What Causes Car Brake Pads to Squeak on Rainy Days?
1 Answers
When the car brakes squeak, the following are the reasons why it worsens on rainy days: 1. Fine sand adheres to the brake disc: Rainwater carries fine sand that sticks to the brake disc. In humid weather or when there is a large temperature difference between day and night, dew or rain can cause the brake disc to rust, which acts like tiny particles. Car brake pads come in hard and soft varieties. Hard pads are more wear-resistant, but if there are tiny particles between the hard pads and the gray cast iron brake disc, they can produce a sharp squeaking sound. A few brake applications will wear off these small particles and the noise will stop. 2. Break-in period: The break-in of a new car includes an important phase for the brake pads. Typically, after driving a few hundred kilometers, the braking will feel more comfortable. Newly replaced brake pads also need a break-in period to better integrate with the old disc. Initially, the brakes may feel very stiff, and it usually takes a few hundred kilometers of driving before they feel better. 3. Missing brake disc fixing screws: Missing or damaged fixing screws on the brake disc can also cause brake noise.