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Thread: New brakes all around and still vibration under braking!!!

  1. #1
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default New brakes all around and still vibration under braking!!!

    As above...
    Finally fitted new brakes to the Signum and so far done 100miles with them. I would imagine they were "run in" by now...So when I had to brake to go off the motorway I tried to brake a bit more than needed...and guess what happened...
    THE DAMN THINGS STARTED VIBRATING! Not sure now if I cooked the NEW discs or whatever...

    Any ideas?

  2. #2
    Regular Member Das's Avatar
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    Vehicle : Honda Civic

    Trim : SE,Panoramic Roof and Power Mirrors

    Engine : 1.8 iVtec

    Year : 2009

    Mileage : 65500

    Default

    Cheap aftermarket or from the dealers? Did you just notice the vibration after that brake off the motorway? Did you change front and rear or just front or rear? Is vibration through the steering wheel or the floor?

  3. #3
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    General Motors discs and pads! All 4 discs and pads
    Felt the vibration on the steering wheel. Not as bad as with the old brakes that's for sure

  4. #4
    Regular Member Jezzy's Avatar
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    Default

    Most likely to either be that the disks aren't mounted totally flat to the hub, i.e. there was some rust or dirt left on the hub when you put the disks on, or you've got worn bushes somewhere in the suspension - perhaps track rod ends.

  5. #5
    Regular Member Das's Avatar
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    Vehicle : Honda Civic

    Trim : SE,Panoramic Roof and Power Mirrors

    Engine : 1.8 iVtec

    Year : 2009

    Mileage : 65500

    Default

    Always possible the hub face is out of true as well.

  6. #6
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Not much rust there...Watched the mechanic do the job and everything looked nice and clean-ish before he fitted the disks.
    New track rod ends were fitted in September 2010 (15k miles since then)

  7. #7
    Regular Member m8internet's Avatar
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    Is the vibration present using engine braking, or just when you apply the footbrake?

    Strange that mine has also picked up a vibration just after the front pads were replaced
    Mine is also present during engine braking (3rd gear, 80mph to 50mph)
    My first thought was incorrectly balanced wheels, as braking quite often exagerates this
    Rebalancing the front wheels made no difference
    However, the vibration is distinctly worse on braking (5th gear, 60mph to 50mph)

    The last time this happened it took about four weeks for the vibration to disappear
    I suspect once the disc has had a set of pads on it, the new set takes some time to wear and match

    However, I also have a rumbling noise which appears to come from the nearside
    The car has been up on the ramp and the front was fully inspected, but nothing could be found (apart from the droplinks near to the end of their life, but I already knew about that)

    The car has been booked in for a service in three weeks time, hopefully by then the vibration on braking might have disappeared (as per previous)
    If not, I'll ask them to investigate further, as the wheels need to come off on this service anyway
    Last edited by m8internet; 1st March 2011 at 22:09.

  8. #8
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    m8internet
    Definitely when I apply the footbrake. Under engine braking everything is fine.

    I had new droplinks, track rod ends, track rods and wishbones fitted in September. The only thing I think could be causing this is the CV-joint or driveshaft, but this would show under acceleration (it does vibrate under throttle), not braking.

  9. #9
    Ex Vec-C Admin & Founder GARY3306's Avatar
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    If the vibration is through the steering, then the discs are running true. If the discs were not seated correctly, the pedal would pulse up and down under foot as you braked.
    If there wasn't any vibration through the steering before you had the discs/pads done, then my guess is that there is some sort of contamination on the new disc(s), ie some of the protective coating left on, or some other means of lubricant on the braking surface. This would give the vibration through the steering. This will probably burn off soon enough. Oh, and you can't 'cook' your discs by breaking heavily so don't worry on that score

    Something else to check is all suspension joints on the steered wheels. If one is worn, ie a bottom wishbone ball joint, that would give a similar result.

    EDIT: You were obviously typing about having all that suspension work done as I was typing lol
    [SIGPIC]VX<font color=Red>R</font> with added Courtenay <img src=https://www.vectra-c.com/forum/images/smilies/biggrin.png border=0 alt= title=Big Grin class=inlineimg />

  10. #10
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    Quote Originally Posted by Celes View Post
    m8internet
    Definitely when I apply the footbrake. Under engine braking everything is fine.

    I had new droplinks, track rod ends, track rods and wishbones fitted in September. The only thing I think could be causing this is the CV-joint or driveshaft, but this would show under acceleration (it does vibrate under throttle), not braking.
    Just to clarify it only does it when braking?

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