Sierra Classic 2500 4WD V8-6.0L (2007)
1. Clean the cylinder head valve spring seat and/or shim area.
2. Lubricate the valve guide and valve stem oil seal with clean engine oil.
3. Install the valve stem oil seal and shim (1, 5).
4. Install the valve spring (4).
5. Install the valve spring cap (3).
6. Compress the valve spring using the J 38606.
7. Install the valve keys.
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Use grease in order to hold the valve keys in place.
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Make sure the keys seat properly in the groove of the valve stem.
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Carefully release the valve spring pressure, making sure the valve keys stay in place.
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Remove the J 38606.
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Tap the end of the valve stem with a plastic faced hammer to seat the keys, if necessary.
8. Remove the J 22794 from the spark plug port.
