Mastercylinder failure

Discussion in '2016 + Toyota Tacoma' started by steeltoe, Jan 12, 2019.

  1. steeltoe

    steeltoe Member

    Anyone else's 2017/18 4×4 mastercylinder reservoir showing signs of discoloration ? tapatalk_1547352086769.jpeg
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  3. Bogunn

    Bogunn Well-Known Member

    No. Sorry man. I don’t really see any real discoloration in the pic.
    Maybe I can’t see it well enough.
    AZ Pete, kp.taco and B-Man like this.
  4. Crawdad

    Crawdad Well-Known Member

    B-Man likes this.
  5. Crawdad

    Crawdad Well-Known Member

    Looks like brake fluid to me. 20190112_221135.jpeg
    Bogunn, kp.taco and B-Man like this.
  6. OP

    steeltoe Member

    3rd gen 4×4 with craw control . Screenshot_20190112-225634_Gallery.jpeg
  7. BigMau

    BigMau Well-Known Member

    Looks like material at the top of the reservoir?
    steeltoe and B-Man like this.
  8. Crawdad

    Crawdad Well-Known Member

    Remove it with a turkey baster and put fresh in it?
    B-Man and BigMau like this.
  9. OP

    steeltoe Member

    At toy dealer , awaiting an answer to mysterious layer of death to my master cylinder . Educated guess , its probably piston seal breakup material or abs pump seals floating up top .
    B-Man likes this.
  10. mcklovin77

    mcklovin77 Well-Known Member

    Only time that happened to me is when someone added power steering fluid to my brake reservoir. Made the master cylinder seals and the rubber part of the brake lines to swell and fail. That might be the problem. Some dumb ass mechanic topped off your reservoir with power steering fluid probably.
    B-Man likes this.
  11. BigMau

    BigMau Well-Known Member


    Good move taking your truck to the dealer. Let us know how you make out??


    That wouls suck if someone did that to steeeltoe's master cylinder:(
    B-Man and mcklovin77 like this.
  12. John Krumlauf

    John Krumlauf Member

    I purchased a new 2018 end of year. Before I could pick up, they had to complete a recall that was to replace master cylinder. I thought it was for potential leaks, but sounds like you should have it replaced regardless.
    OR17TRD and B-Man like this.

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