W202 losing coolant

Discussion in 'Engine' started by VioAmethyst, Aug 3, 2017.

  1. VioAmethyst

    VioAmethyst New Member

    Messages:
    5
    Joined:
    Jun 19, 2017
    Car:
    1996 C200 Sport
    Hello! Help!

    I've got a 2L auto w202, and it's losing coolant. I don't see any leaks, but I go through around 5 litres a week, and there's oil in the radiator as well. However I don't see any coolant in the oil, and there's no white smoke which leads me to hope that it isn't the CHG. I've heard that it might be the oil cooler gasket instead, which sounds a lot less financially painful. Can anyone confirm, and if so point me to where I can get a new gasket as there seem to be a few different options and I'm not sure which one I need?

    Cheers :rolleyes:
     
  2. grober

    grober MB Club Veteran

    Messages:
    27,506
    Joined:
    Jun 22, 2003
    Location:
    Perth, Scotland
    Car:
    W204 C200CDI Estate
    Didn't know the C200 W202 with the M111 petrol engine had an oil cooler? Most likely cause is your CYLINDER HEAD GASKET I'm afraid to say. Take out the spark plugs and look down the spark plug hole. If the top of any piston looks wet/black/oily compared to the others and the corresponding spark plug looks black and fouled you have your answer.
     
  3. rorf

    rorf Hardcore MB Enthusiast

    Messages:
    424
    Joined:
    Jul 23, 2011
    Location:
    Cape Town, South Africa
    Car:
    2000 SL320 v6, 2001 CLK320
    5 litres a week is a lot - you might even have a leak on the transmission oil cooler in the radiator. The only way to identify if it is the head gasket is to do a leak down test.
     
  4. OP
    OP
    VioAmethyst

    VioAmethyst New Member

    Messages:
    5
    Joined:
    Jun 19, 2017
    Car:
    1996 C200 Sport
    Damn. Lesson learned, if you're looking at a car you want to buy and you find a bottle of water in the boot, don't buy the car :(
     
  5. 190

    190 Hardcore MB Enthusiast

    Messages:
    2,972
    Joined:
    Mar 4, 2015
    Location:
    Cheshire
    Car:
    2009 W204 C180K
    5L a week is an awful lot to be loosing into the combustion chambers so I hope it's something else like a leaking water pump gland. But if the head gasket is the problem it will show visually on one or more of the plugs. On my M102 engine it wasn't too obviously oily just an ugly build up of deposits on the rear plug.
     

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