Is it normal for water to seep into the sunroof drainage channel?
1 Answers
It is normal for water to seep into the sunroof drainage channel. The left and right sides of the sunroof are sliding rails that ensure the sunroof can move back and forth. At the front corners of these rails are the sunroof's drainage holes. If the drainage pipe is clogged or broken, water will seep out from the sunroof gap and drip into the interior. A broken pipe can also cause water to seep into the car's A-pillar or C-pillar. Another issue is aging of the sunroof's sealing strip, which can lead to water seepage. Below are details about sunroof leaks: Dirt and debris in the rails: If the sunroof drainage pipe is clogged, excessive rainwater cannot drain and may seep into the car's headliner through the sunroof's waterproof seal. This can usually be resolved by using a thin wire to unclog the drainage pipe. Deformed sliding rails: Rail deformation typically occurs due to obstruction, forcing the motor to push the sunroof back and forth, causing stretching and deformation. This prevents the sunroof glass from closing properly, allowing rainwater to enter the car. If there are no separate rail components available, the entire sunroof frame assembly may need replacement. Broken lift arms: If the lift arms break after the sunroof slides to the front and closes, the sunroof cannot lift flush with the roof, creating a depression where rainwater can leak in along the edges. This also requires replacing the entire frame assembly. Aging waterproof seals: Especially in cars over 10 years old, aged seals may not form a tight seal with the roof, allowing rainwater to seep in.
