Grand Marquis V8-4.6L Flex Fuel (2010)
Removal
1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in
Vehicle Jacking and Lifting. Failure to follow the instructions may result in serious personal injury.
With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Vehicle Jacking and Lifting.
2. Remove the camshaft roller followers. For additional information, refer to Camshaft Roller Follower See: Rocker Arm Assembly/Service and
Repair/Removal and Replacement/Camshaft Roller Follower.
3. Position the piston at the top of the stroke.
4. Remove the spark plugs. For additional information, refer to Ignition System.
5. Install compressed air in the cylinder to hold both valves in position.
6. NOTICE: 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 or engine damage may occur.
Using the Valve Spring Compressor, compress the valve springs.
7. Remove the valve spring retainer keys, the valve spring retainer and the valve spring.
Installation
1. Position the valve spring and the valve spring retainer.
2. Install the Valve Spring Compressor Spacer between the valve spring coils to prevent valve stem seal damage.
3. Using the Valve Spring Compressor, compress the valve spring. Install the valve spring retainer keys.
