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.
Throttle Body Cleaning
caution
Do not insert your fingers into the installed throttle body when you
turn the ignition switch to ON (II) or while the ignition switch is in
ON (II). If you d ...
Brake Hose Replacement
notice
Do not spill brake fluid on the vehicle; it may damage the paint. If
brake fluid gets on the paint, wash it off immediately with water.
NOTE:
Bef ...
Charging the Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical
system.
Always disconnect the negative (–) cable first, and reconnect it last. ...