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Home >> GMC Truck >> 2011 >> Sierra 2500 Denali 4WD V8-6.6L DSL Turbo >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Service and Repair >> Overhaul >> 25. Cylinder Head Assemble

25. Cylinder Head Assemble




Cylinder Head Assemble

Special Tools
* EN 49761 - Valve Stem Seal Installer
* J 8062 - Valve Spring Compressor

For equivalent regional tools, refer to Special Tools (Special Tools).





Note: Lubricate the valve stem with clean engine oil before installing.

1. Install the valves into the cylinder head.
2. Install the valve spring lower seat.




3. Install the valve stem seal using the EN 49761 - installer. Tap the EN 49761 - installer until it bottoms on the valve spring lower seat.
4. Install the valve spring with the painted end towards the cylinder head.
5. Install the valve spring upper seat.




6. Use the J 8062 - compressor to compress the valve spring.
7. Install the valve keys.
8. Remove the J 8062 - compressor from the cylinder head.




9. Measure the valve installed height using a ruler. Measure from the base of the valve spring to the top of the valve. Refer to Engine Mechanical Specifications (Service Limits & General Specifications).
10. Install the remaining valves, springs, and other components.

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