GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.9L 🢒 Crankshaft Balancer Replacement

Special Tools

    • EN 46359 Puller End Protector
    • J 29113 Balancer and Crank Sprocket Installer
    • J 37096 Flywheel Holder
    • J 41816 Harmonic Balancer Remover
    •  J 45059 Angle Meter

Removal Procedure

    Caution: 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.

  1. Remove the drive belt. Refer to Drive Belt Replacement.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the right front tire and wheel. Refer to Tire and Wheel Removal and Installation.
  4. Remove the right engine splash shield. Refer to Engine Splash Shield Replacement.
  5. Install adjustable jack stands under the frame.
  6. Loosen the left side frame bolts and remove the right side frame bolts.
  7. Using the jack stands, lower the right side of the frame in order to access the crankshaft balancer.
  8. Remove the torque converter covers.
  9. Install the J 37096 to the flywheel in order to prevent flywheel rotation.

    10. Object Number: 1556792 Size: SH
  10. Remove the crankshaft balancer bolt and the washer.

    11. Object Number: 1556793 Size: SH

    Caution: Do NOT use a power-assisted tool with the special tool in order to remove or install this component. You cannot properly control the alignment of this component using a power-assisted tool, and this can damage the component.

  11. Remove the crankshaft balancer using the J 41816 and EN 46359 .

Installation Procedure

    Object Number: 1557862 Size: SH
  1. Apply sealer to the keyway of the crankshaft balancer. Refer to Adhesives, Fluids, Lubricants, and Sealers.
  2. Place the crankshaft balancer into position over the key in the crankshaft.

    3. Caution: Do NOT use a power-assisted tool with the special tool in order to remove or install this component. You cannot properly control the alignment of this component using a power-assisted tool, and this can damage the component.

  3. Thread the J 29113 into the crankshaft.
  4. Rotate the hex nut on the J 29113 in order to install the crankshaft balancer onto the crankshaft.
  5. Remove the J 29113 from the crankshaft.

    6. Object Number: 1556792 Size: SH
  6. Install the crankshaft balancer washer and the bolt.

    7. Caution: Refer to Fastener Caution in the Preface section.

  7. Install the used crankshaft balancer bolt.

    8. Tighten
    Tighten the used crankshaft balancer bolt to 125 N·m (92 lb ft).

  8. Remove the used crankshaft balancer bolt.
  9. Install the NEW crankshaft balancer bolt.

    10. Tighten

    1. Tighten the crankshaft balancer bolt a first pass to 125 N·m (92 lb ft).
    2. Tighten the crankshaft balancer bolt a final pass to 130 degrees using the J 45059 .
  10. Remove the J 45059 from the flywheel.
  11. Install the torque converter covers.
  12. Raise the frame into the original position.
  13. Install and tighten the right and left side frame bolts.

    14. Tighten
    Tighten the bolts to 100 N·m (74 lb ft) plus an additional 90 degrees using the J 45059 .

  14. Install the right engine splash shield. Refer to Engine Splash Shield Replacement.
  15. Install the right front tire and wheel. Refer to Tire and Wheel Removal and Installation.
  16. Lower the vehicle.
  17. Install the drive belt. Refer to Drive Belt Replacement.