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help identifying noise

Discussion in 'Freightliner Forum' started by mgrantes, May 13, 2015.

Page 1 of 3
  1. May 13, 2015 #1
    mgrantes

    mgrantes Light Load Member

    111
    30
    Apr 26, 2013
    0
    2006 Columbia S60 odm:765k
    I need help identifying a noise. When I turn my key to the acc position I can hear what sounds like a whining sound coming from what sounds like the front of the engine (could it be air escaping somewhere?). I don't think that it has anything to do with any belt driven components seeing as how the engine isn't running at this point. I also want to say that it's always been there, only now it was noticeably louder when I had my hood open (doing a pretrip). Any ideas? Thanks
     
    mgrantes, May 13, 2015
    mgrantes, May 13, 2015
    #1
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  3. May 13, 2015 #2
    icsheeple

    icsheeple Trailing the Herd

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    Kansas City, KS
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    Probably your fuel pump.
     
    icsheeple, May 13, 2015
    icsheeple, May 13, 2015
    #2
  4. May 13, 2015 #3
    315wheelbase

    315wheelbase Heavy Load Member

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    Oct 26, 2014
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    does the noise increase when you rev the engine? or when you go faster??

    Not enough info..
     
    315wheelbase, May 13, 2015
    315wheelbase, May 13, 2015
    #3
  5. May 14, 2015 #4
    mgrantes

    mgrantes Light Load Member

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    Apr 26, 2013
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    315, that's hard to determine. My engine is pretty loud when running. The noise I'm describing gets drowned out.
     
    mgrantes, May 14, 2015
    mgrantes, May 14, 2015
    #4
  7. May 14, 2015 #5
    taxihacker66

    taxihacker66 Road Train Member

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    Concrete jungle.
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    I agree with icsheeple if the engine is not running then the noise is probably the fuel pump.
     
    taxihacker66, May 14, 2015
    taxihacker66, May 14, 2015
    #5
  8. May 14, 2015 #6
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,780
    1,726
    Jun 14, 2009
    romulus,mi
    0
    air supply line to fan clutch (purple 1/4 inch)has small hole in it.
     
    QUALITYTRUCK, May 14, 2015
    QUALITYTRUCK, May 14, 2015
    #6
    25(2)+2 Thanks this.
  9. May 14, 2015 #7
    Skate-Board

    Skate-Board Road Train Member

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    Merrimack, NH
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    I agree with @QUALITYTRUCK. Probably air line to clutch fan.
     
    Skate-Board, May 14, 2015
    Skate-Board, May 14, 2015
    #7
  10. May 14, 2015 #8
    mgrantes

    mgrantes Light Load Member

    111
    30
    Apr 26, 2013
    0
    Quick question, if it was the air line to the fan clutch wouldn't I hear air escaping regardless if I had the key on to acc position? The noise stops as soon as I remove my key (off position)
     
    mgrantes, May 14, 2015
    mgrantes, May 14, 2015
    #8
  11. May 14, 2015 #9
    Skate-Board

    Skate-Board Road Train Member

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    Merrimack, NH
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    No, when you turn the key on it activates an electric solenoid
     
    Skate-Board, May 14, 2015
    Skate-Board, May 14, 2015
    #9
    mgrantes and icsheeple Thank this.
  12. May 14, 2015 #10
    GrapeApe

    GrapeApe Road Train Member

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    Jan 7, 2013
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    It is not the fuel pump on an S60, they are mechanical. If it were an ISX, I'd agree that it was the fuel pump, but it's not. I'm leaning toward an air leak at the fan hub. Turn the key on and when you hear the noise, unplug the fan solenoid. You'll hear a quick burst of air that will engage the fan. If the noise stops after that, you have a leak in the line or fan hub.

    If the fan hub itself is leaking, pull the belt and see if there is any bearing play and that it spins freely and smoothly. Often a leak is caused by bearings overheating when they start to fail, which damages the seals. You do not want to chance the fan going into your radiator, so check it ASAP.
     
    GrapeApe, May 14, 2015
    GrapeApe, May 14, 2015
    #10
    mgrantes Thanks this.
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