What Causes the Squealing Noise from Brake Discs That Disappears After Driving for a While?
3 Answers
This is due to worn brake pads. When this occurs, new brake pads should be replaced. Brake pads are consumable parts in the braking system that require regular replacement. As the vehicle's mileage increases, the brake pads will continuously wear down and need replacement after reaching a certain level. Below is an introduction to the related content: Introduction: The braking system is a crucial system in a vehicle, directly related to the driving stability and safety. Main Components: The main components of the braking system include the vacuum booster pump, master cylinder, slave cylinder, brake pads, and brake discs. The vacuum booster pump provides assistance, making it easier for the driver to press the brake pedal. When the brake pedal is pressed, the master cylinder pushes the slave cylinder via brake fluid. At this point, the slave cylinder can push the brake pads to clamp the brake disc, slowing the vehicle down. The brake disc is also a wear item that requires regular replacement. As the vehicle's mileage increases, the brake disc will continuously wear down and need replacement after reaching a certain level. Precautions: The brake fluid in the braking system also needs regular replacement. Brake fluid is a liquid that easily absorbs moisture. If the brake fluid's moisture content is too high, it can lead to reduced braking force and longer braking distances. Therefore, it is essential to regularly replace the brake fluid during vehicle use. When the brake fluid's moisture content reaches 3%, it must be replaced immediately.
As a young person who drives an economy car to work, I've experienced situations where the brake discs squeak for a while before stopping. This is usually caused by water or dew on the brake discs, such as after rain or on humid mornings. The initial braking causes the pads and discs to rub and produce a squeal, which disappears after a few minutes of driving as the moisture evaporates. Sometimes, small stones get stuck in the gaps and the noise stops once they're ground away. I remind myself not to take it lightly, as prolonged occurrences could indicate severe brake pad wear, requiring new pads or a check for lodged debris. During my last maintenance, the mechanic mentioned that normal handling costs aren't high, and prevention is safer. If it happens frequently, it's best to make time for a garage visit to avoid disrupting daily commutes. Safe driving is key, and maintaining the brake system can save both hassle and money.
As a family driver with twenty years of experience, I believe brake squealing is common during short-distance driving. It tends to be piercingly loud at startup but quiets down as the brakes heat up, primarily due to rust or dust and debris on the disc surfaces. The issue becomes more noticeable after rain when humidity is high—abnormal noise is louder during the initial friction phase but fades as the wheels rotate and heat up, restoring normal friction coefficients. However, ignoring this phenomenon may lead to reduced braking efficiency. For maintenance, I make it a habit to inspect the cleanliness and proper thickness of brake components monthly. Ensuring proper alignment and no looseness costs little but effectively prevents additional wear, extends overall lifespan, and is highly worthwhile for safety.
