Technical Motorcraft Starter Solenoid Query.

This is probably a pointless question.
Picked up a Motorcraft starter solenoid since mine went missing off an OT car.
Upon removing the solenoid on the metal back plate there is a felt where there is normally either a bump or nothing.


Is this merely a vent or does it require a drop of oil from time to time, like on old fan motors that would use a reservoir felt pad to keep the end bearing lubed.
It's been a while since the car had an original solenoid so I can't remember if it has the same 'vent' or if this is an engineering update.

Box has SW-7663 / B6AZ-11450B / 3303619
Solenoid is stamped Motorcraft D2AF-11450-AA

Thanks.

 

Just a vent.... You don't want any oil inside an electrical switch.

 

As suspected, excellent. Thanks Steve.

 

Mike, If you have an old solenoid grind off the rivets and take it apart. Pretty interesting inside.