Why does the car make abnormal noises when starting after rain?

[Lawson]

After rain, fine sand carried by water adheres to the brake discs, and the rust formed on the brake discs is equivalent to tiny particles. If there are tiny particles between the hard brake pads and the gray cast iron brake discs, there will be sharp noises. Stepping on the brakes a few times to grind off the small particles will solve the problem. Here is an introduction to related content: 1. Traffic accidents: Rainy days are high-incidence weather for traffic accidents because the driver's visibility decreases in the rain, the friction between the tires and the ground is reduced, and the gloomy weather brings depression to people, making traffic accidents more likely to occur. 2. Preventing tire side-slip: On rainy days, the ground is wet, and the friction of rubber products like tires is greatly reduced when they get wet, which can easily cause tire side-slip. Therefore, when turning, you should not brake suddenly. It is best to slow down in a straight line before entering the curve.

[VonRhett]

Yesterday, my car made a squeaking noise when starting after the rain, which really worried me. Generally, this happens because the brake discs get wet and rust after rain, causing friction noise when braking, but it usually goes away after driving for a while. However, if it's due to loose suspension components or water-deformed rubber bushings, the noise might persist. It's best to check the brake pads and chassis as soon as possible, especially for older cars which are more prone to this issue. Don’t forget to add some lubricant to the moving joints during rainy season maintenance—don’t wait until the noise gets worse to address it.

[AubreeFitz]

It's quite common to hear strange noises when starting after rain, mostly due to rainwater causing rust on the brake discs or dust stuck in the brake pads, leading to temporary friction sounds. My off-road vehicle often does this, and the noise disappears after driving for a while. If the noise persists or becomes sharp, it might be due to belt aging and slipping or drive shaft wear, so it's best to check the bearings at a car shop. Regularly clearing accumulated water under the wiper groove when idle can help reduce this issue.

[LeKiara]

Hearing strange noises when starting the car after rain is my biggest safety concern. The sounds mostly come from rainwater causing rust on the brake discs or aging suspension rubber boots swelling due to water ingress. If not repaired promptly, the car's performance will decline, posing safety risks during turns. It's recommended to check if the chassis screws are loose before rainy days.