Explorer 4WD V8-4.6L (2008)
Removal
1. Depending on the valve spring being serviced, remove the LH or RH valve cover.
2. Remove the spark plug.
3. Rotate the crankshaft until the piston for the valve spring being serviced is at the top of its stroke with the intake valve and the exhaust valves
closed.
4. CAUTION: If the components are to be reinstalled, they must be installed in their original positions. Mark the components for
installation into their original locations. Failure to follow these instructions may result in engine damage.
NOTE: Do not allow the valve keepers to fall off of 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 camshaft roller follower.
5. 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.
6. CAUTION: If the components are to be reinstalled, they must be installed in their original positions. Mark the components for
installation into their original locations. Failure to follow these instructions may result in engine damage.
NOTE: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve to fall into the cylinder. If
air pressure must be removed, support the valve prior to removal. If a valve drops into the cylinder, remove the cylinder head.
Using the special tool, compress the valve spring and remove the valve spring retainer keys.
