Tools Required

Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Remove the valve rocker arm cover from the cylinder head. Refer to Valve Rocker Arm Cover Replacement .



3. Remove the valve rocker arm shaft from the cylinder head. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .



4. Remove the pushrods from the cylinder head. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .



5. Remove the glow plug from the cylinder being serviced. Refer to the appropriate procedure in Engine Controls:

•	Glow Plug Replacement - Left Side or Glow Plug Replacement - Right Side (L65)

•	Glow Plug Replacement - Left Side or Glow Plug Replacement - Right Side (L57)

6. Rotate the crankshaft until the piston in the cylinder being serviced is at the bottom of the piston stroke.
7. When applying the compressed air to the cylinder being serviced, use the J 26999-10 for left side of the engine and J 26999-30 for the right side of the engine.
8. Apply compressed air into the cylinder being serviced.



9. Tap lightly on the valve spring cap or the rotator in order to loosen the valve keys.
10. Use the J 38606
11. Remove the valve keys from the retainer in the cylinder head.
12. Carefully release the valve spring tension and remove the J 38606
13. Remove the following components from the cylinder head:

•	The valve spring

•

The cap

•	The rotator

•	The shield

14. Remove the valve stem oil seal from the valve stem.

Tools Required

Important: The air pressure should remain applied to the cylinder being serviced until after the repair has been completed.

1. Apply a small amount of clean engine oil to the valve stem and to the new valve stem oil seal.
2. Install the valve stem oil seal to the valve stem.



3. Install the following components:

•	The valve spring

•

The cap

•	The rotator

•	The shield

4. Use the J 38606 in order to compress the valve spring.
5. Install the valve keys in the retainer.
6. Remove the J 38606 from the valve spring.
7. Slowly release the compressed air from the cylinder being serviced.
8. Remove the J 26999-10 when working on the left side of the engine or the J 26999-30 for the right side of the engine.



9. Install the glow plug into the cylinder being serviced. Refer to the appropriate procedure in Engine Controls:

•	Glow Plug Replacement - Left Side or Glow Plug Replacement - Right Side (L65)

•	Glow Plug Replacement - Left Side or Glow Plug Replacement - Right Side (L57)





Important: All the valve train components must be reassembled in the exact order and position from which the components were removed.

10. Install the pushrods into the cylinder head. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .
11. Install the valve rocker arm shaft to the cylinder head. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .



12. Install the valve rocker arm cover to the cylinder head. Refer to Valve Rocker Arm Cover Replacement .
13. Connect the negative battery cable.