GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Impala 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Crankshaft Balancer Replacement

Tools Required

    • EN 47699 Flywheel Holding Tool
    • J 41665 Crankshaft Balancer and Sprocket Installer
    • J 41816 Crankshaft Balancer Remover
    • J 41816-2 Crankshaft End Protector
    • J 42640 Steering Column Anti-Rotation Pin
    • J 45059 Torque Angle Meter

Removal Procedure
  1. Install a J 42640 . Refer to Steering Column Replacement .
  2. Remove the accessory drive belt. Refer to Drive Belt Replacement - Accessory .
  3. Remove the air cleaner upper housing. Refer to Air Cleaner Assembly Replacement .
  4. Remove the engine mount strut. Refer to Engine Mount Strut Replacement .
  5. Remove the starter motor. Refer to Starter Motor Replacement .
  6. Remove the front fender splash shield. Refer to Engine Splash Shield Replacement - Right Side .
  7. Disconnect the transaxle cooler lines at the transaxle. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  8. Remove the stabilizer shaft link lower nuts. Refer to Stabilizer Shaft Link Replacement .
  9. Remove the intermediate steering shaft pinch bolt and separate the shaft from the steering gear. Refer to Intermediate Steering Shaft Replacement .
  10. Remove the front lower air deflector braces and the deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement .
  11. Remove the radiator to frame braces.
  12. Install the engine support fixture. Refer to Engine Support Fixture .
  13. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  14. Remove the frame to body bolts.
  15. Remove the transmission bellhousing bolt located at approximately the 10 o'clock position when looking from the rear of the engine.

    16. Object Number: 1616192 Size: SH
  16. Install the EN 47699 and bolt to the block and flywheel.

    17. Tighten
    Tighten the bolt to 60 N·m (44 lb ft).

  17. Remove the right front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  18. Lower the engine approximately 100 mm (4 in).

    19. Object Number: 1411870 Size: SH
  19. Remove the crankshaft balancer bolt (139).

    20. Do not discard the crankshaft balancer bolt. The balancer bolt will be used during the balancer installation procedure.


    Object Number: 1411872 Size: SH
  20. Install the J 41816  (1) and the J 41816-2  (2), to the crankshaft balancer.

    21. Object Number: 1411874 Size: SH
  21. Remove the crankshaft balancer (138).
  22. Remove the J 41816 and the J 41816-2 from the crankshaft balancer.

Installation Procedure

Important: 

   • The used crankshaft balancer bolt will be used only during the first pass of the balancer installation procedure. Install a NEW bolt and tighten as described in the second, third and forth passes of the balancer bolt tightening procedure.
   • The crankshaft balancer installation and bolt tightening involves a four stage tightening process. The first pass ensures that the balancer is installed completely onto the crankshaft. The second, third, and forth passes tighten the new bolt to the proper torque.
   • The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.


    Object Number: 1411874 Size: SH
  1. Position the crankshaft balancer (138) onto the end of the crankshaft.

    2. Object Number: 1411964 Size: SH
  2. Using the J 41665 , install the crankshaft balancer.
    3. 2.1. Assemble the threaded rod, nut, washer and installer. Insert the smaller end of the installer into the front of the balancer.
    2.2. Use a wrench and hold the hex end of the threaded rod.
    2.3. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.
    2.4. Remove the tool and reverse the installation tool. Position the larger end of the installer against the front of the balancer.
    2.5. Use a wrench and hold the hex end of the threaded rod.
    2.6. Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed onto the crankshaft.
    2.7. Remove the balancer installation tool.

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1411870 Size: SH
  3. Install the USED crankshaft balancer bolt (139).

    4. Tighten
    Tighten the USED bolt to 330 N·m (240 lb ft).

  4. Remove the USED crankshaft balancer bolt.

    5. Object Number: 63245 Size: SH

    Important: The nose of the crankshaft should be recessed 2.4-4.48 mm (0.094-0.176 in) into the balancer bore.

  5. Measure for a correctly installed balancer. If the balancer is not installed to the proper dimensions, install the J 41665 and repeat the installation procedure.

    6. Object Number: 1411870 Size: SH
  6. Install a NEW crankshaft balancer bolt (139).

    7. Tighten

        • Tighten the bolt a first pass to 50 N·m (37 lb ft).
        • Tighten the bolt a second pass to 140 degrees using J 45059 .

    Object Number: 1616192 Size: SH
  7. Remove the EN 47699 and bolt from the block and flywheel.
  8. Install the transmission bellhousing bolt located at approximately the 10 o'clock position when looking from the rear of the engine.

    9. Tighten
    Tighten the bolt to 75 N·m (55 lb ft).

  9. Raise and properly position the frame and install the frame to body bolts. Refer to Frame Replacement .
  10. Install the frame to radiator braces.
  11. Install the front lower air deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement .
  12. Connect the intermediate steering shaft to the steering gear. Refer to Intermediate Steering Shaft Replacement .
  13. Install the stabilizer shaft link lower nuts. Refer to Stabilizer Shaft Link Replacement .
  14. Connect the transaxle cooler lines to the transaxle. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  15. Remove the engine support fixture.
  16. Install the front fender splash shield. Refer to Engine Splash Shield Replacement - Right Side .
  17. Install the starter motor. Refer to Starter Motor Replacement .
  18. Install the air cleaner upper housing. Refer to Air Cleaner Assembly Replacement .
  19. Install the accessory drive belt. Refer to Drive Belt Replacement - Accessory .
  20. Install the engine mount strut. Refer to Engine Mount Strut Replacement .
  21. Install the right front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  22. Perform the crankshaft position (CKP) system variation learn procedure. Refer to Crankshaft Position System Variation Learn .