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Unread 04-01-2015, 02:11 PM   #1
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Default rotor hot spots and brake pad replacement

Hello,
I bought a used kia soul from the lexus valencia dealership with 36k miles on september 30th. I noticed loud squeeking noise from my brakes 2 weeks later so I took the car back to the lexus dealership on october 18th. They said that the brakes had glaziing and needed to be resurfaced. so they turned the routers and said the car should be good at no charge. Now 5 months(2500 miles) later I heard the same loud squeeking from my brakes and decided to take the car to the Kia of valencia dealership which happens to be owned by lexus of valencia(where i bought the car) and Kia told me that I need front and rear brake pads and the routers now have hot spots which will require the router to be resurfaced again to remove the hot spots. They also mentioned that the brake pads should have been replaced to begin with before when the glazing was found on the routers even though at this moment 7mm(70%) of pad life is there.
So I ended up taking the car back to lexus without doing the recommended repair by Kia because to me this is a connected issue to when I first had problems with the routers. Lexus is now pretty much placing the blame on me saying that I could have caused the hot spots by braking too hard when I drive too fast or riding my brakes which is a lie because I dont drive like that. They also started saying that their lexus techs are better than the kia techs and would like the lexus techs to take a look at it instead so the sales manager can speak to the general manager to see if they would help us out.
To my knowledge if glazing is occuring there is something wrong with the calibration, possibly after market pads, resurfacing and turning the routers caused to router to be thinner which caused the hot spots due to the router heating up more than it could take since there was not enough heat distribution, or taking the advice of the Kia dealership, the pads should have been replaced from the start.
What is the proper way to fix this issue? Should I ask for the pads to be replaced and routers to be turned like Kia recommends or is there another issue? Would getting new routers instead of pads be a better idea since there is 7mm left? How can I prove these lexus [email protected] wrong?
Thank you so much in advance,
Soulwoman

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Unread 04-02-2015, 12:54 AM   #2
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Glazing can happen with or without hot spots.

Glazing can happen with cheap brake pads, or if the brake pads are dragging, or with friction surface contamination.

Hot spots happen with hard braking. If the brake rotors cannot dissipate heat quick enough they can warp or develop hot spots, or both. The hot spots are areas of the friction surface that have been hardened by the heat. Once this has happened you must discard the brake rotors. Machining cannot remove the hot spots as they go too deep.

Rotors that cannot dissipate heat quick enough may be cheaply manufactured, or they may be heavily rusted in the venting area preventing heat dissipation. They may also be inadequate in design and prone to overheating easily.

Machining brake rotors reduces their mass and they are more prone to overheating. This combined with a marginal system to begin with, and it doesn't take much to overheat the brake rotors. Just one hard haul down on the freeway when traffic suddenly slows down will do it.

It's hard to pin point where or what is responsible. Kia will not admit that the brakes on this car are marginal. They will of course blame the driver.

I would have to see the brake rotors and pads to examine them and try to determine the brand. If they are not OEM, brakes or quality aftermarket brakes, only the driver is left to blame. Remember, just one hard use of brakes is enough to do this to even the best brakes you could have on this car.

Sorry I can't tell you what you want to hear.
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