The glass panel and seal is designed to controll water entry at the seal. A properly adjusted glass panel will result in a snug fit between the seal and the roof. Inspect the alignment by inserting a piece of paper between the roof and seal. Maintenance of minimal gap is essential for assuring that more water does not enter the car than the sunroof actuator drains channels can handle. Also, objectionable windnoise could result if gap clearances are exceeded. All adjustment to the glass panel, and roof are made by adjusting the height and centering of the glass panel.

Adequate drainage is provided by a drain channel in the sunroof actuator which encircles the glass panel and leads to drain hoses located at each corner of the sunroof actuator.

In addition, a drain channel spans the rear of the sunroof actuator and directs water into the trough. The front drain hoses are routed down the windshield pillars and out. The two rear drain hoses are routed down from the top of each side of the roof and down through the quarter panels and out the bottom. Refer to Rear Quarter Upper Trim Panel Replacement in Interior Trim.

If a wet headliner or other waterleak complaints are encountered, prior to performing any adjustment, first verify that the drainage channels are not plugged or disconnected. Use a pint size container to pour water into the sunroof actuator drain trough. If water flow is restricted, use compressed air to blow out any material plugging the drain channels. Test channels again.

To further inspect for disconnected drain hoses, partial access (without removing the headliner) may be obtained by removing windshield garnish molding and/or upper rear quarter trim finish panel. Refer to Rear Quarter Upper Trim Panel Replacement in Interior Trim.