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brake problem

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Old May 9, 2010 | 03:59 PM
  #1  
Joseph Thompson's Avatar
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The White Mule
 
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From: Goss, Mississippi
Default brake problem

the ole 87 has a brake problem... its like their catchin. similar to bumpin the brakes on and off but they get really hot.. any idea??
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Old May 9, 2010 | 05:23 PM
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Front or rear???
Disc or drum???
have you bled them recently??? (good place to start, along with a full flush of fluid)
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Old May 9, 2010 | 05:49 PM
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clean and lube the sliders that the calipers are held in/ slide on. and then bleed the brakes, if it still persists you may have an issue with your calipers.
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Old May 10, 2010 | 12:23 PM
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I would check master cylinder also, but start with caliper slides, calipers, and fluid.
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Old May 10, 2010 | 02:37 PM
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Joseph Thompson's Avatar
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yeah its just the front disc brakes but they feel really spongy and go almost to the floor befor they start holding... i guess i should just completely bleed them off clean them up and start over... wont that work?hopefully...
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Old May 10, 2010 | 11:42 PM
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Hey Joseph,

I’m Jason from drilledandslotted.com. When you say “its like their catchin. similar to bumpin the brakes on and off. I assume that to mean when you hold the pedal pressure constant. If you feel pulsing in the pedal or steering wheel, you most likely have a warped rotor(s). I have seen as little as .010 cause a noticeable flutter in the brake pedal. As others have said, you may also have sticky slide pins that can cause the caliper to drag and generate tremendous heat.
With regards to the spongy pedal, there are several possibilities.
  • Air in system
  • Moisture contaminated fluid, remember brake fluid is hydroscopic, its absorbs moisture over time, causing a spongy pedal and has a much lower boiling point that results in brake fade.
  • Old rubber brake lines blow up like a balloon animal when you step on the pedal.

I would check the rotors for flatness/parallelism. Turn or replace them as necessary.
Completely drain and flush the system with new, high temp fluid.
Clean, inspect and lube the caliper pins and bushings
If you have the money, braided stainless lines are worth the money (to me)

Hope that help

Jason

Feel free to email me at info@drilledandslotted.com
www.drilledandslotted.com
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Old May 11, 2010 | 09:52 AM
  #7  
Joseph Thompson's Avatar
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Thanks man. big help
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