GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Corvette 🢒 Engine 🢒 Engine Mechanical - 4.3L and 5.7L 🢒 Camshaft Replacement

Removal Procedure
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Remove the intake manifold. Refer to Intake Manifold Replacement .

    3. Object Number: 11507 Size: SH
  3. Remove the oil pump driveshaft bolt.
  4. Remove the oil pump driveshaft.
  5. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .
  6. Remove the camshaft sprocket and the timing chain. Refer to Timing Chain, Sprockets, and WP Driveshaft Replace .
  7. Remove the valve lifters. Refer to Valve Lifter Replacement .

    8. Object Number: 11510 Size: SH
  8. Remove the air cleaner.
  9. Disconnect the high fill reservoir hose from the radiator.
  10. Remove the relay bracket from the left side of the radiator support.
  11. Remove the secondary air injection pump intake duct and bolts. Move the pump aside. Refer to Secondary Air Injector Pump Replacement in Engine Controls.
  12. Remove the nuts, the screws, and the upper radiator support. Refer to Radiator Support Replacement in Engine Cooling.
  13. Remove the radiator. Refer to Radiator Replacement in Engine Cooling.
  14. Raise and support the vehicle. Refer to SECTION 0A.
  15. Disconnect the cooling fan electrical connectors.
  16. Remove the lower fan shroud bolts. Refer to Fan Shroud Replacement in Engine Cooling.
  17. Lower the vehicle.
  18. Remove the fan shrouds with fans.
  19. Disconnect the A/C condenser line bracket at the front crossmember.
  20. Raise the front of the engine.
  21. Remove the camshaft retainer bolts.
  22. Remove the retainer.

    23. Important: All of the camshaft journals are the same diameter. Use care when you remove the camshaft in order to avoid damage to the bearings.


    Object Number: 11511 Size: SH
  23. Use the following procedure in order to remove the camshaft:
    24. 23.1. Install the three 5/16--18 x 4.0 inch bolts in the camshaft front bolt holes.
    23.2. Carefully rotate and pull the camshaft out of the bearings.
  24. Inspect and measure the camshaft. Refer to Camshaft Removal .
  25. Measure the camshaft lobe lift. Refer to Valve Rocker Arm, Push Rod, and Stud Installation .
  26. Inspect the camshaft bearings for the following conditions:
    27. • Scratches
    • Pits
    • Loose bearing fit in their bores
    • Replace the camshaft bearings, if necessary. Refer to Camshaft Bearing Removal and Installation .

Installation Procedure
  1. Coat the camshaft lobes with Molykote or its equivalent when you install a new camshaft.
  2. Replace all of the valve lifters when you install a new camshaft in order to ensure the durability of camshaft lobes and lifter rollers.
  3. Lubricate all of the camshaft journals with engine oil.

    4. Object Number: 11511 Size: SH
  4. Install the camshaft.
  5. Install the camshaft retainer and the camshaft retainer bolts.

    6. Tighten
    Tighten the camshaft retainer bolts to 12 N·m (106 lb ft).

    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. Lower the front of the engine.
  7. Connect the A/C condenser line bracket to the front crossmember.
  8. Install the fans and the fan shroud.
  9. Raise and support the vehicle. Refer to SECTION 0A.
  10. Install the lower fan shroud bolts. Refer to Fan Shroud Replacement in Engine Cooling.
  11. Connect the cooling fan electrical connectors.
  12. Lower the vehicle.
  13. Install the radiator. Refer to Radiator Replacement in Engine Cooling.
  14. Install the upper radiator support, the nuts, and the screws. Refer to Radiator Support Replacement in Engine Cooling.
  15. Install the secondary air injection pump intake duct and bolts. Move the pump aside. Refer to Secondary Air Injector Pump Replacement in Engine Controls.
  16. Install the relay bracket to the left side of the radiator support.
  17. Connect the high fill reservoir hose to the radiator.

    18. Object Number: 11510 Size: SH
  18. Install the air cleaner.
  19. Install the valve lifters. Refer to Valve Lifter Replacement .
  20. Install the camshaft sprocket and the timing chain. Refer to Timing Chain, Sprockets, and WP Driveshaft Replace .
  21. Install the valve rocker arms and valve pushrods. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .

    22. Object Number: 11507 Size: SH
  22. Install the oil pump driveshaft.
  23. Install the oil pump driveshaft bolt.

    24. Tighten
    Tighten the oil pump driveshaft bolt to 18 N·m (13 lb ft).

    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.

  24. Install the intake manifold. Refer to Intake Manifold Replacement .
  25. Install the engine front cover. Refer to Engine Front Cover Replacement .