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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 5.7L (LS6)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  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.
    Fig 1: Spark Plug Wire Routing
    GM74069Courtesy of GENERAL MOTORS CORP.
    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: Identifying J 22794
    GM353918Courtesy of GENERAL MOTORS CORP.
  6. Install the J 22794  into the spark plug hole. See Special Tools and Equipment .
  7. Attach an air hose to J 22794  . See Special Tools and Equipment .
  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: View Of Valve Spring & Stem Components
    GM1378970Courtesy of GENERAL MOTORS CORP.
  10. Remove the valve stem keys (5).
  11. Carefully release the valve spring tension.
  12. Remove the J 38606 .
  13. Remove the valve spring cap (4).
  14. Remove the valve spring (3).
  15. Remove the valve stem oil seal and shim (2).
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