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Thread: Problem bleeding brakes

  1. #1
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    Default Problem bleeding brakes

    Hi - I'm looking for advice with bleeding Vectra-C brakes - 2.2 DTi so electric vac pump.
    I've bled brakes before on this and several other cars so I have some experience but clearly, not enough.
    There seems to be a lot of advice here and there in the forums but unless I've missed something, nothing which solves my problem.

    I got air in the system due to a fluid leak somewhere so brakes on 2 wheels are working but 2 are not (2 diagonal systems).
    Couldn't see an obvious leak so I added brake fluid and tried to manually bleed the rear nearside caliper but nothing came out.
    I read the forum and decided to buy a Gunson Eezibleed but I still can't get anything out of the rear nearside or front offside calipers
    - even with 30 psi on the Eezibleed and even pumping the pedal at the same time.
    The other wheels bleed normally - took 200ml out of one.
    The car is off the road until it's fixed but the brakes do still stop it on the 2 working wheels.

    Also noticed that if I stop pumping the pedal for a couple of minutes - the next time I pump it's stiff even with a bleed nipple very open.
    - after that it's soft again.

    Do I need to do anything with the ABS when bleeding ?
    Could it be the master cylinder ?
    I'd really appreciate some advice.
    Thanks
    Pete

  2. #2
    Regular Member nikroc's Avatar
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    Vehicle : 2t

    Trim : standard

    Engine : z20net

    Year : 08

    Mileage : 32000

    Default

    I recently changed the brake/clutch fluid on my 2T using the eazibleed method..no problems.

    Have you tried bleeding the clutch?

    Did you find the air leak?

    Was the brake system working properley before you tried to change the fluid,ie all four brakes worked?

    Tried to bleed a transit van's brakes,same issue.Turned out to be the master cylinder.
    Last edited by nikroc; 4th August 2011 at 08:00.

  3. #3
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    Default

    Sorry for delay - birthday outings so haven't touched the Vectra

    No I haven't bled the clutch but it's working normally - does it share the same reservoir ?

    The brakes were all working well but I had a slow fluid leak.
    The level dropped too low just before I arrived home to refill so I got air in one of the systems. The brakes would stop the car but not very quickly so I haven't been on the road since.
    Never expected it to be so difficult to bleed them !

    Can the master cylinder go on one system and still work on the other ?

    Do I need to bleed the ABS unit ?

    Cheers
    Pete

  4. #4
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

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    Year : 2003

    Default

    Seals on master cylinder faulty?

    Did you find where the leak was?

  5. #5
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    Default

    Should have posted before .....
    Eventually fixed the problem by replacing master cylinder
    Proved m/c at fault by first removing battery and carrier to get access to ABS unit
    - checked each of the 2 input pipes - only one was pumping
    After fitting replacement m/c - bled 2 inputs and all 4 outputs on the ABS unit before replacing battery - brakes then bled very easily with Gunson easibleed
    Cheers Peter

  6. #6
    Regular Member lee gsi's Avatar
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    Year : 2005

    Default

    Thanks for posting an update

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