GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
  2. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  3. Remove the valve rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement
  4. Remove the lower intake manifold. Refer to Intake Manifold Replacement
  5. Remove the valve lifters. Refer to Valve Lifter Removal
  6. Remove the engine cooling fan and the fan shroud. Refer to Fan Clutch Replacement
  7. Remove the radiator grille. Refer to Grille Replacement in Body.
  8. Remove the hood latch bracket. Refer to Hood Latch Bracket Replacement in Body.
  9. Remove the radiator. Refer to Radiator Replacement
  10. Remove the A/C condenser, if equipped. Refer to Condenser in HVAC.
  11. Remove the water pump. Refer to Water Pump Replacement
  12. Remove the three crankshaft pulley bolts and the crankshaft pulley. Refer to Crankshaft Balancer Replacement
  13. Raise the vehicle.
  14. Remove the oil pan. Refer to Oil Pan Replacement .
  15. Lower the vehicle.
  16. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  17. Remove the crankshaft reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement .

  18. Object Number: 11503  Size: SH
  19. Rotate the number one piston to Top Dead Center (TDC).
  20. Align the timing marks on the camshaft and the crankshaft sprockets.

  21. Object Number: 65453  Size: SH
  22. Remove the camshaft sprocket bolts.
  23. Remove the camshaft sprocket and the timing chain.
  24. Remove the camshaft retainer plate and bolts using a T-30 Torx® socket.

  25. Object Number: 69013  Size: SH

    Important: All camshaft journals are the same diameter, so care must be used in removing the camshaft to avoid damage to the bearings.

  26. Remove the camshaft.

  27. Object Number: 35212  Size: SH
  28. Clean all sealing surfaces.
  29. Inspect all parts for wear. Refer to Camshaft and Bearings Clean and Inspect

Installation Procedure


    Object Number: 69013  Size: SH
  1. Install the camshaft. Refer to Camshaft Installation
  2. Install the timing chain and sprockets. Refer to Timing Chain and Sprocket Replacement
  3. Install the crankshaft reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement
  4. Install the engine front cover. Refer to Engine Front Cover Replacement
  5. Raise the vehicle.
  6. Install the fasteners to the oil pan. Refer to Oil Pan Installation
  7. Lower the vehicle.

  8. Object Number: 4065  Size: SH
  9. Use the J 23523-F in order to install the crankshaft balancer. Refer to Crankshaft Balancer Replacement
  10. 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.

  11. Install the crankshaft pulley in the following manner:
  12. • Install the pulley and the three bolts.
    • Install the crankshaft balancer bolt.

    Tighten

        • Tighten the pulley bolts to 58 N·m (43 lb ft).
        • Tighten the crankshaft balancer bolt to 100 N·m (74 lb ft).
  13. Install the water pump. Refer to Water Pump Replacement

  14. Object Number: 199015  Size: SH
  15. Install the A/C condenser, if equipped. Refer to Condenser in HVAC.
  16. Install the radiator.
  17. Refer to Radiator Replacement

  18. Install the hood latch bracket. Refer to Hood Latch Bracket Replacement in Body.
  19. Install the radiator grille. Refer to Grille Replacement in Body.
  20. Install the engine cooling fan and the upper fan shroud. Refer to Fan Clutch Replacement
  21. Install the valve lifters. Refer to Valve Lifter Installation
  22. Install the lower intake manifold. Refer to Intake Manifold Replacement
  23. Install the valve rocker arms and push rods. Refer to Valve Rocker Arm and Push Rod Replacement
  24. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
  25. Replace the engine oil filter. Refer to Engine Oil and Oil Filter Replacement