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Home >> Cadillac >> 2006 >> Escalade AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 786 (Engine Mechanical - 8.1L) >> 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 car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Compressing Valve Spring Using J 5892-D
    GM1964Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Rotate the piston in the cylinder being serviced to the bottom of its stroke, to ensure that the engine does not rotate when the compressed air is applied.
  1. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  2. Rotate the crankshaft until both valves are closed before installing the compressed air into the cylinder.
  3. Remove the spark plug from the cylinder being serviced. Refer to Spark Plug Replacement in Engine Controls - 8.1L.
  4. Remove the valve stem keys as followed:
    1. Install the J 22794  into the spark plug hole.
    2. Apply compressed air into the cylinder in order to hold the valves closed.
    3. Lightly tap the valve spring cap to loosen the valve stem keys.
    4. Install the J 5892-D  to the cylinder head. See Special Tools .
    5. Install the valve rocker arm nut.
      IMPORTANT: Tighten the valve rocker arm nut enough to hold J 5892-D  in place. See Special Tools .
    6. Using J 5892-D  compress the valve spring. See Special Tools .
    5. Fig 2: View Of Valve Stem & Spring Components
    GM843856Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not release the compressed air from the cylinder being worked on. The valve will fall into the cylinder bore.
  5. Remove the valve stem keys (1).
  6. Slowly release the J 5892-D  . See Special Tools .
  7. Remove the J 5892-D  from the cylinder head. See Special Tools .
  8. Remove the valve spring cap (2) and valve spring (3).
  9. Remove the valve stem oil seal (4).
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