Leaky Sunroof. - TCCoA Forums
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post #1 of 3 (permalink) Old 02-21-2005, 10:13 PM Thread Starter
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Leaky Sunroof.

Well I don't know if this has been covered. Searched and didn't find anything. It has been raining alot here lately( Houston area) and I notice that my headliner is wet. Figured it was coming from the sunroof. Any ideas from yall. The rubber seal is intact. Also, can yall tell me how to adjust the stupid thing. If I run it back all the way and then close it, it will keep going to the rear up position. It won't stop at close is what I'm getting at.
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post #2 of 3 (permalink) Old 02-22-2005, 09:10 AM
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From the 1993 Service Manual:

«Section 01-17: Moon Roof, Electric»


o Water Leaks

Possible Source(s):
§ Glass panel not properly aligned or fitted to roof.

Action(s) to Take:
§ Align to specifications.

Possible Source(s):
§ Glass panel not fully closing.

Action(s) to Take:
§ Adjust to specifications.

Possible Source(s):
§ Drain tubes not properly connected and/or blocked.

Action(s) to Take:
§ Connect properly and/or service or replace drain tubes as required.

Possible Source(s):
§ Cracks in housing.

Action(s) to Take:
§ Service as required.

Possible Source(s):
§ Glass assembly seal not properly in place and/or attached securely.

Action(s) to Take:
§ Install seal properly and/or attach correctly.

Glass Panel, Fore-and-Aft

1. Operate sliding glass panel to the full-open position.

2. Loosen 12 screws (including the single screw at each front rail corner) retaining the adjustable side rail covers.

3. Locate and use the series of hash marks at each front rail corner. Adjust glass panel fore or aft as required, making sure both sides are uniform to hash marks.

4. Tighten all retaining screws.

Hand tighten all screws. DO NOT use air tools or damage to holes in housing may occur.

Water Drainage System and Water Leak Corrections

Drain Hoses

The roof panel module contains the track assemblies, cable and drive mechanisms, and a drain trough that encircles the sliding panel. Attached to the module are four drain hoses. One drain hose is attached at each corner of the module. The two front drain hoses are routed down the windshield pillars and into the cowl sides exiting at rocker panel drain holes. The end of the hoses are not reusable. The two rear drain hoses are routed down the rear pillars forward of the rear wheelbase exiting at rocker panel drain holes.

Prior to performing any services, verify that the drainage system is not plugged or restricted. Use a 473ml (16 oz.) container and pour water into the drain trough. Look at the rear of the vehicle to ensure that the water drains from the rocker panels forward of the rear wheelhouse.

If the water flow is restricted, use compressed air to blow out any material in the drain hose system. Test by pouring water slowly into the system again.

After ensuring that the drainage system is not restricted, verify that gaps do not exist between the glass seal and the roof panel. If a gap exists, the gap must be brought to specification before any further action is taken. Adjust sliding panel as outlined.

With clearances within specification, and panel closed, have an assistant spray water on the sliding panel performing a visual inspection on the inside area to see if an excessive amount of water is entering the drain trough. A large volume of water indicates that an excessive clearance exists between the sliding panel seal and the roof.

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post #3 of 3 (permalink) Old 02-22-2005, 09:19 AM
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Additional information about the Moon Roof motor. Inspection checklist for the problem you described states to check for obstructions, etc. in the track, and make sure the drain tubes are not disconnected or clogged. Resynching the would help in getting the motor "just right" - much like a garage door opener would require so it doesn't open/close too much or too little:

Sliding Panel

The sliding panel has controlled water leak at the seals. A properly adjusted glass panel should result in a snug fit between the seal and the roof skin around the entire opening. The fit can be checked by using a feeler gauge set at 0.25mm (0.01 inch) between the seal and roof. If these specifications are not maintained, water will overflow the drain troughs and enter the module, running down into the passenger compartment when the vehicle is stopped abruptly. Also, increased wind noise could result if glass clearances are not kept to these specifications.

Wet Headlining--Sides

If water drips from the headlining above the door or quarter window, check to see if the drain tube(s) are disconnected from the module. Apply Weatherstrip Adhesive E8AZ-19552-A (ESB-M2G14-A) or equivalent, on drain tube nipple and insert drain hose.

Overcrowned Rear Roof Panel

If the roof panel is overcrowned to the contour of the sliding panel (at rear of sliding panel), this can cause wind noise or water leak conditions.

Excessive overbending could distort the roof panel, requiring costly metal finishing service. This procedure should be used only as a last resort.

Remove sliding panel from vehicle and carefully overbend the center of the roof panel by applying downward pressure.

Undercrowned Rear Roof Panel

A glass panel scratch can be caused by the rear of the roof panel being slightly undercrowned.

Excessive overbending could distort the roof panel, requiring costly metal finishing service. This procedure should be used only as a last resort.

Open the sliding panel assembly slightly and compare the contour of roof panel and glass panel. If the roof panel appears flattened in the center, and the glass scuffs on the underside of the roof panel, remove the sliding panel from the vehicle and arch the roof panel by pushing up on underside of roof panel to increase the roof panel arch.

Motor Synchronization (Timing)

The motor must be synchronized. Any time the moon roof motor is removed from the vehicle, it must be checked for synchronization before it is installed.

1. Operate glass panel until rear of glass panel is flush with sheet metal surface.

2. Remove motor access cover.

3. Remove two motor retaining screws.

4. Lower motor away from splined motor gear driveshaft of moon roof gear box.

5. Using control switch, operate motor until it is shut off by the microswitch. Check timing of motor (centerline of the gear, the hole in the cam and the centerline of the cam are aligned). Also, check that the notch in the cam for the microswitch and the microswitch are aligned.

If the motor is not synchronized, adjust it as follows:

a. Connect battery ground cable.

b. Connect motor wiring connector to moon roof wiring connector.

c. Operate control switch to advance motor drive gear until notch in cam and microswitch are aligned.

d. Disconnect motor wiring connector from moon roof wiring connector.

e. From the retracted position, crank glass panel assembly flush with roof panel.

6. To time moon roof, align yellow paint line on the splined motor shaft with the yellow paint mark on motor gear cover plate next to it. When these marks are in alignment, the moon roof and the motor are both synchronized.

7. Install motor onto splined motor gear driveshaft.

8. Install motor retaining screws.

9. Install motor cover.
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