engine noise when idling
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2008-2013 Cadillac CTS Performance Mods Discussion, engine noise when idling in Cadillac CTS Second Generation Forum - 2008-2013; Greetings The 2011 CTS 3.6 is new to me. I noticed when the car is idling there is what sounds ...
  1. #1
    BRP1616 is offline Cadillac Owners Member
    Automobile(s): 2011 CTS AWD Sedan performance
    Join Date
    May 2014
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    Sunshine Coast BC
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    engine noise when idling

    Greetings
    The 2011 CTS 3.6 is new to me. I noticed when the car is idling there is what sounds like a belt noise coming from the front of the engine. The CTS has 40,000kms on it. Are the serpentine belts on the 3.6 noted to get noisy?

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  3. #2
    cwest24 is offline Cadillac Owners Member
    Join Date
    Apr 2013
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    I'm having the same problem/noise on my 2008 CTS 3.6. Let me know if you figure it out.

  4. #3
    SC2150's Avatar
    SC2150 is offline Cadillac Owners Connoisseur
    Automobile(s): CTS
    Join Date
    Feb 2012
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    Palmetto, FL
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    1,632

    Re: engine noise when idling

    tensioner and idler pulley would be where I would look first.....remove the belt and turn the pulley feeling for a rough bearing/race. If not silk smooth, then replace. If not those, water pump would be next and then AC compressor.
    RX Performance Products/RevXtreme.com 941-721-1826

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