GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Engine 🢒 Engine Controls - 3.0L 🢒 Timing Belt Cover 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 intake air resonator. Refer to Intake Air Resonator Replacement in Engine Controls.
  3. Remove the intake plenum. Refer to Intake Plenum Replacement .
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the splash shield bolts.
  6. Remove the splash shield.

    7. Object Number: 158549 Size: SH
  7. Counterhold the generator bolt on the back side of the generator to remove the AIR injection crossover pipe bracket nut (6) from the generator bolt.
  8. Remove the AIR injection crossover pipe bushing nut (1), located on the left side of the engine, from the bracket.
  9. Remove the AIR injection crossover pipe clamps from the rubber hose connections.
  10. Remove the AIR injection crossover pipe from the rubber hose connections (2).
  11. Lower the vehicle.
  12. Remove the AIR injection check valve (8) hose clamp.
  13. Remove the AIR injection check valve hose connection.
  14. Remove the AIR injection crossover pipe (4).

    15. Important: Do not remove the water pump pulley bolts at this time. The accessory drive belt tension provides the resistance to enable the loosening of the bolts.

  15. Loosen the water pump pulley bolts.

    16. Important: Do not remove the power steering pump bolts at this time. The accessory drive belt tension provides the resistance to enable the loosening of the bolts.

  16. Loosen the power steering pump pulley bolts.

    17. Object Number: 143405 Size: SH
  17. Remove the A/C compressor hose support strap bolt (1) from the AIR injection crossover bracket.
  18. Remove the accessory drive belt.
  19. Release the plastic retaining tabs on the wiring harness channel extension from the right lower side of the wiring harness channel and pull forward to remove.

    20. Important: Use caution when releasing the retaining tabs to reduce the risk of breakage when removing the wiring harness channel cover.

  20. Remove the wiring harness channel cover.
  21. Note the wiring harness routing.
  22. Remove the wiring harness from the channel.
  23. Remove the water pump pulley bolts.
  24. Remove the water pump pulley.
  25. Remove the power steering pump pulley bolts.
  26. Remove the power steering pump pulley.

    27. Object Number: 158553 Size: SH
  27. Remove the accessory drive belt tensioner bolts.
  28. Remove the accessory drive belt tensioner.

    29. Object Number: 158566 Size: SH
  29. Remove the front timing belt cover bolts.
  30. Remove the front timing belt cover.
  31. Transfer wiring harness channel if applicable.
  32. Inspect the sealing strip on the outer edge of the front timing belt cover for cracks and/or tears. Replace as necessary.

Installation Procedure

    Object Number: 158566 Size: SH
  1. Install the front timing belt cover.

    2. 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 front timing belt cover bolts.

    3. Tighten
    Tighten the front timing belt cover bolts to 8 N·m (71 lb in).


    Object Number: 158553 Size: SH
  3. Install the accessory drive belt tensioner.
  4. Install the accessory drive belt tensioner bolts.

    5. Tighten
    Tighten the accessory drive belt tensioner bolts to 40 N·m (30 lb ft).

  5. Install the power steering pump pulley.
  6. Install the power steering pump pulley bolts.
  7. Snug the power steering pump pulley bolts. The bolts will be tightened to proper specification when the accessory drive belt is installed.
  8. Install the water pump pulley.
  9. Install the water pump pulley bolts. Snug the water pump pulley bolts. The bolts will be tightened to proper specification when the accessory drive belt is installed.
  10. Install the water pump pulley screws.
  11. Route the wiring harness into the wiring harness channel.
  12. Install the wiring harness channel cover.
  13. Install the wiring harness channel extension to the right lower side of the wiring harness channel.
  14. Install the accessory drive belt.

    15. Object Number: 143405 Size: SH
  15. Install the A/C compressor hose support strap bolt (1) to the AIR injection crossover bracket.

    16. Tighten

        • Tighten the A/C compressor hose support strap bolt to 8 N·m (71 lb in).
        • Tighten the water pump pulley bolts to 8 N·m (71 lb in).
        • Tighten the power steering pump pulley bolts to 20 N·m (15 lb ft).

    Object Number: 158549 Size: SH
  16. Install the AIR injection check valve (8) hose connections.
  17. Install the AIR injection check valve hose clamps.
  18. Install the AIR injection crossover pipe bushing nut (1), located on the left side of the engine, from the bracket.

    19. Tighten
    Tighten the AIR injection crossover pipe bushing nut to 12 N·m (108 lb in).

  19. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  20. Install the AIR injection crossover pipe (4) to the rubber hose connections (2).
  21. Install the AIR injection crossover pipe clamps to the rubber hose connections.
  22. Install the AIR injection crossover pipe bracket (6) nut to the generator bolt.
  23. Counterhold the generator bolt with a wrench on the back side of the generator to install the AIR injection crossover pipe support bracket nut to the generator bolt.

    24. Tighten
    Tighten the generator bolt to 40 N·m (30 lb ft).

  24. Install the splash shield.
  25. Install the splash shield bolts.

    26. Tighten
    Tighten the splash shield bolts until fully seated. Do not strip the splash shield bolts.

  26. Lower the vehicle.
  27. Install the intake plenum. Refer to Intake Plenum Replacement .
  28. Install the intake air resonator. Refer to Intake Air Resonator Replacement in Engine Controls.
  29. Connect the negative battery cable.
  30. Reprogram the applicable accessories. Refer to Reprogramming Accessories After Battery Disconnect in Engine Electrical.