Brake rotor hot with rumbling sound

[Yuzhou]

Hi,

I have 2012 Hyundai Santa Fe, FWD. In the past month, there have been a few instances where I’m driving 60 km/h to 100 km/h and all the sudden there is a loud rumbling and shaking coming from the right rear. After stopping I can feel the rear right brake rotor is scorching hot, while the other 3 rotors are warm or cool. Then when I start to drive again, the rumbling sound and shaking is gone.

I figured I had seized brakes, so I took off all 4 wheels, lubricated the caliper slide pins and put anti-seize on the brake pad ears as shown in ETCG video here: https://www.youtube.com/watch?v=cKpmBvfVYZg
With the wheel off, inspecting the rear right I didn’t see anything obvious. When turning the rotor by hand, the resistance on the rear right was the same as the rear left. With the rotor off, the wheel hub/bearing spun fine I think.

Ok, so I thought I fixed it (yesterday). But after driving today, the same rear right rotor was hot again while the other 3 cool. No rumbling or shaking this time.

Any ideas on what could cause the issue?

Topic

[Todd Smith]

I had the same thing happen on my Lexus. Turns out the piston in the caliper was beginning to seize internally.

[Author]

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