LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 126 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (2 Of 5)) >> On-Vehicle Repair Instructions (1 Of 2) >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Spark Plug Wire & Boot
    GM343699Courtesy of GENERAL MOTORS CORP.
  1. Remove the rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement .
  2. Disconnect the spark plug wire at the spark plug.
    • Twist each plug wire boot 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 & Spark Plug 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 air blast away any dirt or debris from around the spark plug.
  5. Remove the spark plug.
    6. Fig 3: Applying Compressed Air To J 22794
    GM310140Courtesy of GENERAL MOTORS CORP.
  6. Install the J 22794  into the spark plug hole. See Special Tools .
  7. Attach an air hose to the J 22794  . See Special Tools .
  8. Apply compressed air to the J 22794  in order to hold the valves in place. See Special Tools .
    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. See Special Tools .
    10. Fig 5: View Of Valve Components
    GM1559870Courtesy of GENERAL MOTORS CORP.
  10. Remove the valve stem keys (225).
  11. Carefully release the valve spring tension.
  12. Remove the J 38606  . See Special Tools .
  13. Remove the valve spring cap (224).
  14. Remove the valve spring (223).
  15. Remove the valve stem oil seal (222).
  16. Remove the valve (228).
scientia non olet · About LEMON Manuals