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Thread: Spongy brakes after pad change

  1. #1
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    Default Spongy brakes after pad change

    Hi Guys,

    Changed my pads today and now the brakes are very spongy, if I pump the brake pedal a few times it stiffens up and then goes spongy again, im assuming I have an air lock? How do I rectify this please?

    Cheers
    Jazz.

  2. #2
    VIP-Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

    Default

    New pads on old discs? Its pretty normal as the whole of the new pad is not in contact with the whole of the worn disc face. Give them a few miles to bed in and they will be fine. I assuming you didn't bleed them?

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    i had to slacken the bleed nipple to push the piston back?

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    Regular Member alcutler's Avatar
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    Vehicle : vectra c 1.9cdti 120 estate

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    Thats how you've got air in the system then - they need bleeding to purge the air out there's no need to undo the nipple to push the pistons back.

  5. #5
    VIP-Member Das's Avatar
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    Ah ok, yes possible you've got air in the system. Did you just open the nipple and close it when the piston was back?

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    Quote Originally Posted by DasArab View Post
    Ah ok, yes possible you've got air in the system. Did you just open the nipple and close it when the piston was back?
    I opened the nipple, pushed the piston back and then retighten nipple

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    Quote Originally Posted by alcutler View Post
    Thats how you've got air in the system then - they need bleeding to purge the air out there's no need to undo the nipple to push the pistons back.
    I tried to push it back without but it wouldnt budge so had to undo it?

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    VIP-Member Damo77's Avatar
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    Vehicle : Vectra

    Trim : SRi

    Engine : 1.9 CDTi 8v

    Year : 55

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    I thought that when you push the pistons back all you had to do was take the cap off the Master cylinder reservoir
    Already replaced:-
    Alternator,
    Drilled/Grooved Discs & Pads, Eibach Springs, EGR Valve, 50W HID's 6000k, K&N Panel Filter, LED footwell & boot lights

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    Regular Member alcutler's Avatar
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    Its no big problem - just needs bleeding - do you know how to do it

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    Quote Originally Posted by Damo77 View Post
    I thought that when you push the pistons back all you had to do was take the cap off the Master cylinder reservoir
    Tried. Would not budge, loosened the bleed nipple and went back easy enough

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