Tools Required

1. Remove the engine cover from the vehicle. Refer to Engine Cover Replacement in Interior Trim.
2. Disconnect the battery negative cables from the batteries. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

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

3. Remove the valve rocker arm, shaft, and the push rod from the cylinder being serviced. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .
4. Remove the glow plugs from the cylinder being serviced. Refer to Glow Plug Replacement - Bank 1 and Glow Plug Replacement - Bank 2 in Engine Controls-6.5L (L65).
5. Modify the J 26999-10 and the J 26999-30 . A valve core is used to prevent the lost of engine compression when using for compression test.

5.1.	Remove the valve core from the J 26999-10 or the J 26999-30 .

5.2.	Remove the quick connect fitting from the J 26999 .

5.3.	Adapt the quick connect fitting in order to use for shop air.

Important: Rotate the cylinder to be serviced to the bottom of the stroke. This is to ensure that the engine does not rotate when the compressed air is applied to the cylinder being serviced.

6. Install the J 26999-10  (2) or the J 26999-30 into the glow plug hole.
7. Apply compressed air to hold the valves in place. If the compressed air is released, the valves can drop into the cylinder.

Caution: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

Notice: Completely engage the J 38606 jaws on the valve spring. The J 38606 may slip off and scratch the valve spring. Replace the valve spring if the valve spring becomes scratch.

8. Use the J 38606  (1) in order to compress the valve spring. If the spring will not compress, tap on the tool lightly with a mallet in order to loosen the cap or rotator from the valve keys.



9. Remove the valve keys from the valve stem (exhaust valve shown).
10. Carefully release the valve spring tension.
11. Remove the cap or the rotator, the shield, and the valve spring with the damper (exhaust valve shown).
12. Remove the valve stem oil seals.

Notice: Air pressure should remain applied to the cylinder for installation.

1. Apply a small amount of clean engine oil to the valve stem.
2. Install the new valve stem oil seals.
3. Install the valve spring with the damper, the shield, and the cap or the rotator (exhaust valve shown).




Caution: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

Notice: Completely engage the J 38606 jaws on the valve spring. The J 38606 may slip off and scratch the valve spring. Replace the valve spring if the valve spring becomes scratch.

4. Install the valve keys. Use grease in order to hold the valve keys in place.

Notice: The valve stem keys must correctly seat in the valve spring cap. Engine damage may occur by not installing properly.

5. Carefully release the valve spring pressure. Make sure the valve keys stay in place.
6. Remove the J 38606  (1).
7. Remove the J 26999-30  (2) or the J 26999-10 .
8. Install the glow plugs to the cylinder being serviced. Refer to Glow Plug Replacement - Bank 1 and Glow Plug Replacement - Bank 2 in Engine Controls-6.5L (L65).
9. Install the valve rocker arm, shafts, and the push rod to the cylinder being serviced. Refer to Valve Rocker Arm, Shaft, and Push Rod Replacement .
10. Install the engine cover to the vehicle. Refer to Engine Cover Replacement in Interior Trim.
11. Connect the battery negatives cables to the batteries. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.