::::Car question::::

Discussion in 'Community Discussion' started by BrettFarve04, Dec 28, 2008.

  1. BrettFarve04 macrumors regular

    Joined:
    Sep 14, 2007
    Location:
    Milwaukee, WI
    #1
    Hey all,

    I have a 04 Civic Ex Coupe...and whenever my car is idling i hear a constant rattle. Whenever i tap on the gas the sound goes away. Anybody have any ideas??
     
  2. yoyo5280 macrumors 68000

    yoyo5280

    Joined:
    Feb 24, 2007
    Location:
    Melbourne, Australia & Bay Area
    #2
    Yup!
    Call car talk. I'll be listening for ya! :p
     
  3. iVeBeenDrinkin' macrumors 65816

    iVeBeenDrinkin'

    Joined:
    Oct 17, 2008
    #3
    Maybe a cylinder misfire, do a diagnostics check.
     
  4. silbeej macrumors 6502a

    Joined:
    Feb 3, 2007
    #4
    Exhaust. Some piece of metal is probably rattling. Happened on my 99 Subaru, at 2500 RPM every single time. But you also didn't provide a lot of info, cuz it could be almost anything. Have someone, or yourself, stand outside and try to pin point where along the car it is. Mine was right under the driver/passenger space.
     
  5. bobfitz14 macrumors 65816

    bobfitz14

    Joined:
    Oct 14, 2008
    Location:
    Massachusetts
  6. Frisco macrumors 68020

    Joined:
    Sep 24, 2002
    Location:
    Utopia
    #6
    I also think it's something to do with your exhaust.

    I have had a rattle now for a year on my 92 Accord. It's the heat shield, which rattles when cold, when the car warms up the rattle goes away. It's not a big deal I can live with it or remove the heat shield.
     
  7. InvalidUserID macrumors 6502a

    InvalidUserID

    Joined:
    Sep 7, 2008
    Location:
    Palo Alto, CA
    #7
    Likely a small crack in the exhaust manifold, especially if it is like a ticking noise that changes in relation to RPMs.
     
  8. és: macrumors 6502a

    és:

    #8
    Almost certainly your exhaust (although, there are some very rare problems that it could also be). It could be something as simple as a loose bracket or joint, to something slightly more serious like needing a new catalytic converter or a crack in the manifold or downpipe. You'll have to take it into a place. If it's something minor then it'll be pretty cheep. Even if it's one of the more major things then it will still be relatively affordable.

    Need to check it out, though.
     
  9. Demosthenes X macrumors 68000

    Demosthenes X

    Joined:
    Oct 21, 2008
    #9
    Exactly right. I had the same thing on my 99 Civic - took literally 30 seconds to tighten down the heat shield, hasn't bothered me since.
     
  10. dmr727 macrumors G3

    dmr727

    Joined:
    Dec 29, 2007
    Location:
    Southern California
    #10
    Like others have said, it's probably in your exhaust somewhere. It could be your catalytic converter. I had a small piece of metal break off and rattle around in there. I let it go for awhile, but eventually the cat failed completely and I had it replaced.
     
  11. Lord Blackadder macrumors G5

    Lord Blackadder

    Joined:
    May 7, 2004
    Location:
    Sod off
    #11
    I've had the same thing happen before; if it is a metallic rattle that goes away when the engine is revved, it's probably an exhaust hangar or heat shield that has broken / rusted loose.

    As others have suggested, start the car in your driveway, let it idle and crawl around to see where the noise is coming from. Having an exhaust hanger replaced is cheap. Heat shields less so, but still relatively inexpensive.
     
  12. nickspohn macrumors 68040

    nickspohn

    Joined:
    Jun 9, 2007
    #12
    It's rod knock! That's what you get when you buy a Honda ;)



    KIDDINGGG GUYS
     
  13. RITZFit macrumors 65816

    RITZFit

    Joined:
    Sep 16, 2007
    Location:
    In my Corner
    #13
    its most likely a heat shield. just have a friend pop it in neutral and rev it a little, then try to pin point the noise
     
  14. NightFlight macrumors 6502

    NightFlight

    Joined:
    Feb 25, 2007
    Location:
    Northern Virginia
    #14
    x2.

    Heat shield was my first guess....
     
  15. ErikCLDR macrumors 68000

    Joined:
    Jan 14, 2007
    #15
    I say exhaust related most likely a heat shield probably on the catalytic converter. Usually their just barely welded on and can come undone.

    You may also want to check to see if there is a large plastic or metal plate on the bottom of the car to keep dirt out of the engine. The hardware can come undone and make the plate rattle.
     
  16. VPrime macrumors 68000

    VPrime

    Joined:
    Dec 19, 2008
    Location:
    London Ontario
    #16
    Also check your exhaust hangers.

    I know some hondas do not use a flex pipe where the exhaust meets the header, instead use a spring like system (where it bolts onto the header) you may want to check there as well.
     
  17. leekohler macrumors G5

    leekohler

    Joined:
    Dec 22, 2004
    Location:
    Chicago, Illinois
    #17
    Plus one on this. Your exhaust is most likely loose. It's not serious.
     
  18. leishan macrumors 6502

    Joined:
    Jan 29, 2005
    #18
    It sounds like loose heat shield. Not too hard of a fix.
     
  19. ToddW macrumors 6502a

    Joined:
    Feb 26, 2004
    #19
    heat shield or exhaust is the likely culprit. find where the noise is coming from and if you don't want to fix it yourself, next time you go to get an oil change slip the guy a 5 to tight that up while he is under there.
     
  20. S Brake macrumors regular

    Joined:
    Jun 3, 2008
    Location:
    Utah
    #20
    The heat shield used to rattle on my old Toyota truck, then it just came off one day while driving and the rattling went away. The mechanic said not to worry about it though.
     
  21. ayeying macrumors 601

    ayeying

    Joined:
    Dec 5, 2007
    Location:
    Yay Area, CA
    #21
    If you hear it, most likely heatshield.

    If you feel it, could be clogged/clogging Idle Air Control Valve.
     

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