What is the reason for the rattling sound when driving with the window open?
2 Answers
The reasons for the rattling sound when driving with the window open are: 1. Lack of lubrication in the sunroof sliding track; 2. Wear of transmission bearings or gears; 3. Excessive wear of the brake band clutch in the transmission. The functions of car windows are: 1. To shield from wind and rain, and to reduce noise; 2. To reduce wind resistance and guide airflow; 3. To protect the safety of passengers; 4. To lower the temperature inside the car. Methods for maintaining car windows include: 1. Using windshield washer fluid according to the season; 2. Applying heat-insulating film to the car glass. The cleaning methods for car windows are: 1. Pouring water from the top of the vehicle and wiping off dirty water with a sponge; 2. Spraying glass cleaner evenly onto the glass with a high-pressure spray bottle; 3. Drying the glass with a soft cloth.
I encountered the same situation a few days ago. After careful inspection, I realized it was small stones picked up by the tires hitting the wheel arch liners. The sound was more noticeable when the windows were open, like someone tapping the underside of the car with a small hammer. Deep tire treads are particularly prone to picking up stones, especially when driving on gravel roads. Besides stones, receipts placed near the window fluttering in the wind can also make a tapping sound. Once, I spent a long time on the highway trying to figure out the cause because of this. I recommend first emptying the door storage compartments and then checking the wheel arches for any embedded stones or branches. The tricky part about these kinds of noises is that you have to eliminate possibilities one by one yourself.
