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Home >> Cadillac >> 2005 >> Escalade ESV >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (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 2005 GMC Yukon XL, 2005 Chevrolet Suburban, and 2005 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Compressing Valve Spring
    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 Valve spring compressor to the cylinder head.
    5. Install the valve rocker arm nut.
      IMPORTANT: Tighten the valve rocker arm nut enough to hold Valve spring compressorin place.
    6. Using Valve spring compressor compress the valve spring.
    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 Valve spring compressor.
  7. Remove the Valve spring compressorfrom the cylinder head.
  8. Remove the valve spring cap (2) and valve spring (3).
  9. Remove the valve stem oil seal (4).
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