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Thread: Air in brake system keeps coming back

  1. #1
    Regular Member looloo2's Avatar
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    Default Air in brake system keeps coming back

    Right the story so far is that the car needed a new master cylinder which was fitted around 9 months ago, after this the car was fine for around 3 to 4 months

    However afterwards the pedal started to feel as if air was back in the system, and the pedal lost its feel and gained more travel unless pumped. Now after multiple bleeds the problem remains however by bleeding the brakes the problem disappears for a month and then slowly returns.

    the system has been pressure bled and manually bled multiple times so suggestions would be grateful!

  2. #2
    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Check master cylinder seal its probably drawing in air

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    Regular Member looloo2's Avatar
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    Even though its not that old they could be perished already ?

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    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    It could be they where damaged.

  5. #5
    Regular Member looloo2's Avatar
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    Okay bud cheers ill check it ASAP

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    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Also worth doing a complete check of brake lines and abs pump. Checking for corrosion and any sign of and fluid.'

    fliiding getting out means air can get in

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