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Nairaland Forum / Nairaland / General / Autos / When The Brake Shakes On Freeway But Not On Street Road (299 Views)
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When The Brake Shakes On Freeway But Not On Street Road by tobechi20(m): 8:48pm On Mar 15, 2019 |
The first thing I noticed was that the right and left front brake rotors had a blue tint. The left front pads seemed to be equal to each other, but the right side was not. I then pulled off the wheels and calipers to check the pads up close, where I discovered that the right side was wearing very unevenly. The inner pad width was down to 1 mm and the outer pad was at approximately 2.5 mm, which suggests that the brake pads are getting jammed or stuck. I also noticed that the caliper carriers were rusted. The caliper carriers are where the brake pads sit. Upon further investigation, I found that each pad was wearing unevenly (high on one side and low on the other). The pads were not floating and instead were getting stuck in the carrier and preventing the brake pads from properly addressing the rotor surface. This started to cause abnormal heat buildup in the brake pads and rotors. When the brake rotors overheat, they lose their shape and thus cause the pulsation. The reason my customer was only noticing the shaking on the freeway is that city driving does not get the rotors hot enough to cause the distortion. The blue coloring I mentioned earlier was caused by the constant overheating of the brake rotors. After diagnosing the car, all I had to do was change the front brake pads and rotors and the pulsating went away. My customer can now drive happily on the freeway without worrying his brakes could go out. Problem solved. Matt Pataky https://www.losaltosonline.com/special-sections2/sections/on-the-road/47438-matt-solves-the-mysterious-case-of-the-professor-s-brake-shake |
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