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Knocking sound while breaking

  • 22-06-2010 6:07pm
    #1
    Donal199
    Registered Users, Registered Users 2 Posts: 37 ✭


    Hi, i recently bought a honda 1.7 diesel, and i noticed while braking there is a knocking sound coming from the back, there is also movement in the brake pedal, the car has had new brake pads fitted recently and i was wondering if this was the problem and if not, then what is?


Comments

  • #2
    Bigus
    Registered Users, Registered Users 2 Posts: 4,946 ✭✭✭Bigus


    Its either warped discs or Drums gone oval from the mechanic banging with a hammer to get them off( only applies to drums) Need two new drums, or two new rear discs
    BTW its Braking not breaking


  • #3
    Donal199
    Registered Users, Registered Users 2 Posts: 37 ✭Donal199


    sorry, only realised i spelt it wrong when it was up. It has discs all round, so that would be an expensive fix would it? Or would it be safe to leave it as it is?
    Thanks Bigus


  • #4
    Bigus
    Registered Users, Registered Users 2 Posts: 4,946 ✭✭✭Bigus


    No ; price a set of discs in a motor factors. If it was lying up for a while it might be excessive rust on the surface of the disc and less where the pads covered it from the rain. Try and diagnose the proB by freewheelin each of the four wheels jacked up even one at a time.
    OR jack up the front and test it in second gear with your foot lightly on the brake pedal to eliminate if its the front causinfg the prob float in the pedal .


  • #5
    Damien360
    Registered Users, Registered Users 2 Posts: 6,782 ✭✭✭Damien360


    Could just be a buckled alloy. I hit a very large pothole a few weeks ago and had the same sympthons. Had to change the wheel to fix. There was a knocking noise when running but it got a lot worse on braking.


  • #6
    Donal199
    Registered Users, Registered Users 2 Posts: 37 ✭Donal199


    Thanks Bigus, i'l try that, the car is lowered so it would be easier to buckle a rim, it only knocks under light braking btw


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  • #7
    Average-Ro
    Registered Users, Registered Users 2 Posts: 1,161 ✭✭✭Average-Ro


    I have the same problem with my car. She was left idle for about 6 months so could it be the rust?

    Is this a huge problem? Should I get it fixed ASAP or am I ok leaving it for a week or two to get finances together?


  • #8
    corktina
    Closed Accounts Posts: 17,733 ✭✭✭✭corktina


    could it be the old "mother-in-law in the boot" thing?:D

    If this only started since you had the pads fitted, pop it back to the garage, I'm sure the'y check it out for you, could be that the pads havent bedded in yet.


  • #9
    cjt156
    Registered Users, Registered Users 2 Posts: 2,062 ✭✭✭cjt156


    Could also be after-market pads that aren't an exact fit in the caliper; causing them to shift slightly and click as the pad bites. I've had this before - makes a pronounced knock but brakes work fine.


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