Yukon XL 4WD V8-5.3L (2011)
Valve Guide Seal: Service and Repair
Valve Stem Oil Seal and Valve Spring Replacement
Special Tools
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J 22794 Spark Plug Port Adapter
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J 38606 Valve Spring Compressor
Removal Procedure
1. Remove the rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement See: Camshaft, Lifters and Push Rods/Rocker Arm
Assembly/Service and Repair.
2. Disconnect the spark plug wire at the spark plug.
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Twist each plug wire boot 1/2 turn.
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Pull only on the boot in order to remove the wire from the spark plug.
Note: 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. Install the J 22794 into the spark plug hole.
7. Attach an air hose to the J 22794 .
8. Apply compressed air to the J 22794 in order to hold the valves in place.