YACT: what causes brakes to grab?

Discussion in 'Off Topic' started by NeoPTLD, Jan 10, 2005.

  1. NeoPTLD

    NeoPTLD Platinum Member

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    My brakes have issues with grabbing for the first few miles after I let it sit for a few days. I bring the car to a gentle stop at low speed and the brake just grabs hard when I'm almost completely stopped.

    One of my front tires skidded today right before I came to a complete stop because it grabbed suddenly. Grabbing always goes away after driving it for a bit. What is happening at the rotor/pads when it grabs like this?
     
  2. Confused

    Confused Elite Member

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    What car is it? It might help if you tell people in case they know of a problem with your particular car :roll:
     
  3. TechnoKid

    TechnoKid Diamond Member

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    do you have 4 wheel discs or drums in the rear?

    i was going to say slight rust from brake dust and moisture on the rotors sometimes takes a stop or two two come off. this happens when the car is parked otuside and it rains and it isn't driven for a while.

    does the pedal feel normal when this happens?
     
  4. Pepsi90919

    Pepsi90919 Banned

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    moisture causes rust.

    end of thread.
     
  5. raptor13

    raptor13 Golden Member

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    Fixed.
     
  6. 0roo0roo

    0roo0roo No Lifer

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    rust over and over?
     
  7. olds

    olds Elite Member

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    End yourself. Please.
     
  8. hans007

    hans007 Lifer

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    i think it depends on how the calipers are turned. at least thast what i've read.
     
  9. NikPreviousAcct

    NikPreviousAcct No Lifer

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    Right because brakes are different for each year, make, and model for each car out there. :roll:
     
  10. Insane3D

    Insane3D Elite Member

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    Read the last part of the sentence slower Nik...

    As in...model specific brake problem.
     
  11. Pepsi90919

    Pepsi90919 Banned

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    oxidation is rust :confused:
     
  12. NeoPTLD

    NeoPTLD Platinum Member

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    Read my question carefully.
    What is happening at the rotor/pads when it grabs?. No where did I ask whether or not this particluar model has this and that problem. I'm interseted in the phenomena at the component level.
     
  13. NikPreviousAcct

    NikPreviousAcct No Lifer

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    See, I knew this... because I didn't have a reading comprehension problem.
     
  14. Stumps

    Stumps Diamond Member

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    your problem will be related to the moisture in your brake fluid, what happens is your flexible brake lines allow the brake fluid to absorb water, now under normal operating circumstances this is ok and will not really affect your braking performance.
    but if you have let you car sit for a while what happens is the water seperates from the fluid and is like water in oil, as soon as you apply the brake it heats up the fluid and the water which will cause the water boil, this displaces the brake fluid momentarely as the car slows and then as it is reabsorbed by the brake fluid the comes rushing back and force the caliper to close with more force than the intial application and it lock the wheel.
    Sounds like you may need a fluid change!
     
  15. Insane3D

    Insane3D Elite Member

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    Actually, the way you worded it, you sounded like you were having brake problems and wanted help figuring it out, not the specifics of why it does that.

    "My brakes have issues" sounds like a problem.

    Sorry I misunderstood you...I was speaking more toward Nik's post than your OP.

    :)
     
  16. Insane3D

    Insane3D Elite Member

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    After thinking about that post for a bit, I realized I was probably just being pissy myself because I'm tired and I worked all last night.

    You can see my original post in Eli's quote.

    Sorry Nik...you bug me sometimes, but you really didn't do anything to warrant that now that I look back on it.

    Eli's right....it's stupid to get upset over this sorta stuff.

    :)
     
  17. Stumps

    Stumps Diamond Member

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  18. quakefiend420

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    bwahahaha...i love this place...
     
  19. Stumps

    Stumps Diamond Member

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    hmmm not much has changed since i was banned from the forums over 2yrs ago!
     
  20. Insane3D

    Insane3D Elite Member

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    Welcome back!

    [​IMG]
     
  21. Stumps

    Stumps Diamond Member

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    one question, does neffing still exist?
     
  22. quakefiend420

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    lol...like that would die :D

     
  23. Insane3D

    Insane3D Elite Member

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    No, neffing was eliminated in early 2002.

    Edit:

    Sorry OP, I'll let this thread get back on topic.
     
  24. Stumps

    Stumps Diamond Member

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    hmmm, about the time I got banned, hmmm maybe I had something to do with it.
    Any way as far as the brake issue goes, thats his problem...water in the brake fluid.
     
  25. Eli

    Eli Super Moderator<br>Elite Member
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    /blows smoke towards Nik and Insane3D

    Chill, it's brakes.

    :p