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Thread: Brake Disc's

  1. #1
    Regular Member slipperysam1984's Avatar
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    Default Brake Disc's

    Hi,
    I need to replace the rear brakes on my siggy soon, and i wanted to know how do you know if the disc needs replacing as well.

    I don't want to put pads on and find that the disc is screwed.

    So do you replace the disc's after so many pad changes?

    thanks in advance

    Sam

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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

    Default

    My rear discs were changed at the first pad change as they were quite worn down.

    If you buy the parts from Vauxhall then it's cheaper to buy a brake disc/pad kit than it is to buy the discs and pads separately. Can also apply to other sellers as well. Thought I'd mention it in case you bought the pads on their own then discovered later that you also need discs as well.

  3. #3
    Regular Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

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    The discs need replacing if they are very heavily scored and/or rusty. You will know if they are heavily worn by the lip on the edge of the disc caused by the pad wearing the metal of the disc away. There's no set point to replace discs, one look at them should tell you if they are serviceable or not.

  4. #4
    Regular Member jonnybravo's Avatar
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    Vehicle : Signum


    Engine : 20 Dti


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    Hi SS
    minimum thickness for rear discs (ventilated) 18mm
    minimum thickness for rear discs (solid) 10mm

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    Regular Member dcm23251981's Avatar
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    Default

    hi guys had front and rear discs and pads fitted back in august and over the last coupler of days there has been a loud squealing noice from the f o s after inspection there is 2 rings not heavily scored but what can be the problem help ??????

  6. #6
    Regular Member dcm23251981's Avatar
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    Default vectra c 54 plate scored disc

    had new discs and pads fitted back in august and a couple of days ago the front o s started squealing after inspection there is 2 rings in the centre but not heavily scored what could it be help

  7. #7
    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

    Trim : LE/VXR

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    Sound's like the common problem of the heatshield behind the disc touching the disc

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    Quote Originally Posted by dcm23251981 View Post
    had new discs and pads fitted back in august and a couple of days ago the front o s started squealing after inspection there is 2 rings in the centre but not heavily scored what could it be help
    You could have a small stone stuck between the disc and pad. Happened to me on my old golf. Just remove the pad and inspect them.

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    Default

    Quote Originally Posted by slipperysam1984 View Post
    Hi,
    I need to replace the rear brakes on my siggy soon, and i wanted to know how do you know if the disc needs replacing as well.

    I don't want to put pads on and find that the disc is screwed.

    So do you replace the disc's after so many pad changes?

    thanks in advance

    Sam
    As mentioned above, but also look at the hub part of the disc, it should say the min thickness. Mine are solid and read MIN 10mm.

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