Sierra 2500 4WD V8-6.6L DSL Turbo (2007)
9. Remove the valve keys (1) from the valve stem.
10. Carefully release the valve spring tension.
11. Remove the valve spring upper seat (2) and the valve spring (3).
12. Remove the valve stem oil seal (4).
13. Remove the valve spring lower seat (5).
14. Continue removing the remaining valve stem seals for the cylinder using the above procedure.
Installation Procedure
Notice: Air pressure should remain applied to the cylinder for installation.
1. Install the valve spring lower seat.
2. Install the valve stem seal using J 44640.