Odd Sound While Braking

Discussion in 'Community Discussion' started by malman89, Aug 1, 2013.

  1. malman89 macrumors 68000

    Joined:
    May 29, 2011
    Location:
    Michigan
    #1
    I've got a 2010 Ford Focus SES and a couple times lately (very random, very rare) while braking, I hear a noise coming from the front end that is sort of deep and like 'wuh wuh wuh wuh.' I thought of metal on metal, but nothing feels like it's grinding.

    The car itself is a Certified Pre-Owned, now up to 47,800 miles.

    Tires are fairly new with just over 5,000 miles on them.

    I just had the car checked out last week too and nothing negative was marked with the brakes. The fronts were listed at "70% 7MM" on my last check up.

    Is it something to be concerned about? Is it a brake issue or possibly something else?
     
  2. JohnLT13 macrumors 6502a

    JohnLT13

    Joined:
    Dec 9, 2012
    Location:
    Boston (aka Red Sox Nation)
    #2
    sounds like a wheel bearing, better get that checked asap. and get an oil change, your overdue.:D Good luck.
     
  3. wordoflife macrumors 604

    wordoflife

    Joined:
    Jul 6, 2009
    #3
    Brake pads have these metal things that poke out once they start to become thin, so they make a noise alerting you to change them out. maybe its that

    [​IMG]
     
  4. sonicrobby macrumors 68020

    sonicrobby

    Joined:
    Apr 24, 2013
    Location:
    New Orleans
    #4
    I agree with John. Ive had this issue before with my car, and the bearing was the issue. The sound was present mostly when breaking, but over time I did begin to hear it accelerating or maintaining speed. Try to listen when you break if the wuh wuh sounds decrease in frequency while your rpm drops and speed up to see if you can hear the sound at all/if it is increasing in frequency.

    I dont think it's the breaks, they would make a long screech type noise instead of a repetitive wuh wuh sound.
     
  5. velocityg4 macrumors 68040

    velocityg4

    Joined:
    Dec 19, 2004
    Location:
    Georgia
    #5
    Check the brake pads and see if they are worn out. If they are still thick then it is likely the wheel bearing. You can try jacking it up and push and pull on the top of the wheel to see if it flexes in and out which is a sign of a bad bearing.

    Anyways pick up the Haynes manual for your car a your local auto parts store and replace away. From experience don't buy the cheapest replacement part they have get whatever the best is they carry. For the most part higher priced and quality parts last much longer. You don't necessarily need the most expensive at least go middle of the road.
     
  6. malman89 thread starter macrumors 68000

    Joined:
    May 29, 2011
    Location:
    Michigan
    #6
    Oil change was part of the maintenance, so I'm all set there.

    The noise does decrease in frequency with speed. I've never heard it while accelerating. I've heard it probably 2 times total in a little over a week. I've got some free time this weekend, so I'll take a look.
     
  7. designs216 macrumors 65816

    designs216

    Joined:
    Oct 26, 2009
    Location:
    Down the rabbit hole
    #7
    Seems like if it were the bearing, he'd hear it all the time. I'm guessing the rotor is warped - the sound may be from the flat surface of the caliper pushing against the wavy surface of the disc. Just a shade-tree guess -- get it checked by an ASE certified mechanic you trust!
     
  8. 4JNA macrumors 68000

    4JNA

    Joined:
    Feb 8, 2006
    Location:
    looking for trash files
    #8
    it's not the shift knob.

    i'll add my vote to this column. bearings in my experience have always presented as a constant or repeatable pattern noise.

    where i differ from the previous post is that warped rotor also usually (usually) present as a constant or repeatable pattern noise, but can on the odd situation change due to heat/moisture/etc. sometimes noises are tricky beasts.

    other thing to check IMO would be a CV joint. there are four, two inner, two outer, look at all the boots to make sure they are intact, jack up the wheel and turn by hand while feeling the joint for movement, repeat on the other side.

    if nothing else works, just give it a Mexico City brake job - Install a bigger horn! best of luck.
     
  9. Shrink macrumors G3

    Shrink

    Joined:
    Feb 26, 2011
    Location:
    New England, USA
    #9
    Just a really simple suggestion...

    Whatever it is, it's probably not a good thing and I, for one, would take it to a qualified mechanic for a look see.

    If it's brakes...I REALLY would take it in...but that's just me as I have this serious concern about being able to stop my car.

    Call me crazy...:p

    ;) :D
     
  10. 4JNA macrumors 68000

    4JNA

    Joined:
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    Location:
    looking for trash files
    #10
    you're crazy.
     
  11. Shrink macrumors G3

    Shrink

    Joined:
    Feb 26, 2011
    Location:
    New England, USA
    #11
    Call me a cab...
     
  12. 4JNA macrumors 68000

    4JNA

    Joined:
    Feb 8, 2006
    Location:
    looking for trash files
    #12

    Taxi, take this random user to XKCD. :)
     
  13. Shrink macrumors G3

    Shrink

    Joined:
    Feb 26, 2011
    Location:
    New England, USA
    #13
    Excellent destination! :)
     
  14. AlphaDogg macrumors 68040

    AlphaDogg

    Joined:
    May 20, 2010
    Location:
    Boulder, CO
    #14
    Let me clarify something for you guys.

    Is NOT the same as

     
  15. 4JNA macrumors 68000

    4JNA

    Joined:
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    Location:
    looking for trash files
    #15
    wait, what?!? you just past participle broken my train of thought, and now i don't remember what i was going to add.

    i'm sure it would have been something useful related to 'odd sound'. ok then.
     
  16. designs216 macrumors 65816

    designs216

    Joined:
    Oct 26, 2009
    Location:
    Down the rabbit hole
    #16
    Another possibility is an issue with the ABS. Again, get it checked!
     

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