What Causes Brake Noise After Long-Term Parking?
2 Answers
Here are the specific reasons for brake noise after long-term parking: 1. Improper brake pad installation: When installing new brake pads, the old brake disc was not resurfaced, resulting in poor fit. Poor fit or installing new pads without resurfacing the old disc will cause the new pads to rub directly against the uneven surface of the old disc, eventually leading to uneven wear of the new brake pads. 2. Brake system malfunction: There may be defects in the brake system itself, causing the brake pads to only partially contact the brake disc. This increases the pressure per unit area on the brakes, resulting in noise. It is recommended to check components such as the caliper and guide pins. 3. Presence of foreign objects: Foreign objects cause poor contact surface fit, leading to noise.
I've encountered a similar situation where my car sat unused for a week, and the brakes squealed loudly upon startup. This is usually caused by rust on the brake discs. High humidity or prolonged parking during rainy weather can easily lead to rust formation on the disc surfaces. The noise occurs when the brake pads rub against the rust during startup, similar to rust scraping on sandpaper. Don't worry—it typically disappears after gently applying the brakes a few times. However, if the noise persists, check for brake pad wear or potential hard spot issues. I recommend moving the car periodically or parking in a garage to avoid moisture. I've noticed this happens more frequently during seasonal changes, especially in damp spring weather. Regular cleaning of wheel dust also helps ensure safe driving.
