Commander 4WD V8-4.7L (2008)
1. Remove the cylinder head cover See: Valve Cover/Service and Repair/Removal and Replacement/Cylinder Head Cover - Removal.
2. Using Special Tool 8516 Rocker Arm Remover (2), remove the rocker arms and the hydraulic lash adjusters.
3. Remove the spark plug for the cylinder the valve spring and seal are to be removed from.
4. Apply shop air to the cylinder to hold the valves in place when the spring is removed
NOTE: All eight valve springs and seals are removed in the same manner; this procedure only covers one valve seal and valve spring.
5. Using Special Tool 8426 Valve Spring Compressor, compress the valve spring.
NOTE: It may be necessary to tap the top of the valve spring to loosen the spring retainers locks enough to be removed.
6. Remove the two spring retainer lock halves.
NOTE: the valve spring is under tension use care when releasing the valve spring compressor.
7. Remove the valve spring compressor.
8. Remove the spring retainer, and the spring.
9. Remove the valve stem seal.
NOTE: The valve stem seals are common between intake and exhaust.
