Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Remove the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement .
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.
  
  Fig 1: Disconnecting Spark Plug Wire
  Courtesy of GENERAL MOTORS CORP.
Important: Remove the spark plugs from the cylinder head with the engine at room temperature.
Loosen the spark plug 1 or 2 turns.
Brush or air blast away any dirt or debris from around the spark plug.
Remove the spark plug.

Fig 2: Removing Spark Plug
Courtesy of GENERAL MOTORS CORP.
Install J 22794 into the spark plug hole.
Attach an air hose to J 22794 .
Apply compressed air to J 22794 in order to hold the valves in place.

Fig 3: Installing J 22794 Into Spark Plug Hole
Courtesy of GENERAL MOTORS CORP.
Use J 38606 in order to compress the valve spring.

Fig 4: Compressing Valve Spring Using J 38606
Courtesy of GENERAL MOTORS CORP.
Remove the valve stem keys (2).
Carefully release the valve spring tension.
Remove the J 38606 .
Remove the valve spring cap (3).
Remove the valve spring (4).
Remove the valve stem oil seal and shim (1,5).

Fig 5: Removing Valve Spring, Valve Stem Oil Seal & Components
Courtesy of GENERAL MOTORS CORP.