Tools Required

1. Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .



2. Remove the valve rocker arms, pedestal, and valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Remove the spark plugs from the cylinders to be serviced. Refer to Spark Plug Replacement .



4. Install J 22794 into the spark plug hole.
5. Apply compressed air in order to retain the valves in the closed position.



6. Compress the valve spring (4) using J 38606 .
7. Remove the valve stem keys (2).
8. Remove the valve spring (4).
9. Remove the valve spring cap (3).
10. Remove the valve stem oil seal (5).

Notice: The valve stem oil seal alignment and position on the valve guide is critical.

An improperly installed valve stem oil seal may lead to excessive oil consumption, increased vehicle emissions, or component damage.
1. Install the valve stem oil seal onto the guide.

1.1.	Lubricate the valve guide and valve stem oil seal with clean engine oil.

1.2.	Install the valve stem oil seal onto the valve stem. Push the seal down until the seal contacts the valve guide.

1.3.	Use the J 42078 in order to install the oil seal.

Push or lightly tap the tool until the tool bottoms against the valve spring shim.




2. Measure the valve stem oil seal for the properly installed height.

There should be a 18.11 mm to 9.1 mm (0.712 in to 0.752 in) gap between the top edge of the oil seal body and the shim spring seat surface.




3. Install the valve spring (4).
4. Install the valve spring cap (3).
5. Install the valve stem keys (2).

5.1.	Use grease to hold the keys (2) in place and remove J 38606 .

5.2.	Make sure the keys (2) seat properly in the groove of the valve stem (10 and 12).

5.3.	Tap the end to the valve stem (10 and 12) with a plastic faced hammer to seat the keys (if necessary).




6. Disconnect the J 22794 .




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.

7. Install the spark plugs.

Tighten

•	Tighten the spark plugs (Cylinder Head-New) to 20 N·m (15 lb ft).

•	Tighten the spark plugs (Cylinder Head-all Subsequent Installations) to 15 N·m (11 lb ft).

8. Install the valve rocker arms, pedestal, and valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .



9. Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .