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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1537 (Engine Mechanical (Repair Instructions 1 Of 3) - 5.7L) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1 >> On-Vehicle Repair Instructions >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Spark Plug Wire
    GM74069Courtesy of GENERAL MOTORS CORP.
  1. Remove the valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  2. Remove the spark plug wire from the spark plug for the cylinder to be serviced.
    • Twist the plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from the spark plug.
    3. Fig 2: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Remove the spark plugs from the cylinder head with the engine at room temperature.
  3. Loosen the spark plug 1 or 2 turns.
  4. Brush or use compressed air to remove any dirt or debris around the spark plug.
  5. Remove the spark plug.
    6. Fig 3: Install/Remove J 22794 Spark Plug Hole
    GM353918Courtesy of GENERAL MOTORS CORP.
  6. Install the J 22794  into the spark plug hole.
  7. Attach an air hose to J 22794  .
  8. Tap the end of the valve stem with a plastic face hammer in order to loosen any varnish on the valve stem keys.
    9. Fig 4: Compress The Valve Spring (Cylinder Head Installed) Using Special Tools
    GM218211Courtesy of GENERAL MOTORS CORP.
  9. Use the J 38606  in order to compress the valve spring.
    10. Fig 5: Valve Stem Keys
    GM721939Courtesy of GENERAL MOTORS CORP.
  10. Remove the valve stem keys (3).
  11. Carefully release the valve spring tension.
  12. Remove the J 38606  .
  13. Remove the valve spring cap (4).
  14. Remove the valve spring (5).
    IMPORTANT: A second design valve stem oil seal and shim may be used on later engines.
    A separate spring shim is not required with the second design seal and shim.
  15. Remove the valve stem oil seal (6) (first design).
  16. Remove the valve spring shim (7) (first design).
  17. Remove the valve stem oil seal and shim (2) (second design).
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