Drainage System Check and Water Leak Corrections
DRAIN HOSES
The roof panel contains a drain trough that encircles the roof sliding outer glass panel. Attached to the roof panel are four sliding roof panel frame drain hoses. One sliding roof panel frame drain hose is attached at each corner of the roof panel. The two front sliding roof panel frame drain hoses are routed down the windshield pillars and into the cowl sides exiting at rocker panel drain holes. The ends of the sliding roof panel frame drain hoses are not reusable. The two rear sliding roof panel frame drain hoses are routed down the rear pillars forward of the rear wheelbase exiting at rocker panel drain holes.
NOTE: Prior to performing any services, verify that the drainage system is not plugged or restricted. Use a 473 ml (16 ounce) container and pour water into the drain trough. Look at the rear of the vehicle to make sure 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 making sure that the drainage system is not restricted, verify that gaps do not exist between the roof sliding panel seal and the roof panel. If a gap exists, the gap must be brought to specification before any further action is taken. Adjust roof sliding outer glass panel.
With clearances within specification and roof sliding outer glass panel closed, have an assistant spray water on the roof sliding outer glass 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 roof sliding panel seal and the roof panel.
SLIDING ROOF PANEL
The roof sliding outer glass panel has controlled water leak at the roof sliding panel seal. A properly adjusted roof sliding outer glass panel should result in a snug fit between the roof sliding panel seal and the roof panel around the entire opening. The fit can be checked by using a feeler gauge set at 0.25 mm (0.01 inch) between the roof sliding panel seal and roof panel. If these specifications are not maintained, water will overflow the drain troughs and enter the vehicle, running down into the passenger compartment when the vehicle is stopped abruptly. Also, increased wind noise could result if roof sliding outer glass panel clearances are not kept to these specifications.
WET HEADLINING-SIDES
If water drips from the roof headlining above the front door or quarter window, check to see if the sliding roof panel frame drain hoses are disconnected from the roof panel. Apply Weatherstrip and Rubber Adhesive E8AZ-19552-A or equivalent on drain tube nipple and insert sliding roof panel frame drain hose.
ROOF PANEL OVERCROWNED
If the roof panel is overcrowned to the contour of the roof sliding outer glass panel, this can cause wind noise or water leak conditions.
CAUTION: Excessive overbending could distort the roof, requiring costly metal finishing service. This procedure should be used only as a last resort.
Remove roof panel from vehicle and carefully overbend the center of the roof by applying downward pressure.
ROOF PANEL UNDERCROWNED
A roof panel scratch can be caused by the rear of the roof being slightly undercrowned.
CAUTION: Excessive overbending could distort the roof, requiring costly metal finishing service. This procedure should be used only as a last resort.
Open the roof sliding outer glass panel slightly and compare the contour of roof and roof sliding outer glass panel. If the roof panel appears flattened in the center and the roof sliding outer glass panel scuffs on the underside of the roof, arch the roof by pushing up on underside of roof to increase the roof panel arch.