The sealing rings are synthetic resin with chamfered ends. Check the condition of the sealing rings, and replace them only if they are worn, distorted, or damaged.
For a better fit, squeeze sealing rings together slightly before installing them.

Apply ATF to the new sealing rings, then install them on the secondary shaft.

After installing the sealing rings, verify the following:
The rings are fully seated in the groove.
The rings are not twisted.
The chamfered ends of the rings are properly joined.
Reporting Safety Defects (U.S. Vehicles)
If you believe that your vehicle has a defect which could cause a crash or could
cause injury or death, you should immediately inform the National Highway Traffic
Safety Administration (NHTSA) in ...
Rocker Arm Assembly Removal
Remove the cylinder head cover.
Loosen the rocker arm adjusting screws (A).
Unscrew the rocker shaft mounting bolts two turns at a time in the
sequence shown.
...
Place Name
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► Place Name
Enter the name of a place (e.g., business, hotel, restaurant) stored in the
map
database to use as the destination.
1. Enter a place name.
2. Select List to di ...