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Break Fluid Amount

Discussion in 'Leon Mk2' started by Jfox, Jun 6, 2018.

  1. Jfox

    Jfox Full Member

    Nov 8, 2012
    Likes Received:
    Hi guys,

    Due to change my pads very soon and want to put some better fluid in.

    Currently have some normal every day fluid and get a fair bit of fade with some spirited driving so while upgrading my pads i am going to replace the fluid too.

    My question is, how much fluid do i need for a full replacement?
    500ml or1L or more/less?


    PS, it would also be helpful if i managed to spell brake fluid correct in the title haha.
  2. Rusty2k

    Rusty2k Full Member

    May 12, 2013
    Likes Received:
    The proper procedure in the service manual is to draw 250 ml of fluid through each corner.

    You need to keep the fluid pressure quite low during the process. If the fluid pressure exceeds 1 bar (14.5 psi) a valve inside the ABS unit closes which cuts off the unit's internal reservoir and you won't get a complete flush of the old fluid and could even get air stuck in there.

    The clutch (if you have a manual car) needs 150 ml of fluid drawn through for fluid replacement.

    In reality I suspect you'd be fine pulling a little less through each caliper if you wanted to do the brakes and clutch from 1 litre of fluid. Always an idea to have spare fluid though, in case you accidentally introduce air into the system during the fluid replacement and need to re-bleed it.

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