E 450 V10-6.8L (2008)
6. Remove the spark plug. For additional information, refer to Ignition System.
7. Use compressed air in the cylinder to hold both valves in position.
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Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.
8. CAUTION: The camshaft roller followers must be installed in their original locations. Failure to follow these instructions may result in
engine damage.
NOTE: Do not allow the valve keepers to fall off the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder
head must be removed.
NOTE: It may be necessary to push the valve down while compressing the spring.
Using the special tool, compress the valve spring and remove the valve spring retainer keys.
9. Remove the valve spring retainer and the valve spring.
10. Repeat the previous 7 steps for each valve spring being serviced.
11. NOTE: Lubricate the camshaft roller follower with clean engine oil prior to installation.
To install, reverse the removal procedure.
