Why is the wiper making a scraping noise?
2 Answers
The reasons for the wiper making a scraping noise are: 1. The wiper blade has aged and hardened; 2. There is a foreign object between the wiper blade and the windshield; 3. The linkage mechanism is deformed or there is a problem with the motor clearance relay, etc.; 4. If the wiper moves too fast, too slow, or continuously, it is because the angle of the wiper arm is incorrect. The wiper, also known as the windscreen wiper, is a device used to remove raindrops and dust attached to the vehicle's windshield, improving the driver's visibility and increasing driving safety. The wiper is composed of a motor, reducer, four-bar linkage mechanism, wiper arm spindle, wiper blade assembly, etc.
This wiper blade squeaking is really annoying, I've encountered it several times while driving. I remember last rainy season, every time I turned on the wipers, they made this screeching sound that made my scalp tingle. Most likely, the wiper blades have aged and hardened, especially when the rubber deteriorates over time and becomes brittle, causing loud friction noises when wiping. Another possibility is dirt on the windshield, like bird droppings, oil film, or dust, preventing the blades from sliding smoothly. A common reason could also be loose wiper arm springs or improper installation, leading to uneven pressure and resulting in that annoying scraping sound. When dealing with it, I first thoroughly clean the glass and wiper blades with a wet cloth, adding some glass cleaner to remove grease. If that doesn't work, it's time to replace the wiper blades—just a few bucks to solve the problem. Don't delay; the noise can be too distracting while driving.
