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Brake Woes

Discussion in '2nd Gen. Tacomas (2005-2015)' started by jv_74, Apr 25, 2019.

  1. Apr 25, 2019 at 7:12 AM
    #1
    jv_74

    jv_74 [OP] Well-Known Member

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    About a year ago my truck started pulling hard to the driver side when braking. Figured my caliper went on the passenger side. Pulled everything apart and found my passenger side brake pads and rotor to be completely glazed over and smooth! There was still a ton of meat on them, truck only has 60k miles now, and this was about 10k miles ago, but they were totally smooth - only on the driver side.

    Chalked it up as weird, replaced both sides pads and rotors with the powerstop k137 kit that is well liked on this forum. Immediately noticed better bite after the brake in procedure - awesome.

    Fast forward to this week (1yr after install) and I am having a similar issue, but on the opposite side. Now, my truck pulls towards the passenger side when braking. I haven't pulled it apart yet but looking through the wheel it seems the rotor is glazed over AGAIN!! I haven't looked at the pads yet but I know they have plenty of meat.

    My question is what the hell causes pads/rotors to glaze over and become smooth??? I drive in a lot of stop and go traffic, but certainly nothing out of the ordinary. Thousands of cars drive in these conditions every day. What is going on?!

    I'll report back again when I pull them apart. Truck is a 2015 DCSB 4x4 with 60k. Also worth noting I have not replaced the calipers.
     
    Biscuits likes this.
  2. Apr 25, 2019 at 7:20 AM
    #2
    BillsSR5

    BillsSR5 Looking out for #1

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    I bought my truck used with 49k miles with the OEM brakes semi metallic version and OEM rotors were glazed it seems like the previous owner towed with it and maybe overheated the brakes to the rotor surface? I just replaced the pads to the new OEM Toyota ceramic replacements and got a pressure bleed on the fluid these seem to be working out satisfactorally and aren't glazing like the others but I just use it as a daily driver no towing.
     
  3. Apr 25, 2019 at 7:29 AM
    #3
    jv_74

    jv_74 [OP] Well-Known Member

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    Yeah I've never towed with this truck - I'm in stop and go traffic a lot but is it really the case thats pads/rotors can't handle stop and go traffic??
     
  4. Apr 25, 2019 at 7:34 AM
    #4
    BillsSR5

    BillsSR5 Looking out for #1

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    I not quite sure but I do know on getting my truck which had the semi metallic OEM with OEM rotors were glazed up both sides with meat still on the pads, I replaced with a 04665-AZ100 Toyota OEM ceramic set they aren't glazing up like the others did, I don't know if its the compounds in the ceramics that don't heat up as much or something else.
     
  5. Apr 25, 2019 at 12:55 PM
    #5
    mbrogz3000

    mbrogz3000 Well-Known Member

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    Sticky piston symptom. Rebuild the calipers (and flush the front brake fluid lines) before the pads become unlevel and require another replacement set, and possibly another rotor set (or machining). Seal kit is Toyota part number 04478 04050 for Tacoma 4x4 V6 models .
     
    Last edited: Apr 25, 2019
  6. Apr 25, 2019 at 12:58 PM
    #6
    NYCTaco52

    NYCTaco52 Half man, half goat

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    Subd, also curious about the outcome
     
  7. Apr 29, 2019 at 6:53 AM
    #7
    jv_74

    jv_74 [OP] Well-Known Member

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    Great info. Might just pick up some new (remanufactured) calipers. The symptom has been coming and going this week, sometimes I feel it, sometimes I don't - so this makes a lot of sense. Will report back.
     
  8. Apr 29, 2019 at 7:21 AM
    #8
    mbrogz3000

    mbrogz3000 Well-Known Member

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    No problem! Only caution on reman calipers is that your original calipers might be in better condition than the one receiving back as reman'd.

    I wrote up some comments here too: https://www.tacomaworld.com/threads/how-to-change-front-brakes-pads-and-rotors.353082/page-14
     
    Last edited: Apr 29, 2019
    BillsSR5 likes this.
  9. Apr 29, 2019 at 8:12 AM
    #9
    jv_74

    jv_74 [OP] Well-Known Member

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    Maybe I will just start with a full fluid flush and see if that remedies it. At 60k I'm about due anyway.

    I shouldn't need calipers at 60k, that's for sure.
     
  10. Apr 29, 2019 at 11:01 AM
    #10
    BillsSR5

    BillsSR5 Looking out for #1

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    that's a great thread, only thing im missing in it, is it necessary to open the bleeder valves when compressing the pistons? when I did mine front pads I didn't open them and got a soft pedal afterwards, I did remove the MC resovoir cap, bled and bled but eventually took it to a dealer where they power bled the system finally got a stiffer pedal, don't know it not opening the bleeders had anything to do with the soft pedal, the Toyota FSM makes no note of opening the bleeders when doing the front pads.
     
  11. Apr 29, 2019 at 11:15 AM
    #11
    DriverSound

    DriverSound Señor Member

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    Really the correct way to do them is open the bleeder valves when you compress the pistons as if you don't, it sends dirty fluid back up in the system. I haven't done brakes on my truck yet but supposedly if you have the off road version, all you have to do to bleed the brakes was to hold the pedal midway and the electric pump/accumulator does the bleeding for you.
     
  12. Apr 29, 2019 at 11:22 AM
    #12
    BillsSR5

    BillsSR5 Looking out for #1

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    I have the vacuum system, im thinking that's what happened to mine I pushed dirty fluid or air back into the system/ABS. im also thinking of getting some speed bleeders so I can easily do some Brake fluid flushes myself as part of the my maintainence routine
     
  13. Apr 29, 2019 at 12:42 PM
    #13
    mbrogz3000

    mbrogz3000 Well-Known Member

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    Seeing in person how bad and how much foreign debris is collected in the calipers - opening the bleeder screw and pressing the pistons in (if re-build isn't possible) with a pad spreader tool should always be performed when its time to install the pads. Then just top off the fluid system with some Dot 4 fluid.
     

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