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Can You Cool Overheated Brake Discs with Water?

1 Answers

DeCamille

07/30/25 3:40am

You should not cool overheated brake discs with water. The daily maintenance of brake discs is as follows: 1. Protect brake discs when washing the car: Before washing your car, it is recommended to let the car cool down naturally before proceeding with washing and maintenance. During daily braking, the brake discs generate a large amount of heat due to friction, resulting in high temperatures. If you wash the car at this time, the cold water sprayed on the hot brake discs can cause thermal contraction, leading to warping or deformation of the steel brake discs, and in severe cases, cracks may appear. 2. Minimize brake disc wear: Although brake discs wear out slower than brake pads, and most mechanics only recommend replacing brake pads and brake fluid, brake discs will eventually wear out after a certain mileage. Uneven surfaces or insufficient thickness of the brake discs can significantly impair braking performance over time. 3. Avoid brake noise: Performance-grade brake pads are designed for prolonged high-temperature use, and "hissing" sounds are normal due to different material compositions and usage conditions. However, if such noises occur in regular passenger vehicles, it should be taken seriously. Drivers should regularly clean the brake pads and discs to prevent foreign objects from entering the braking system and replace them with qualified brake pads.

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