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Front calipers keep locking up

Discussion in '1st Gen Tundras (2000-2006)' started by ifox, Jun 28, 2021.

  1. Jun 28, 2021 at 6:04 PM
    #1
    ifox

    ifox [OP] New Member

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    I've got a 2001 1st gen v8 4x4 and about 2 years ago I changed the calipers because one was sticking. About 3 months ago the passenger side seized completely, I only changed that side. Now they are both seized. I can't find a single leak anywhere in the lines and they had been bled properly and worked perfectly up until the point of siezing. I know I should've change them both but why do they keep prematurely seizing?
     
  2. Jun 28, 2021 at 6:06 PM
    #2
    15whtrd

    15whtrd Mr. Blonde

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    I’d change the hoses too. They can fail internally and act like a check valve.
     
    tvpierce, NewImprovedRon and Tundra2 like this.
  3. Jun 28, 2021 at 6:06 PM
    #3
    Tundra2

    Tundra2 Zoinked

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    I'm no brake expert, at all. Take everything I say with a grain of salt.

    Is it possible there's crud in the brake system? Debris?
     
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  4. Jun 28, 2021 at 6:08 PM
    #4
    Tundra2

    Tundra2 Zoinked

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    Didn't know this.

    I changed mine in December to Wheelers stainless steel.
     
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  5. Jun 28, 2021 at 6:08 PM
    #5
    des2mtn

    des2mtn Ridgeline with a 4-speed

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    Did you grease the slide pins and the slides between the caliper and brake pad ears?

    [​IMG]
     
  6. Jun 28, 2021 at 6:11 PM
    #6
    landphil

    landphil Overland or oversee?

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    A pedal pushrod that’s adjusted too long (if adjustable) so the master cylinder doesn’t fully return, or a plugged return port in the master cylinder can also hold pressure in the calipers and make it appear that they are seized. Crack the bleeder open and see if any pressure releases.

    Did you flush new fluid into the system when you replaced the calipers? DOT 3 /4 absorbs moisture over time, and becomes corrosive as that happens.

    Where are you getting your parts? What brand? There are lots of terrible remans on the market too.
     
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  7. Jun 28, 2021 at 6:15 PM
    #7
    15whtrd

    15whtrd Mr. Blonde

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    Darkness likes this.
  8. Jun 28, 2021 at 6:15 PM
    #8
    KNABORES

    KNABORES Elitist forum troll

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    I've had 3 calipers seize on me. Thankfully they are lifetime warranty from Oreilly's. The pistons don't seem to seal well and get stuck in their bores. This set has lasted me a couple years thankfully.
     
  9. Jun 29, 2021 at 9:32 AM
    #9
    Sirfive

    Sirfive Master Procrastinator

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    Once you pick up a hammer every problem looks like a nail.

    The brakes on my grandpas truck drug, the pads and rotors were glazed, sometimes they would drag, sometimes they wouldnt.

    i did powerstop pads and rotors, that come with new pins and clips, and found the original pins worn way out, so i filed the edges if the calipers, where the pads ride, smooth. I replaced all the rubber hoses, because truck is 19 years old, and the master cylinder.

    I could feel through the pedal (by hand) that the master cylinder was hanging up about 1/2 way down, so i gave the master cylinder a sharp whack with a small hammer, and it fixed it, but not permanently. So swapped the master cylinder, wrung my hands worrying about a non issue with the brake booster, and its been great ever since.
     
  10. Jun 29, 2021 at 9:59 AM
    #10
    Booney

    Booney New Member

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    If you find that it isn't the calipers or brake lines you might check the brake proportioning valve.
     
  11. Jun 29, 2021 at 10:06 AM
    #11
    Badknees

    Badknees New Member

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    Where do you live? Different vehicle but same brakes; I had this trouble with my 3rd Gen 4Runner Tundra brake upgrade when my kids lived near the coast = excessive corrosion. Also, their driving habits weren't hard enough on the front brakes to keep the pistons moving enough.
     
  12. Jun 29, 2021 at 6:31 PM
    #12
    ifox

    ifox [OP] New Member

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    So I have always properly greased them, the first set was nappa, the 2nd one was some after market from oreillys. I always flush and bleed. I have changed the bent line going strait to the caliper and the rubber line going up past that but no lines to the booster or master cylinder. Thanks for all the input I just changed all calipers rotors and pads, and I will now change the lines leading up until them at the least
     

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