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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Wed, Aug-01-2012, 02:08:18 AM   #1
sharde26
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Question Continuing Brake Trouble

Hi all,

I wouldn't ask if I wasn't at a loss. My front driver's side brake caliper keeps on dragging. I have replaced the caliper....twice, and replaced the hydraulic line. As far as I know I have only the metal line and the brake master cylinder left to replace. Can anyone give me a heading as to which it might be?

The strangeness of the thing is that whenever I bleed the brakes, I have no trouble for months. It is almost like air is seeping into the lines over time. Only on the front driver's side though.

Any thoughts?
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Old Wed, Aug-01-2012, 02:13:19 AM   #2
aeronaut
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Default Re: Continuing Brake Trouble

Interesting. How do you know it's dragging?
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Old Wed, Aug-01-2012, 02:18:38 AM   #3
sharde26
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Default Re: Continuing Brake Trouble

Another note, it only seems to start happening after driving for awhile above 60 mph. At that point the steering wheel start shaking and the car starts pulling slightly to the left. Also the heat coming from that wheel afterwards is a dead giveaway. The caliper is very hot to the touch.
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Old Wed, Aug-01-2012, 02:22:47 AM   #4
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Default Re: Continuing Brake Trouble

Well, I'm at a loss. I'm sure others will have ideas. Have you checked rotor runout?
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Old Wed, Aug-01-2012, 02:25:49 AM   #5
sharde26
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Default Re: Continuing Brake Trouble

I have not. I'm inclined to think that a warped rotor isn't the problem though. This all started last year when my caliper seized up.
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Old Wed, Aug-01-2012, 02:35:17 AM   #6
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Default Re: Continuing Brake Trouble

I wouldn't think so either, but was just thinking of easy things to rule out.
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Old Wed, Aug-01-2012, 02:38:22 AM   #7
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Default Re: Continuing Brake Trouble

Makes sense. I work in IT and my first question is always "Is it plugged in?"
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Old Wed, Aug-01-2012, 05:09:36 AM   #8
enderw88
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Default Re: Continuing Brake Trouble

Quote:
Originally Posted by sharde26 View Post
I have not. I'm inclined to think that a warped rotor isn't the problem though. This all started last year when my caliper seized up.
Warped rotor totally makes sense given your last sentence. Check the rotor runout.
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Buying the car is going to turn out the be the least expensive part of this experience. Fun though.
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Old Wed, Aug-01-2012, 05:19:27 AM   #9
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Default Re: Continuing Brake Trouble

Hmmm, I don't have the required dial to check the runout so I'll try swapping the passenger and driver's side rotors to see if the problem follows the part. Sound good?
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Old Wed, Aug-01-2012, 01:59:30 PM   #10
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Default Re: Continuing Brake Trouble

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Originally Posted by sharde26 View Post
Hmmm, I don't have the required dial to check the runout so I'll try swapping the passenger and driver's side rotors to see if the problem follows the part. Sound good?
Or you could go to harbor freight and buy this dial indicator for $35.


And not pose a safety risk to yourself and everyone around you. This should really be a required tool if you change your own pads.
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Discussing Continuing Brake Trouble in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)