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Thread: Squeaky Brakes After New Discs & Pads??

  1. #1
    Regular Member john506's Avatar
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    Default Squeaky Brakes After New Discs & Pads??

    Recently had a mate change my front brake discs and pads all round.

    Now they squeak and squeal more than they did when it was metal on metal.

    My guess is this, when he was changing the pads, he had to screw the caliper piston in to fit the new pads in, he didn't alter them all to be screwed in/out all the same.

    So when I brake, on one wheel, the piston could be pressing the pads on the disc more than another wheel, which is like the pad just resting on the disc as it's going round and not getting a tight squeeze, thus creating a squeak.

    The harder I brake the less it sqeaks, when just light braking coming up to lights or something, the screech makes me cringe.

    Does what I'm saying make any sense to what the problem could be, as I'm just a novice when it comes to cars.



    Thanks guys!

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    Regular Member crispy007's Avatar
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    do the brakes pull to one side or the other thats what happens when the piston works harder on one side than the other
    my guess is they just need bedding in
    give it a week or so see what happens

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    Regular Member john506's Avatar
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    I will check as may be popping chinese in a bit.

    It's been about 3 months and about 1500 miles later and still sqeaks

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

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    Cheap discs and pads by any chance? Cheap pads will squeal and the only answer is decent pads or live with the squeal

    Another thing to check is that the heat shield for the bottom ball joint isn't touching the disc

  5. #5
    Regular Member Vectra_C_Chris's Avatar
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    Another possible answer is were the pads and rotors worn in correctly? Now it won't change the fact that you're car is pulling to one side, but squeaking new brakes could be due to this.

    To bed in brakes. (Sorry I can't convert KM/H to MPH

    Take off to a speed of around 50km/h. Gently apply the brakes to slow the car to around 20km/h. Do this around 3-5 times. Next, do the same with slightly harder braking each time. This will bed in the brakes, and ensure that should you need to slam on the brakes after installing them, you won't completely glaze them and cause squeaking.

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    Full Member Big Sig's Avatar
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    Did he apply plenty of copper grease to the rear of the pads?
    Now I need a turbo to keep up!

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    Quote Originally Posted by Big Sig View Post
    Did he apply plenty of copper grease to the rear of the pads?

    i agree you need to put cooper grease behide the pad that will stop the sqeak

  8. #8
    Regular Member john506's Avatar
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    I'm not too sure, he was using a grey paste on loads of fixings and glue on threads but not sure on the back of the pads.

    Why does it cause a squeak if not put on back of pads?

    Also what is glazing? When he finished and I drove off I went back straight away as I wasn't happy as the car wouldn't break unless the pedal was to the floor, so he jumped in and was doing loads of emergency stops to test them, maybe this is the problem? Anyway to fix this?

    Thanks!

  9. #9
    Full Member Big Sig's Avatar
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    If there isn't any grease on the back of the pads that will make them squeal like mad.
    Now I need a turbo to keep up!

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    He should of pump the brake up and down then the hanbrake just to settle the piston down . But you really need copper grease to sort out the sqeak

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