What Causes Car Noises on Rainy Days?

[StAshley]

Car noises on rainy days occur because the contact surfaces between the belt and pulley become smoother due to wear. Below are specific details about pulleys: Introduction: Pulleys are disc-hub type components, relatively large in size, and are generally manufactured through casting or forging processes. Applications: Pulleys are primarily used for long-distance power transmission, including power output for small diesel engines, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, textile machinery, packaging machinery, lathes, forging machines, power transmission for small horsepower motorcycles, agricultural machinery power transmission, air compressors, reducers, speed reducers, generators, cotton gins, and more.

[HeidiLee]

I think the unusual noises in a car on rainy days are usually caused by rainwater making originally dry or rusty parts start to rub against each other. For example, when there is rust on the brake discs, soaking in rainwater can cause sharp sounds when braking, which is quite common in older cars. If the rubber joints or pivot points in the suspension system lack lubrication, they may creak more noticeably when humidity increases, making the whole car feel shaky. Additionally, if the door or sunroof seals have aged and started leaking, the sound of raindrops hitting them becomes more pronounced. I've encountered this situation several times, especially after starting the car following prolonged parking during the rainy season. I recommend first checking these easily manageable areas, such as cleaning the wheel hubs or applying lubricant. If the issue persists, it's best to visit a professional repair shop to identify the source of the noise to prevent minor problems from turning into major faults.

[JessicaMarie]

Last month while driving in the rain, my car suddenly made annoying creaking noises, as if something had been soaked and damaged by the rainwater. I was quite nervous at the time, but later a friend helped me check and found that water had accumulated and caused rust on the brake calipers, creating friction noises when braking. After a few days of dry weather, the strange noises gradually disappeared. I also heard that heavy rain can easily cause poor tire drainage, leading to extra noise, or that untreated chassis rust can accumulate over time and become noisier. Anyway, rain seems to bring out all sorts of minor issues, but regular maintenance can help avoid them. Next time I encounter a similar situation, I’ll start by checking simpler parts like the brake pads and door seams to try fixing it myself, so I don’t waste money unnecessarily.

[VonAnderson]

Brief analysis of possible causes for car noises in rainy days: Rainwater accelerates metal part rusting, increasing friction, such as at brake discs or suspension arm locations. Poorly sealed components allowing water ingress can amplify abnormal sounds, while water accumulation in tire grooves may produce gurgling noises. Additionally, water pooling in the chassis or dampness in electrical systems might trigger squeaking sounds. I recommend first identifying whether the noise originates from the front or wheel areas. If the sound persists, it's advisable to inspect and replace vulnerable components. Always prioritize safety to prevent compromised braking performance.