Aftermarket MBC

  • #1

    Aftermarket MBC

    My master brake cylinder to my '87 daily driver needs rebuilt or replaced. I am leaking a reservoir full in two days time. My first inclination is to go with the OE rebuild kit avaialble on e-Bay for about $85 I think. But, then I read that if there is any corrosion in the MBC body that it should be entirely replaced and I won't know that until I pull it all loose. Are there any good brands available thru NAPA or Car Quest etc. that are reliable and a better value than shelling out around 200 clams for Nissan? This will be my first MBC rebuild but, I'm not too worried about that. Thanks in advance.
    Everything is Meaningless.
  • #2
    MBC manual boost controller. BMC brake master cylinder. I've had luck with used ones.
    Cha iro

    enjoy building it yourself.
    if it fails, fuck it.
    at least you gave it a whirl.
  • #3
    Rebuilt is hit or miss like anything, sometimes they rebuild corroded cores too by honing them out a little… best thing to do is crack it open first and then decide, I'm guessing rebuilding would be fine
  • #4
    The Nissan rebuild kit is NOT $200. Open it up and decide. Rebuilding them is cake. Just make sure to have a few cans of brake clean and a pipe brush to clean out the bore to inspect for scoring/corrosion. Most of the time the lip seals on the pistons wear out and leak.

    1986 300ZX Turbo…sold
    1990 Skyline GT-R…new money pit
    2014 Juke Nismo RS 6-speed…daily
  • #5
    Thanks. I'm going to get the Nissan rebuild kit for around $85.

    Augustus- Thanks, I knew MBC looked funny as I was typing it.
    Everything is Meaningless.
  • #6
    One more question. I looked in the FSM and in the Haynes and neither manual mentions how to remove the reservoir. Does it simply pry out? Thanks.
    Everything is Meaningless.
  • #7
    Yeah, it pops out.
    I can't find it now but, i posted photos awhile ago of the rebuilt BMC i got from NAPA.
    It was a oem Nissan core.


    84 AE/Shiro #683/Shiro #820/84 Turbo
  • #8
    Thank You. Yes, I just opened up the box from O Reilleys and it's an OEM Nissan core.
    Everything is Meaningless.