Why Does the Brake Pad Smell Burnt During Continuous Downhill Driving?

[VonEvangeline]

Here is the relevant introduction to why the brake pad smells burnt during continuous downhill driving: 1. High Resistance: Because the brake pad is subjected to greater resistance than usual during downhill driving, it is prone to damage, carbonization, and significant wear. When the brake pad ages, it can easily wear out the carbon lining completely, leaving only metal-to-metal friction. It's important to note that metal-to-metal friction is minimal, which can lead to slipping and brake failure. 2. Vaporization Phenomenon: Additionally, high temperatures can cause the brake fluid to vaporize, which is intended to expel air from the brake lines. During brake adjustment, bleeding the brake lines to remove air is also a crucial step. Another reason is that prolonged downhill braking causes the brake pad temperature to rise rapidly, leading to high-temperature deformation and reduced contact area, which can also result in brake failure.