2nd Gen R56 Cooper S Most liked posts in thread: Strange sound coming from engine bay?

  1. Dave.0

    Dave.0 Helix & RMW Powered
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    #2 Dave.0, Jul 1, 2014
    It sounds a little like you A/C running but not engaged if that makes sense.

    Please list some info about your car for others. Year, Model, Mileage ect.

    I have no idea but now I am dizzy. :D
     
  2. Systemlord

    Systemlord New Member

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    #7 Systemlord, Jul 2, 2014
    Last edited: Jul 2, 2014
    Well Dave you were right, the sound is coming from the area of all of the pulleys. I heard that same harmonic sound but the interesting part is it changed tone a bit with the AC on, so now we know that it's either the AC pulley, friction wheel, alternator or the water pump. So if it turns out to be the AC what's involved in fixing it to where the sound is gone completely? Is this something most extended warranties would cover? I have a full 6-year powertrain warranty that covers any defects such as the oil feed line.


    On another note what do you guys think of my spark plug colors? These plugs I bought from Way, I have 3k miles on them.
     

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  3. Zapski

    Zapski Well-Known Member

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    #3 Zapski, Jul 1, 2014
    I've no idea, but I'm happy to give the thread a bump!
     
  4. Systemlord

    Systemlord New Member

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    #4 Systemlord, Jul 1, 2014
    Oh sorry, I have a 2007 MCS (just turn over to 54k miles) and haven't turned on the AC for a few months, you just gave me an idea Dave, next time I hear that noise I'm going to turn on my AC and see if it gets louder, quieter or nothing at all.


     
  5. MCS02

    MCS02 Moderator
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    #5 MCS02, Jul 2, 2014
    It sounds like ether a loose heat shield or exhaust. I have had exhaust parts make this kind of noise till they heat up. Once they heat up just a little the metal expands and it gets quiet. Or it could be a lose bracket.
    In the morning after the car has sat over night and it's still cool check to make sure every thing is tight. Make sure to get under the car and check the exhaust.
     
  6. Apok

    Apok New Member

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    #6 Apok, Jul 2, 2014
    If it is the heatshield, there is some sort of recall on it. The dealership replaced mine late last year before my warranty run out. Might wanna check with your local dealership.

    Heatshield still sucks, and I noticed recently that the cowling above the turbo/heat shield has started to warp. :(