Sierra Classic 2500 4WD V8-8.1L (2007)
Valve Guide Seal: Service and Repair
Valve Stem Oil Seal and Valve Spring Replacement
Tools Required
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J 5892-D Valve Spring Compressor
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J 22794 Spark Plug Port Adapter
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J 43105 Valve Stem Seal Installer
Removal Procedure
1. Remove the valve rocker arms and pushrods.
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.
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.
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 J 5892-D to the cylinder head.
5. Install the valve rocker arm nut.
Important: Tighten the valve rocker arm nut enough to hold J 5892-D in place.
6. Using J 5892-D compress the valve spring.
