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Strange Problem after Changing front Brakes

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Petejoe, Oct 10, 2009.

  1. Oct 10, 2009 at 10:32 AM
    #1
    Petejoe

    Petejoe [OP] Member

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    Hello everyone. New here, been a Tacoma owner for 20 Years.
    In the process of bleeding the front brakes after changing the pads I ran into an issue I have never seen.
    I do know the correct process for bleeding brakes.
    I opened the bleeders before starting and did not compress the pistons.
    I was able to remove all the air from the system but wasn't happy with the pedal heigth so I decided to re bleed.
    When I asked my wife to apply pressure to the brakes when I was bleeding one caliper the pedal suddenly went the whole way to the floor very quickly.(quicker than you'd expect during the bleed process.
    I closed the bleeder and asked her to pump the system and I tried it again. I lost all pressure to the brake.
    I pulled the line off at the caliper and found no pressure there either.
    I checked the other wheel and found it too didn't have pressure.
    I closed the bleeders and checked for leaks and made sure the master was full. Everything was ok. i started the truck up and had her repump it.
    The pressure returned on one wheel but not the other one.
    Did I stir up some dirt in the system??
    Any way to fix it. I am stumped.
     
  2. Oct 10, 2009 at 12:09 PM
    #2
    LBtaco

    LBtaco Thread killer

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    not sure about your bleeding process and tools used, but maybe sounds like a lot of air in the one caliper? re-bleed them and make sure your wife knows what to do, I had a bad helper once on an older car and had to redo them.
    one of these days im going to get that vacuum powered bleeder, the one that hooks into the master cylinder and forces the fuild in. then you just get under and open the valves to bleed, no pumping or holding the pedal.

    good luck.
     
  3. Oct 10, 2009 at 2:24 PM
    #3
    Petejoe

    Petejoe [OP] Member

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    Thank you for the response.
    I did have to disassemble one caliper to change a broken bleeder valve.
    This is the area with no pressure showing.
    By no pressure, I mean no air no brake fluid, nothing...
    This (no pressure) is at the caliper bleeder and even at the brake line after removing it from the caliper during the (pedal down) process of the bleeding. The no pressure stumps me.
    Bleeding process was as follows.
    Installed a rubber hose onto the bleeder valve and the other end in a can of brake fluid.
    Pump the system.. Open bleeder.. pedal down... hold... Close bleeder .. pedal up. Repeat until all air leaves the sytem. Same for other wheel.
    Wish I had a vaccuum bleeder.
     
  4. Oct 11, 2009 at 8:11 AM
    #4
    Janster

    Janster Old & Forgetful

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    Don't pump the brakes during the bleeding process. By doing that, you're only 'breaking up' the air bubbles into smaller bubbles and could possibly cause them to lodge themselves into places that are harder to get rid of (and harder to see).


    At this point - you might wanna consider bleeding the entire system (all 4 corners) and go from there.
     
  5. Oct 11, 2009 at 8:15 AM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    FWIW, I have read that Jansters method IS the best way to do it....Other than a power bleeder...
     
  6. Oct 11, 2009 at 7:11 PM
    #6
    Petejoe

    Petejoe [OP] Member

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    Thanks for the insight.
    I will be tackling this again tomorrow. I'll give an update on my findings.
     
  7. Oct 12, 2009 at 12:20 AM
    #7
    JKD

    JKD Well-Known Member

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    Anyone tried Speed Bleeders before?

    I put them on my last vehicle, and it made brake bleeding a simple one person job.
     
  8. Oct 12, 2009 at 1:30 AM
    #8
    thisERICtaco

    thisERICtaco Well-Known Member

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    i would suggest a gravity bleed
    put your car on jacks on all 4 sides
    open all the bleeder screws but not all the way. like a drip every 3 seconds
    do this for about lets say 15 mins. then bleed the whole system like normal
    pump 3 times. open. oil squirts out. close repeat. about 8 times per caliper.
    and i think you would be done
     
  9. Oct 12, 2009 at 1:50 PM
    #9
    Petejoe

    Petejoe [OP] Member

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    Spent the afternoon on it again.
    The "No pressure" was traced clear back to the ABS block.
    The other side has plenty of pressure. Tried a variety of different things some that was mentioned here. Finally talked to a friend who is into brake service and he explained the ABS unit should be heard to kick on when the key is turned on. Mine does not make a sound. He explained if one side is working air can still be in the system and the written procedure shows to use a scanner to turn on the ABS pump to bleed it. YUK>>
    He also told me "before bleeding" the procedure indicates to turn the key on and start the car for 15 seconds before starting any and all bleeding procedures. That was something I didn't even think of.
    Looks like my 40.00 brake job is going to turn into a 120.00 one real quick.
    Live and learn. I hate new cars...give me simplistic 1930's and 40's technology anyday... old backyard mechanic petejoe


    [​IMG]
     
  10. Oct 12, 2009 at 4:11 PM
    #10
    lawnrevenge

    lawnrevenge Well-Known Member

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    I hate abs. Glad to know from your experience. And incase no one else has said it yet, welcome to tacomaworld.
     
  11. Oct 16, 2009 at 5:04 AM
    #11
    Petejoe

    Petejoe [OP] Member

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    Thanks.
    I ended up biting the bullet and took it to a Toyota garage,
    Bad news..
    It had metal filings in the system. Some must have gotten into the ABS passage. This was a result of a broken bleeder I had to replace at the caliper. Sure didn't save any money on this brake job. :(
    Live and learn... I intend to try some compressed air to remove it.
    Ether way a replacement ABS module may be necessary. Yuk
     
  12. Oct 16, 2009 at 10:48 AM
    #12
    LBtaco

    LBtaco Thread killer

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    damn, i was thinking some dirt or junk got in the lines because you had the problem with the one bleeder but I didnt want to say it :confused:
    shit it got to the ABS pump? damn that sucks and of course the dealer doesnt repair anything, they just replace parts. good luck
     
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