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Going nuts with brake noise

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Old Apr 22, 2005 | 06:02 PM
  #1  
nv1271's Avatar
nv1271
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Default Going nuts with brake noise

Hello:

I have been going nuts with a noise like a caliper is dragging. When the car goes straight there is cyclical (hrss...hrss...hrss) a noise from the left side. The noise becomes continous when the car turns right and the left side of the suspension is compressed. It is not a strong noise and the brakes don't get hot. When that noise occurs, if I apply the brakes lightly it goes away for as long as the brakes are applied. Comes back when I let go. I have done the following:

1. New pads
2. New rotors
3. Rebuilt the calipers (new dust shields and o-rings, pistons were fine)
4. New wheel bearings

No improvement. What is going on?? Has anybody experienced the same problem and having a solution or suggestion?

Thanks
Nick
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Old Apr 22, 2005 | 09:41 PM
  #2  
1999Porsche911's Avatar
1999Porsche911
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Check the emergency brake shoe in the left back wheel. First see if there is a noise change when lightly applying the emergency brake when the noise occurs.
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Old Apr 22, 2005 | 09:42 PM
  #3  
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From: SF bay area, CA
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Originally Posted by nv1271
Hello:

I have been going nuts with a noise like a caliper is dragging. When the car goes straight there is cyclical (hrss...hrss...hrss) a noise from the left side. The noise becomes continous when the car turns right and the left side of the suspension is compressed. It is not a strong noise and the brakes don't get hot. When that noise occurs, if I apply the brakes lightly it goes away for as long as the brakes are applied. Comes back when I let go. I have done the following:

1. New pads
2. New rotors
3. Rebuilt the calipers (new dust shields and o-rings, pistons were fine)
4. New wheel bearings

No improvement. What is going on?? Has anybody experienced the same problem and having a solution or suggestion?

Thanks
Nick
not sure if this will help but check the metal deflector plate. if it somehow it became bent/deformed it can drag on the rotor.
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Old Apr 25, 2005 | 12:18 PM
  #4  
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nv1271
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Tried the parking brake and is not the problem. The deflector plate crlears the rotor easily. I am starting to think that maybe it is the brake booster or the master cylinder??
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Old Apr 26, 2005 | 01:04 AM
  #5  
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Joined: Dec 2002
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From: Chicago
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Originally Posted by nv1271
Hello:

I have been going nuts with a noise like a caliper is dragging. When the car goes straight there is cyclical (hrss...hrss...hrss) a noise from the left side. The noise becomes continous when the car turns right and the left side of the suspension is compressed. It is not a strong noise and the brakes don't get hot. When that noise occurs, if I apply the brakes lightly it goes away for as long as the brakes are applied. Comes back when I let go. I have done the following:

1. New pads
2. New rotors
3. Rebuilt the calipers (new dust shields and o-rings, pistons were fine)
4. New wheel bearings

No improvement. What is going on?? Has anybody experienced the same problem and having a solution or suggestion?

Thanks
Nick
Did you check the caliper pins? You might need new ones.
Reply




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