GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the engine oil pan. Refer to Oil Pan Replacement .

  3. Object Number: 33654  Size: SH
  4. Remove the balance shaft chain cover.
  5. Remove the balance shaft chain tensioner bolt.
  6. Remove the balance shaft chain tensioner.

Installation Procedure


    Object Number: 33654  Size: SH
  1. Time the balance shaft chain. Refer to Balance Shaft to Engine Timing
  2. Install the balance shaft chain tensioner.

  3. Object Number: 61198  Size: SH

    Important: You must use a brass feeler gauge in order to obtain correct measurements. A steel gauge will not conform to the guide and will not provide correct measurements.

  4. Adjust the balance shaft drive chain tension by inserting a 1 mm (0.040 in) brass feeler gauge between the chain guide and the chain. Press the guide against the chain using about 3 pounds of force.
  5. Notice: 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. Tighten the chain tensioner fastener.
  7. Tighten
    Tighten the bolts to 13 N·m (115 lb in).


    Object Number: 33654  Size: SH
  8. Install the balance shaft chain cover.
  9. Install the balance shaft chain cover nut and bolt.
  10. Tighten
    Tighten the nut and bolt to 13 N·m (115 lb in).

  11. Install the oil pan. Refer to Oil Pan Replacement .
  12. Connect the negative battery cable.