Valve Guide Seal: Service and Repair

REMOVAL PROCEDURE

^ Tools Required
- J22794 Spark Plug Port Adapter
- J38606 Valve Spring Compressor (Head-on)
- J42078 Valve Seal Installer





1. Remove the spark plugs from the cylinders to be serviced.
2. Remove the valve rocker arms, pedestal, and valve pushrods.





3. Install J22794 Spark Plug Port Adapter to the spark plug hole.
4. Apply compressed air in order to retain the valves in their closed position.





5. Compress the valve spring (4) using J38606 Valve Spring Compressor (head on).
6. Remove the valve stem keys (2).
7. Release the valve spring compressor.
8. Remove the valve spring cap (3).
9. Remove the valve spring (4).
10. Remove the valve stem oil sea[ (5).

INSTALLATION PROCEDURE

IMPORTANT: 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 (5) onto the guide (7).
1.1. Lubricate the valve guide (7) and valve stem (5) 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. Push or lightly tap the J42078 until the tool bottoms against the valve spring shim (6).





2. Measure the valve stem oil seal for the properly installed height.
There should be a 18.1 - 19.1 mm (0.712 - 0.752 inch) 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. Compress the valve spring (4) using the J38606.
6. Install the valve stem keys (2).
6.1. Use grease to hold the keys (2) in place and remove the J38606.
6.2. Make sure the keys (2) seat properly in the groove of the valve stem (10,12).
6.1. Tap the end to the valve stem (10, 12) with a plastic faced hammer to seat the keys (if necessary).





7. Remove the J22794.

NOTICE: Refer to Fastener Notice in Service Precautions.





8. Install the spark plug.
^ Tighten the spark plug to 15 Nm (11 ft. lbs.).
9. Install the valve rocker arms, pedestal, and valve pushrods.