W202 C280 Whining noise

Discussion in 'Engine' started by PBF, Apr 15, 2014.

  1. PBF

    PBF Member

    Messages:
    58
    Joined:
    Dec 6, 2013
    Location:
    West London
    Car:
    Mercedes ML320 2002
    Hi, i am looking for some advice,when i first start my car up there is a whining noise coming from the front of the car,it quietens down a little when warmer.
    I have changed the ina Deflection Pulley Drive Belt Tensioner also the drive belt with a ContiTech Drive Belt,but alas this had made no difference, any idea what i should change or test next.

    Thanks Paul
     
  2. Chalpkin

    Chalpkin Hardcore MB Enthusiast

    Messages:
    267
    Joined:
    Oct 15, 2012
    Location:
    Surrey
    Car:
    2001 C320 Petrol Avantgarde
    Hi PBF,
    I find slowing down when the SWMBO asks stops most annoying whines
    ;-)
     
  3. OP
    OP
    PBF

    PBF Member

    Messages:
    58
    Joined:
    Dec 6, 2013
    Location:
    West London
    Car:
    Mercedes ML320 2002
    Hi I've taken a short video of the whining noise any help would be appreciated. Here's the link:

    MVI 2206 - YouTube

    Thanks Paul
     
  4. chubbs111

    chubbs111 Hardcore MB Enthusiast

    Messages:
    493
    Joined:
    Apr 8, 2011
    Location:
    ledbury
    Car:
    clk270cdi
    take off the aux belt and run it again if the noise dissapears its either alternator or belt idler pulley i suspect its the alternator try spraying some wd40 into the alternator
     
    1 person likes this.
  5. rorf

    rorf Hardcore MB Enthusiast

    Messages:
    424
    Joined:
    Jul 23, 2011
    Location:
    Cape Town, South Africa
    Car:
    2000 SL320 v6, 2001 CLK320
    Yip, could be alternator or water pump, power steering pump, aircon and even the timing chain:crazy:
     
  6. Vlad

    Vlad Hardcore MB Enthusiast

    Messages:
    2,391
    Joined:
    May 30, 2003
    Location:
    Reading, England
    Car:
    Various Mercs come and go
    That's just the typical alternator whine that all Mercs of this age make on start up, which then goes once the engine comes off choke and has topped up the battery and the load on the alternator decreases.
     
  7. aka$h

    aka$h Hardcore MB Enthusiast

    Messages:
    3,309
    Joined:
    Jan 30, 2004
    Location:
    London
    Car:
    Anything with a 3 Pointed Star!
    Sounds like a noisy secondary air pump
     
  8. OP
    OP
    PBF

    PBF Member

    Messages:
    58
    Joined:
    Dec 6, 2013
    Location:
    West London
    Car:
    Mercedes ML320 2002
    Thanks for the replies.
    I have taken the drive /fan belt off the car as suggested and started the car up
    but this has made no difference to the whining noise,
    any information would be appreciated.

    Thanks Paul
     
  9. aka$h

    aka$h Hardcore MB Enthusiast

    Messages:
    3,309
    Joined:
    Jan 30, 2004
    Location:
    London
    Car:
    Anything with a 3 Pointed Star!
    The air pump is electronic, if you pm me your vin I can check if your car has one
     
  10. OP
    OP
    PBF

    PBF Member

    Messages:
    58
    Joined:
    Dec 6, 2013
    Location:
    West London
    Car:
    Mercedes ML320 2002
    Hi, i cant pm yet as dont have 30 posts,
    my vin is WDB2020892F902302,
    Thanks
     
  11. tonyc280

    tonyc280 Hardcore MB Enthusiast

    Messages:
    945
    Joined:
    May 22, 2010
    Location:
    Leicestershire
    Car:
    1997 C280 V6 Elegance Auto Facelift. 1992 Kawasaki ZZR1100 C3
    Sounds like Alternator bearing to me!!! Cheers, tony C
     

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