You’re reading this article for more information about how to adjust windshield wiper arm tension for your vehicle and this is important for the wiper arm to apply sufficient pressure, it will allow the wiper blade to operate correctly and effectively.
Insufficient or lacking arm pressure can cause the center of the wiper blade to miss a section while wiping, and excessive wiper pressure can cause chattering noise and/or the ends of the wiper to
There are several reasons the pressure from your wiper arm is lacking;
- Age/Stretched Spring
If your wiper arm is lacking pressure due to age/rust/corrosion, you can try spray a lubricant such as WD40 on the spring and the pivot point, see image below.
You can check the wiper arm pressure using a special tool. One ounce per inch of blade length is optimal.
If the spring is stretched, the wiper arm will need to be replaced, please contact the vehicle manufacturer, alternatively you can bend the end of the wiper where it attaches to the wiper arm to apply more pressure
Once you’ve got that sorted, pair it with a fresh pair of blades;