Grinding Noise

[CO996C4]

Anyone have a past problem with a grinding/scraping noise from front hub area?

I was driving my 01 C4 today and on last turn to house I started hearing this noise. I pumped the brakes and then tried going in reverse and applying brakes but noise is still there.

I took RF wheel off, spun disc and grinding was still there. Could it be a dragging brake? Noise seems to come more from the dust shield than the disc itself.

Jim

[Loren]

Could be a rock or pebble caught in the splash shield. That is fairly common.

[CO996C4]

Loren I hope it is just a rock. How does it sense when disc thickness is getting to narrow? I knowit has a pad wear sensor. I know some car makes make a noise type alert system when brakes wearing down. I can measure disc thickness if that helps.

Jim

[JimB]

Jim

If it's not a small rock, try pushing the heat/splash shield back a little bit. For some reason they seem to deform just enough that they will rub on the rotor. You can just push back a little on the corners that protrude.

As for the rotors, mine have always cracked before they got even close to being too thin but my car is only used on the track. I'm sure Loren will be back to you with the measurement. I'm pretty certain that rotor thickness has nothing to do with your noise though.

Good luck,

Jim

[CO996C4]

:P Thanks I will try pushing on them. If not, I will have to have dealer take it apart.. I do not have the huge socket needed to take the disc hub off. BTW the thickness came in at about 27.8mm.

Jim :cheers:

[Loren]

New front brake thickness is ~28 mm.

To remove the rotor you take off the caliper. Then remove the 2 phillips head screws holding the rotor on. See my DIY brake pad section for more detail.

[CO996C4]

Cool, but your original assessment must have been right..I went out and drove it hard and within 2 miles the noise stopped.

Thanks again

Jim D