What causes the sunroof leakage in GAC Trumpchi M8?
2 Answers
GAC Trumpchi M8 sunroof leakage is mostly caused by blocked drainage pipes, while door leakage is generally due to aging window seals or clogged door drainage holes. Below is a detailed analysis of the specific reasons for sunroof leakage: Poor rainwater drainage: Blocked sunroof drainage outlets can lead to poor rainwater drainage, gradually seeping into the car. This phenomenon mainly occurs when the owner fails to regularly clean the roof, allowing debris to flow with rainwater and clog the drainage outlets. This issue can be addressed by using a wire hook to remove the debris from the drainage hole or by visiting a repair shop to use an air gun to blow out the debris. Damaged sunroof seal: The sunroof seal is made of rubber, which can age over time and become damaged due to repeated friction with the sunroof glass, leading to poor sealing and leakage during rainy weather. In such cases, it is important to regularly inspect the aging condition of the seal and replace it promptly if damaged. Choose a seal with good performance, resistant to aging and corrosion. Roof deformation: If the car is involved in a collision, the body may deform. If not properly restored during repairs, it can result in poor sealing and leakage. When repairing accident-damaged cars, it is essential to strictly adhere to the original vehicle standards; otherwise, parts may not fit properly, creating potential leakage issues.
My GAC M8 also had a sunroof leakage issue last year, and I found there are mainly three problematic areas. The rubber seals around the sunroof tend to age and crack over time, especially for cars frequently exposed to sunlight—once the seals deform, they can't close tightly. Additionally, the drainage holes at the four corners of the sunroof are easily clogged by dust and leaves, causing rainwater to seep into the car when it can't drain properly. Another time, I noticed a loose connection in the drainage pipe during a car wash, which let water flow directly into the headliner. Since then, I’ve been using a thin wire to clear the drainage holes every quarter and always check the seals after washing the car. It hasn’t leaked for over a year now. I recommend parking away from trees when possible and asking the mechanic to inspect these areas during regular maintenance.
