What Causes Abnormal Noises When Starting the Car After Rain?

[VanCarlos]

After rain, fine sand carried by water adheres to the brake discs, which then rust, creating tiny particles that cause abnormal noises in the car. Below are specific details about driving in rainy conditions: Traffic Accidents: Rainy weather is a high-risk time for traffic accidents because visibility decreases for drivers, and the friction between tires and the road surface is reduced, compromising driving safety. Preventing Tire Skidding: Wet roads during rain significantly reduce the friction of rubber tires, making them prone to skidding. Therefore, avoid sudden braking when turning; instead, decelerate in a straight line before entering the curve.

[DeLena]

When I encounter abnormal noises after starting the car in the rain, I find that common causes include rusted brake pads. Rainwater causes metal parts to oxidize, and the friction during startup produces a scraping sound. Additionally, accumulated water in the chassis can lead to rusted and loose suspension components, resulting in a clicking noise. Sometimes, a wet drive belt on the transmission shaft may slip, causing a squeaking sound. It is recommended to lightly press the brakes a few times before driving after rain to help remove rust. If the noise persists, promptly check to prevent brake failure. Parking in low-lying areas with accumulated water should be avoided in daily use to reduce such issues. During rainy season maintenance, strengthening the anti-rust coating on the chassis is advised. The maintenance cost is not high but significantly reduces driving risks.

[LeCameron]

After driving off in the rain that time, I suddenly heard a tapping sound and quickly pulled over. A friend suggested it might be due to water entering the suspension or shock absorbers, causing the rubber sleeves to swell and rust, leading to abnormal vibrations. Sometimes, a loose or contracting exhaust pipe joint can also produce noises. A simple solution is to drive slowly for a few hundred meters after starting, allowing the parts to dry and recover. For long-term prevention, regularly check the chassis's sealing and use waterproof sprays on critical areas during the rainy season. These noises don't immediately affect driving, but delaying repairs can increase damage costs. Parking on flat, dry surfaces can effectively prevent startup noises.

[EllieMarie]

After rain, there's an abnormal noise, and I always suspect the brake pads are rusted. Rainwater causes metal to oxidize, resulting in a squeaking sound during friction, which disappears after driving for a while. Another possibility is belt slippage, where poor lubrication from rainwater causes a screeching noise. If you want to handle it yourself, check the belt tension in the engine compartment after rain by manually pulling to see if it's loose. Water accumulation in chassis components like stabilizer bar joints can also cause rust-related noises. Simple maintenance: dry sensitive areas with a cloth or apply some anti-rust oil. Regularly drying your car after washing can prevent such issues. Temporary noises are common, but persistent ones require professional help.