GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Skylark 🢒 Engine 🢒 Engine Mechanical - 2.4L 🢒 Oil Pump Replacement

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
  3. Remove the balance shaft chain cover.

    4. Object Number: 33657 Size: SH
  4. Remove the balance shaft chain tensioner assembly.
  5. Remove the oil pump cover.
  6. Remove the oil pump.

Installation Procedure
  1. Install the oil pump

    2. Object Number: 61198 Size: SH

    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.

  2. Install the oil pump cover to balance shaft housing.

    3. Tighten
    Tighten the long bolts to 12 N·m (106 lb in).Tighten the short bolts to 10 N·m (89 lb in).


    Object Number: 61198 Size: SH
  3. Install the balance shaft chain tensioner.

    4. Important: A brass feeler gauge needs to be used to ensure correct measurements are obtained. If a steel gauge is used, it will not bend to conform to the guide and will not allow for correct measurements.

  4. Adjust the balance shaft drive chain tension by inserting a 1 mm (0.40 in). Brass feeler gauge between the chain guide and the chain.
  5. Press the guide against the chain using about 3 pounds of force.
  6. Tighten the chain tensioner.

    7. Tighten
    Tighten the bolt to 13 N·m (115 lb in).

  7. Install the oil pan gasket and the oil pan. Refer to Oil Pan Replacement .
  8. Connect the negative battery cable.