LEH82

needed resurfacing. the new pbr ceramics are squealing awfully loud when reaching to a stop from about 15mph-0. I've tried semi-metallics of various brands and these are my first set of ceramics (from recs about them being quieter...lol) next pads i'll try are hawk hps or yellow stuff ebc to get rid of the squeal

<img src="http://pictureposter.audiworld.com/109130/ps_frnt_brake.jpg">
passenger front

<img src="http://pictureposter.audiworld.com/109130/ps_frnt_brake1.jpg">
passenger front

<img src="http://pictureposter.audiworld.com/109130/dr_frnt_brake.jpg">
driver front

BernieBenz

Your rotors are too new, not enough ridge yet. Don't ever, NEVER resurface rotors.

gphelps4.2

Why NEVER, EVER? Just did mine.

LEH82

is a noticeable ridge on the outside edges...do they look like they are glazed?

BernieBenz

1. Rotors tend to wear true. Yours are dead true independent of hub mating surface runouts, as long as you maintain the rotor to hub orientation for life. I center punch adjacent marks on hub and rotor for this purpose.
2. The raised annular rings make great 4 wheel, 8 surface passive pad wear sensors. The rings will be first to contact the pad's backing plate with a "can't miss" audible noise. The active sensors are just in the way, to be cut off.

Those rotors look beautiful!

BernieBenz

which translates 3 or 4x at the rotor OD. Why pay to have good rotors screwed up while throwing away good material? The system, brake lathes and minimum wear specs, IMO are designed to sell new rotors.

All Wheel Driver

Did you do a proper bedding in? That usually eliminates squeal.

S4_Cinci (I S'edTFA)

against the side of the new pads. This will go away with some more miles. I know the noise is irritating, but I had the same thing when I last put in new pads and it will disappear after a while. You can speed up the process by braking harder while coming to a stop instead of easing to a stop.

ThetaTau87

Do about 6 really hard stops from 60-10mph with at least a 1/2 mile inbetween w/o braking. After you do all 6 stops then drive for about 15 min w/o touching the brakes to let them cool gradually and evenly with lots of airflow.

You either need a deserted express way or a long seconday road with little to no traffic and no stop signs or traffic lights to do this procedure.

You can do this any time your brakes are making noise or pulsing like what many people incorrectly describe as warped rotors. The pulsing is caused bu uneven pad material build up on the rotor.

S4_Cinci (I S'edTFA)

the metal in the rotors absorb that heat. Resurfacing removes mass, which leaves less metal to absorb the heat, which can ultimately reduce stopping power.

Over time, the rotors transfer the heat to the air (and to the wheels and tires), but during a stop there is no time for the air to cool the rotors so all the energy goes into increasing the temp of the rotors.