Window Knocking

[Vza]

Hi All, 99 Boxster Base. My R window makes a knocking sound when its down and happens when closing the door. Upon inspection the front part of the window is hitting the front top "cable wheel" of the regulator. Is there a piece of foam or rubber missing from the top of the regulator. I can probably cure it by cementing a small piece of rubber to the top mount to avoid glass to metal contact. Thanks V

[rexcramer]

I have replaced both regulators and do not remember any foam in the area you are noting. Take a look at the pictures in the tech article for more info. I think your glass may just be loose from the pinch clamps. Or the regulator is loose from the door. Does the window open and close correctly?

https://www.pelicanparts.com/techarticles/Boxster_Tech/77-BODY-Window_Regulator/77-BODY-Window_Regulator.htm

Thanks Pelican for all of the tech help.

[Vza]

Yes window works properly everything is tight. Window is a about 1/2 inch from top roller and track assembly. When you shut the door it smacks the the roller. The nylon guide in the track my be worn causing the window to wobble.

[Vza]

Fixed ....Window stop bumper was in the lower (incorrect) notch on the rail. Window was too low and totally missing the weather stripping.

[piper6909]

Originally Posted by Vza

Fixed ....Window stop bumper was in the lower (incorrect) notch on the rail. Window was too low and totally missing the weather stripping.

Great job! Thanks for posting the solution!