What Causes the Rattling Noise When the Car Window is Fully Closed on Bumpy Roads?
2 Answers
Window rattling noise may be caused by abnormal width of the window glass guide channel. This leads to friction between the glass and other parts when driving on bumpy roads, resulting in the noise. Below is an introduction about car windows: 1. Introduction: Car windows are openings in the four walls of the vehicle compartment, designed to block wind and rain without obstructing vision. They are generally made of glass materials, which have evolved significantly over time. 2. Classification: Safety glass - including laminated glass, tempered glass, and zone-tempered glass, among others, has greatly improved the performance of automotive glass. 3. Composition: Ordinary automotive glass is made of silica glass, with silicon dioxide content exceeding 70%, and the rest composed of sodium oxide, calcium oxide, magnesium, etc.
My car also had this annoying rattling noise some time ago. When the windows were fully closed and driving on rough roads, it would creak and squeak. After a long struggle, I found out it was caused by the aging and hardening of the door seals. The rubber lost its elasticity and rubbed against the window glass during bumps. Another easily overlooked cause is the accumulation of sand and dust in the window tracks, which can create noise after raising and lowering the window a dozen times. Loose clips on the door panel can also cause squeaking. Last time I removed the door trim, I found the wiring harness inside wasn’t secured properly and was hitting the metal door panel during bumps. The most troublesome issue is a deformed window regulator bracket—my neighbor’s car had this problem and had to replace the entire assembly to fix it. If you hear a metal clanking sound, be sure to check if the screws on the glass mounting bracket are loose.
