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Thread: MK4 brake servo/master cylinders - are they all the same?

  
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    nry's Avatar
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    MK4 brake servo/master cylinders - are they all the same?

    I think I'm right in saying that the MK4's all use the same master cylinder, be it a GSi Turbo or a 1.4? Do they also all use the same servo?

    The garage who changed my brake fluid asked if I changed the servo or master cylinder when I went from read drums to discs and fitted the 280mm discs up front vs the old 256mm ones (new calipers here too).

    I know enough people here have gone to 280mm/rear discs from 256mm/drums to assume that mushy pedal feel after the conversion shouldn't be down to a servo/master cylinder being too small for the job, so anyone info would be appreciated

    They're going to have a look on Wed evening, and re-bleed if necessary.

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    Any ideas people?

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    servo's are 10" across the range, the only different master cylinder is astra's with ESP which have 2x12mm outlets as opposed to normal master cylinder that has 1x10mm and 1x12mm outlet

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    Cheers, just what I wanted to know

    What it does mean though, is that my wife's Zafira, having ESP, has a different master cylinder. Would this mean her brakes would be any firmer than mine (as they are very noticeably)?

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    Quote Originally Posted by nry View Post
    Cheers, just what I wanted to know

    What it does mean though, is that my wife's Zafira, having ESP, has a different master cylinder. Would this mean her brakes would be any firmer than mine (as they are very noticeably)?
    ESP would not make a difference, you either need a re-bleed or a new set of flexi hoses. did you renew the hoses when you did the brake upgrade, because with the upgrade you did, i would have put braided lines on too.

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