Yukon/Denali 4WD V8-4.8L VIN V (2005)
Valve Guide Seal: Service and Repair
Valve Stem Oil Seal and Valve Spring Replacement
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Tools Required
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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.
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.
3. Important: Remove the spark plugs from the cylinder head with the engine at room temperature.
Loosen the spark plug 1 or 2 turns.