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Scraping disk brakes

Discussion in 'General Automotive' started by Krazie Sj, Sep 21, 2010.

  1. Sep 21, 2010 at 1:14 PM
    #1
    Krazie Sj

    Krazie Sj [OP] Resident Jackass

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    So the wifes 2001 WG Rear drivers disk brake has a scraping sound like a rock stuck in the disk. It's only apparent at low speeds and doesn't seem to affect braking power.

    Any clue what in the happy fuck that could be?

    There's no squeaking from the brakes or pulling to any side.
     
  2. Sep 21, 2010 at 1:17 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Drain the tranny fluid, and dump it into the coolant...







    :p Take it to a car wash, and spray it out really good. It could be a rock stuck in it. If it doesnt go away, It may be the noise maker telling you it needs new [ads.
     
  3. Sep 21, 2010 at 1:31 PM
    #3
    Krazie Sj

    Krazie Sj [OP] Resident Jackass

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    Should I be using a pressure washer or just a good solid hose with a nozzle?
    And anyways, I'm not doing an oil change. If anything I'd remove the spare tire and mount it where the radio antenna is.
     
  4. Sep 21, 2010 at 1:32 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Yeah, A pressure washer is fine, but keep the nozzel about (sorry) aboot 6" away...not sure what that is in CM's or whatever shit you use to measure....
     
  5. Sep 21, 2010 at 1:41 PM
    #5
    HondaGM

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    hey,i did that........it made my waterpump start shifting:p
     
  6. Sep 21, 2010 at 1:44 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    GAH!!!
     
  7. Sep 21, 2010 at 8:36 PM
    #7
    2gtacoma

    2gtacoma Well-Known Member

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    to me sounds like the wear indicator is letting you know its getting low. Why dont you take off the rear tire and inspect it.
     
  8. Sep 21, 2010 at 8:54 PM
    #8
    larryde09

    larryde09 Well-Known Member

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    x2....sounds like worn out pads.
     
  9. Sep 21, 2010 at 11:20 PM
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    Janster

    Janster Old & Forgetful

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    What vehicle is this?

    Drive in reverse and put the brakes on, should dislodge any rocks/debris.
     
  10. Sep 21, 2010 at 11:29 PM
    #10
    BakoTruck

    BakoTruck Well-Known Member

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    I KNOW!

    Take it to a professional and have them take a look at it.
     
  11. Sep 22, 2010 at 12:12 AM
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    Krazie Sj

    Krazie Sj [OP] Resident Jackass

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    2001 Grand Cherokee.

    I'll get the wife to try the reverse thing tomorrow.

    I thought wear pads were supposed to squeak? Not sound like an iron dick rubbing up against the rusted leg of a giant...
     
  12. Sep 22, 2010 at 4:57 AM
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    larryde09

    larryde09 Well-Known Member

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    On older cars I've had some pads squeek and some make a grinding noise. Then I had one that I ignored the squeek for too long and it turned into grinding...oops!
     
  13. Sep 22, 2010 at 5:40 AM
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    Pugga

    Pugga Pasti-Dip Free Since 1983

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    This just happened on my girlfriend's car, the pads were shot. No squeek, just grinding metal on metal. I'd check sooner rather than later otherwise you'll put some nice digs in the rotors and will end up buying them also.
     
  14. Sep 22, 2010 at 5:48 AM
    #14
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    "Squealers", as they are called, do make the squeal sound. But if the pads are worn enough and the squealers are none existent, then it does sound like and iron dick rubbing up against the rusted leg of a giant.
     
  15. Sep 22, 2010 at 5:51 AM
    #15
    tigerfan00

    tigerfan00 BECAUSE INTERNETS!! Staff Member

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    do they look like this?

    [​IMG]
     
  16. Sep 22, 2010 at 5:54 AM
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    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Now that's impressive
     
  17. Sep 22, 2010 at 7:08 AM
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    Janster

    Janster Old & Forgetful

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    Oh dear god.... Grand Cherokee brakes SUCK major ass. We had a 99 and my mother-in-law currently has it. When we first bought that thing (used)- the first thing we replaced was the rotors & calipers on the front (TSB calipers). Not 3 years later, replaced the front rotors again. They warp soooo frigin easy. Then, after selling it to my mother-in-law.....had to change the rear rotors/calipers because they were all messed up (gouged/chewed up). It's been fine since, but she only drives it 3k miles a year. We're eventually gonna get rid of the damn thing!!!

    Did you inspect the rear rotors? They might be all gouged up and/or too thin.
    On ours....we didn't get any warning of the rears being gouged. The pads were fine and the last time we checked them (maybe 2 years), everything looked good. Seems sometime in that 2 years, those rear rotors went to shit (wearing thin). That's just my experiences...
     
  18. Sep 22, 2010 at 7:25 AM
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    65tacodude

    65tacodude Well-Known Member

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    Ive seen this in school buses before...and worse..
     
  19. Sep 23, 2010 at 9:05 AM
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    Krazie Sj

    Krazie Sj [OP] Resident Jackass

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    I'll have a look at that. I knew the pads were already warped because when braking it kinda pulsed (Not ABS style pulse, but fucked up rotor pulse).
    The thing that is concerning me now is that I took it for a drive yesterday with the window down and it makes a lighter sounding scraping sound when driving at low speeds. Sound goes away at around 20mph and oddly enough when turning right. And comes up again if you hit a bump.

    This is the weirdest vehicle I've ever seen...
     
  20. Sep 23, 2010 at 9:16 AM
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    Janster

    Janster Old & Forgetful

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    The sounds go away when you step on the brakes? So you know for sure it is the brakes?

    Have you visited the jeepsunlimited forum? There will be a shit-ton of information regarding the GC and its wonderful personality. :D
    The WJ section
    http://www.jeepsunlimited.com/forums/forumdisplay.php?f=21
     
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