Swinger Tight Window Issue

The black plastic moves up and down with the glass.and the black plastic is what is in contact with the metal of the vent window frame.

The kits available are different than the originals. Which might be part of the issue.

If the vent window and side glass is installed I would loosen up all the fasteners and see how it feels.

Then start adjusting things.

I have read where others have put adhesive backed felt on the glass with cutouts for the plastic slides and had good success with that.