Malibu 2001-2005

Balance Shaft

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Removal & Installation



2.2L Engine
  1. Remove the engine drive belt.

    Click image to see an enlarged view

    Fig. Use special tool J38122-A to prevent the crankshaft from rotating while loosening the crankshaft balancer bolt

  2.  
  3. Use special tool J38122-A to prevent the crankshaft from rotating while loosening the crankshaft balancer bolt.
  4.  
  5. Remove the crankshaft balancer bolt. Discard the bolt.

    Click image to see an enlarged view

    Fig. Remove the crankshaft balancer

  6.  
  7. Remove the crankshaft balancer.
  8.  

To install:

  1. Install the crankshaft balancer.
  2.  
  3. Install a NEW crankshaft balancer bolt.
  4.  
  5. Use special tool J38122-A to prevent the crankshaft from rotating while tightening the crankshaft balancer bolt. Tighten the bolt to 74 ft. lbs. (100 Nm) plus 75 degrees.
  6.  
  7. Install the engine drive belt.
  8.  

  1. Remove engine assembly.
  2.  
  3. Remove engine front cover and timing components.
  4.  
  5. Remove the balance shaft bearing carrier bolts.
  6.  
  7. Remove the balance shaft assemblies.
    WARNING
    It is possible to install the intake side balance shaft into the exhaust side and vice versa. Please use care not to install the balance shafts into the wrong bores. Engine vibration will result. Do not remove the bolt holding the sprocket.



    Click image to see an enlarged view

    Fig. Removal of balance shafts-2.2L engine

  8.  
  9. Install the J 43650 into the balance shaft hole. Insert the tool with the foot parallel to the shaft.

    Click image to see an enlarged view

    Fig. J 43650- Balance shaft bushing removal tool

  10.  
  11. When the J 43650 is inserted in the block turn the J 43650 so that the foot becomes perpendicular to the shaft.
  12.  
  13. Center the foot of the J 43650 on the balance shaft bushing.
  14.  
  15. Once the J 43650 is centered on the balance shaft bushing, then insert the centering guide into the front balance shaft bore and tighten the nut with an appropriate wrench
  16.  
  17. When the J 43650 is properly installed, before removing the bushing, the end of the tool should be 4.6 inch. (116 mm) from the block face.
  18.  
  19. If the J 43650 is less than approximately 4.5 inch. (114 mm) recheck the tool alignment.
  20.  
  21. Tighten the nut on the J 43650 until the tension releases. When the tension releases, remove the J 43650 and the balance shaft bushing.
  22.  

To install:

  1. Install the balance shaft bushing using the J 43650.

    Click image to see an enlarged view

    Fig. Balance shaft bushing installation-2.2L engine

  2.  
  3. Seat the balance shaft bushing into the bore using the J 43650 and a wrench.
  4.  
  5. When the J 43650 is fully seated in the engine block, remove it with a wrench.
    WARNING
    If the balance shafts are not properly timed to the engine, the engine may vibrate or make noise.

  6.  
  7. Install the balance shaft assemblies to the engine using the following steps:
    1. Place the number one piston at top dead center (TDC).
    2.  
    3. Lubricate the balance shaft lobes with engine oil.
    4.  
    5. Install the balance shafts into their bores.
      NOTE
       Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    6.  

  8.  
  9. Install the balance shaft retaining bolts.
  10.  
  11. Tighten the balance shaft retaining bolts to 89 inch. lbs. (10 Nm).
  12.  

3.1L Engine

NOTE
The inertial weight section of the balancer is assembled to the hub with a rubber type material. The correct removal procedure must be followed or movement of the inertial weight section of the hub will destroy the tuning of the balancer.

  1. Remove the drive belt.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the right front tire and wheel.
  6.  
  7. Remove the right engine splash shield.
  8.  
  9. Remove the flywheel inspection cover.
  10.  
  11. Remove the balancer retaining bolt. Have an assistant keep the flywheel from turning.
  12.  
  13. Install the special tool J24420-C on the balancer.
  14.  
  15. Turn the puller screw.
  16.  
  17. Remove the balancer.

    Click image to see an enlarged view

    Fig. The removal and installation of the crankshaft balance shaft

  18.  

To install:

  1. Coat the front cover seal contact area with engine oil.
  2.  
  3. Apply sealant to the crankshaft key. Apply sealant to the crankshaft keyway. Use GM RTV sealant P/N 1052917 or the equivalent.
  4.  
  5. Place the balancer into position over the key in the crankshaft.
  6.  
  7. Install the special tool J29113 onto the crankshaft.
  8.  
  9. Pull the balancer into position.
  10.  
  11. Remove the special tool J29113 from the balancer.
    NOTE
    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  12.  
  13. Install the balancer retaining bolt. Have an assistant keep the flywheel from turning. Tighten the crankshaft balancer bolt to 76 ft. lbs. (103 Nm).
  14.  
  15. Install the flywheel inspection cover.
  16.  
  17. Install the right engine splash shield.
  18.  
  19. Install the right tire and wheel.
  20.  
  21. Lower the vehicle.
  22.  
  23. Install the drive belt.
  24.  
  25. Perform the crankshaft position learn variation procedure.
  26.  

3.5L Engine

NOTE
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.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the right front tire and wheel.
  6.  
  7. Remove the right engine splash shield.
  8.  
  9. Install the jack stands to the frame.
  10.  
  11. Loosen the left frame bolts and remove the right side frame bolts.
  12.  
  13. Using the jack stands, lower the right side of the frame to access the crankshaft balancer.
  14.  
  15. Remove the torque converter covers.
  16.  
  17. Install the special tool J37096 to the flywheel to prevent flywheel rotation.

    Click image to see an enlarged view

    Fig. Remove the crankshaft balancer bolt and the washer

  18.  
  19. Remove the crankshaft balancer bolt and the washer.

    Click image to see an enlarged view

    Fig. Using the special tool J41816, remove the crankshaft balancer

  20.  
  21. Remove the crankshaft balancer. Use the special tool J41816.
  22.  

To install:

  1. Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or the equivalent to the keyway of the balancer.

    Click image to see an enlarged view

    Fig. Using the special tool J29113, install the crankshaft balancer

  2.  
  3. Install the crankshaft balancer. Use the special tool J29113.
  4.  
  5. Remove the special tool J29113.
  6.  
  7. Install the special tool J37096 to the flywheel to prevent flywheel rotation.
  8.  
  9. Install the crankshaft balancer washer and the bolt, and tighten the bolt to 118 ft. lbs. (160 Nm).
  10.  
  11. Remove the special tool J37096 from the flywheel.
  12.  
  13. Install the torque converter covers.
  14.  
  15. Raise the frame to the original position.
  16.  
  17. Install and tighten the frame bolts.
  18.  
  19. Install the right engine splash shield.
  20.  
  21. Install the right front tire and wheel.
  22.  
  23. Lower the vehicle.
  24.  
  25. Install the drive belt.
  26.  

 
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