Valve Springs

Valve Springs





Removal

1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury. Procedures

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Remove the camshaft roller followers. For additional information, refer to Camshaft Roller Follower Camshaft Roller Follower.

3. Position the piston at the top of the stroke.

4. Remove the spark plugs. For additional information, refer to Engine Ignition - 4.6L (2V) Spark Plugs.

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.





4. Remove the Valve Spring Compressor and Valve Spring Compressor Spacer.

5. Install the camshaft roller followers. For additional information, refer to Camshaft Roller Follower Camshaft Roller Follower.

6. Install the spark plugs. For additional information, refer to Engine Ignition - 4.6L (2V) Spark Plugs.

7. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury. Description and Operation

If equipped with a fire suppression system, repower the system.