Tools Required

1. Disconnect the negative battery cable. Refer to

   Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

   in General Information.
2. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .

Notice: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.

3. Remove the spark plug.

Important: Whenever valve train components are removed for service, they should be kept in order.

4. Remove the rocker arm and pushrod on the cylinder to be serviced. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .
5. Install J 23590 in the spark plug port and apply compressed air to hold the valves in place.



6. Compress the valve spring with J 5892-D and remove the valve locks and cap.
7. Carefully release the J 5892-D .



8. Remove the spring, valve stem oil seal and the spring seat.

Tools Required

1. Install the spring seat.
2. Install a new valve stem oil seal.
3. Set the valve spring and cap in place.



4. Compress the valve spring with J 5892-D .

Important: Make sure that the valve locks seat properly in the upper groove of the valve stem. Grease may be used to hold the locks in place while releasing the compressor tool.

5. Install the valve locks and carefully release J 5892-D .
6. Remove J 23590 .
7. Install the spark plug.

Tighten
Tighten the spark plug to 15 N·m (11 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Install the rocker arm and the pushrod. Refer to Valve Rocker Arm, Push Rod, and Stud Replacement .
9. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
10. Connect the negative battery cable.