[flyweight]

Cut the top off and use a “Easy Out” to remove the body of the vent.

 

[flyweight]

Insert the tool you have into the vent body and hit it with a hammer to seat it(make it bite). Then, try removing it.

 

[flyweight]

this is what's left.

Apply a generous amount of grease to a drill bit. Drill it through, then use the Easy Out.

Grabits are meant for use in removing screws with stripped screw heads.

 

[flyweight]

Jon, you're over thinking the situation.

Don't fret the little thing.

A drill bit will not injure the internals.

 

[flyweight]

Apply a generous amount of grease to a drill bit.

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Probably not but it's really easy to have shavings drop down into the gears. Those can eat a seal in a hurry.

That is why I mentioned to apply grease to the drill bit. It's something we mechanics have done many time without fail.