GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Corvette 🢒 Engine 🢒 Engine Mechanical - 4.3L and 5.7L 🢒 Valve Stem Oil Seal and Valve Spring Replacement

Removal Procedure

Tools Required

    • J 22794 Spark Plug Port Adapter
    • J 5892-D Valve Spring Compressor
  1. Remove the rocker arms and pushrod at cylinder in order to service. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .
  2. Remove the spark plug at the cylinder to be serviced.

    3. Caution: The piston should be placed at BDC before you apply compressed air to the cylinder head. This may cause the engine to rotate and result in personal injury.


    Object Number: 11517 Size: SH
  3. Install the J 22794 to the spark plug hole.

    4. Apply compressed air in order to hold the valves in place.

  4. Compress the valve spring using the J 5892-D .

    5. Object Number: 28779 Size: SH
  5. Remove the valve stem keys (2).
  6. Remove the valve spring cap (3).
  7. Remove the valve spring (4).
  8. Remove the valve stem oil seal (5).
  9. Leave the shim (6) in place. If the shim is removed, return it to its original location.

Installation Procedure

Tools Required

    • J 22794 Spark Plug Port Adapter
    • J 5892-D Valve Spring Compressor

    Object Number: 28779 Size: SH
  1. Install the valve stem oil seal (5) and seat the seal against the valve spring guide.
  2. Install the valve spring (4).
  3. Install the valve spring cap (3).
  4. Use the J 5892-D in order to compress the valve spring.
  5. Install the valve stem keys (2). Use grease in order to hold the keys in place while disconnecting the J 5892-D .
  6. Remove the J 22794 . Ensure that the keys seat properly in the upper groove of the valve stem.
  7. Tap the end of the stem (1) with a plastic-faced hammer in order to seat the keys, if necessary.
  8. Install the spark plug.

    9. Tighten
    Tighten the spark plug to 20 N·m (15 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.

  9. Install the valve rocker arms and valve pushrods. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .