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Suspension & Braking Forum by BimmerWorld
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Old 11-03-2008, 08:14 AM   #1
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Join Date: Mar 2004
Location: New Jersey
Posts: 226
My Ride: 323ci
Brake Question

Hi All,

Just re-did my front rotors/pads because i felt some vibration when i braked. Thought it could have been a warped rotor. After the install I tested my work and the shimmy, or "vibration" was gone. However it seems to be coming back. I did not do the rears yet; they don't seem to need it.

The question is, why would this vibration happen? Also, i need to apply more pressure than usual to stop. Not anything major, but more than i'm used to. I did not bleed the brakes, could it be I have some air in the lines? I compressed the pistons with a c-clamp when i installed the pads...

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Old 11-03-2008, 08:51 AM   #2
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Join Date: Sep 2008
Location: Croatia, Zagreb
Posts: 12
My Ride: '02 330Ci
if you redid rotors/pads they need time to bed in order to get that initial bite IMO.

i think air in the lines would be obvious if you can "pump up" the brake pedal. also, you wouldnt have to apply more pressure, just more pedal travel, which would shorten after pumping.

if you require more pressure to get same brake force that means the pads arent biting the rotor as much as they did before
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