GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Mechanical - 5.0L and 5.7L 🢒 Valve Stem Oil Seal and Valve Spring Replacement

Removal Procedure

Tools Required

    • J 22794 Spark Plug Port Adapter
    • J 38606 Valve Spring Compressor
    • J 5892-D Valve Spring Compressor

    Object Number: 68713 Size: SH
  1. Remove the valve rocker arms.

    2. Refer to Valve Rocker Arm and Push Rod Replacement .


    Object Number: 172979 Size: SH
  2. Remove the spark plugs. Refer to Spark Plug Replacement in Engine Electrical.

    3. Object Number: 65039 Size: SH
  3. Install the J 22794 into the spark plug hole.

    4. Caution: Wear safety glasses in order to avoid eye damage.

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

    5. Object Number: 1964 Size: SH
  5. Install the valve rocker arm nut.
  6. Use the J 5892-D in order to compress the valve spring.

    7. Object Number: 218211 Size: SH
  7. Use the J 38606 if clearance does not permit use of J 5892-D.

    8. Object Number: 69538 Size: SH
  8. Remove the valve stem keys (1).
  9. Carefully release the valve spring tension.
  10. Remove the J 5892-D or the J 38606 .
  11. Remove the valve spring cap (3) and valve spring (4).
  12. Remove the valve stem oil seal (2).

Installation Procedure

Tools Required

    • J 22794 Spark Plug Port Adapter
    • J 38606 Valve Spring Compressor
    • J 5892-D Valve Spring Compressor
    • J 42073 Valve Stem Seal Installer

    Object Number: 200320 Size: SH

    Important: The exhaust valve oil seal has the letters EX (1) molded into the top of the seal. The exhaust valve oil stem seal material is brown in color (2) with a white stripe (3) painted on the outside diameter of the seal.

  1. Assemble the valve into the proper valve guide.
  2. Select the proper valve stem oil seal for the specific valve guide.
  3. Lubricate the valve stem oil seal and guide with clean engine oil GM P/N 12345610 or equivalent.
  4. Assemble the valve stem oil seal onto the valve stem.

    5. Install the valve stem oil seal onto the valve guide using the J 42073 .

    Install the valve stem oil seal onto the valve guide until the J 42073 bottoms against the valve spring seat.


    Object Number: 36373 Size: SH
  5. Inspect the valve stem oil seal. The valve stem oil seal should not be bottomed against the valve guide. There should be a 12 mm (0.03937-0.07874 in) gap between the bottom edge of the valve stem oil seal and the valve guide.

    6. Object Number: 69538 Size: SH
  6. Install the valve spring (4).

    7. Object Number: 1964 Size: SH
  7. Use the J 5892-D in order to compress the valve spring.

    8. Object Number: 31730 Size: SH
  8. Use the J 38606 if clearance does not permit use of J 5892-D.
  9. Install the valve stem keys.

    10. Use grease in order to hold the valve stem keys in place.

  10. Carefully release the valve spring pressure, making sure the valve stem keys stay in place.

    11. Object Number: 65039 Size: SH
  11. Remove the J 5892-D or J 38606 and the J 22794 .

    12. Object Number: 172979 Size: SH
  12. Install the spark plugs. Refer to Spark Plug Replacement in Engine Electrical.

    13. Object Number: 68713 Size: SH
  13. Install the valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .