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Old 03-22-2016, 04:33 PM   #1
JGriff
 
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Rear Brake Grinding

I was having an issue with the driver's side rear caliper making a real bad grinding noise. When I took out the pads, I found out that one of the vibration dampers had stuck to one of the pads.

I got the pads out...and ultimately put in new pads and dampers. But the noise is still there! The rotor is scored quite badly...could that be the problem? Should I replace the rotor? Take a look:

Thanks!

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Old 03-22-2016, 05:04 PM   #2
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No, its just fine. Rotors are not supposed to be smooth on the surface


Uh YES!! You need to replace the rotor.

That looks like it was grinding for more than a few miles. How long have they been grinding
I'll bet the pad was down to the metal backing plate.

I hope you replaced all the pads on that axle, not just the one wheel

You may need to replace the pads again as they will be worn to match the scored rotor

Look on ebay for Meyle rotors and you can find them for $75-$85 a pair. I would replace both of them and check the other axle to see if it has the "lip" on the edge like your rears look like they have. The rotors have only a 2mm wear from new to worn out

The dampers will be stuck to the pad, use a small putty knife to separate it from the pad and you can reuse them if you are even slightly careful.

If your brake fluid has not been changed in the last 2 years, you need to do a flush, replace, and bleed
at very least, bleed the brakes


BTW, it's always nice to introduce yourself on your first post
And without pics, it ain't real
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Last edited by JayG; 03-22-2016 at 05:10 PM.
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Old 03-23-2016, 01:53 AM   #3
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I'd never put new pads onto a disc that bad. It'll ruin the pads. And then when you replace the disc, the ruined pads will ruin the new disc. And so on.
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Old 03-23-2016, 03:27 AM   #4
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Did you measure the thickness of the rotor? On the photo it looks like it is below the limit.

If the thickness is OK and you have some mm left you can bring the car or the rotor to a shop that is able to lathe machining it.

Regards, Markus
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