1.
- Raise and safely support the vehicle. Remove the right front tire assembly and inner fender splash shield.
- Remove the flywheel cover.
- GM recommends a device be used to lock the flywheel to keep the crankshaft from turning when the balancer center bolt is being removed. Their tool, J 37096 is a toothed device that, after removing the torque converter cover, is positioned so its teeth engage the teeth of the flywheel. This particular tool requires an assistant to hold the tool with a breaker bar. Use care if using substitutes.
- Remove the crankshaft balancer retaining bolt.
Service the balancer as a unit. Do not separate the pulley from the balancer hub.
- Install an appropriate puller and draw the balancer from the crankshaft. Use care not to damage the end of the crankshaft.
- Coat the front cover seal contact area on the crankshaft balancer and the seal surface with engine oil.
- Install the balancer and push on as far as it will go.
This bolt is designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. Components may be damaged.
- Install the crankshaft balancer retainer bolt and, with the flywheel restrained from turning, tighten the bolt with a torque angle meter to 111 ft. lbs. (150 Nm) plus an additional 76 degrees.