Engine running cool

Discussion in 'General Discussion' started by amb1947, Feb 29, 2016.

  1. amb1947

    amb1947 New Member

    Messages:
    12
    Joined:
    Mar 29, 2015
    Car:
    C220 Coupe
    Dear All, I am not a technical person. I have a 56 plate 220 diesel Coupe and the temperature gauge appears to be reading 20 degrees or so less than I remember. The car used to run at just over 80 and now appears to run at 60. Please advise?
     
  2. CCAALLVVIINN

    CCAALLVVIINN Hardcore MB Enthusiast

    Messages:
    1,704
    Joined:
    Mar 6, 2007
    Location:
    Sunny Devon
    Car:
    W124 cabriolet, W126 300SE, Land Rover 109 2.6
    Maybe thermostat failed, or could be just not getting up to temp in short journeys with heater on full in the cold weather
     
  3. OP
    OP
    amb1947

    amb1947 New Member

    Messages:
    12
    Joined:
    Mar 29, 2015
    Car:
    C220 Coupe
    Many thanks

    I have a longer journey tomorrow and will see how it performs

    Is it much of job to replace?

    Regards
     
  4. markjay

    markjay MB Club Veteran

    Messages:
    22,160
    Joined:
    Jun 24, 2008
    Location:
    London
    Car:
    W204 C180 Executive SE 2013 Automatic / COMAND NTG4.7 and Morel speakers fitted by www.comand.co.uk
    I replaced the thermostat on my petrol-engined C180K last week and it was very straightforward.

    I can't imagine the C220CDI will be significantly more difficult.

    The trick is to syphon out the coolant from the expansion bottle to avoid spill when removing the thermostat, then carefuly pouring it all back in once the new thermostat is in place.

    The original MB coolant is 15-Year long-life coolant and shouldn't really be topped-up with substitutes.
     
  5. OP
    OP
    amb1947

    amb1947 New Member

    Messages:
    12
    Joined:
    Mar 29, 2015
    Car:
    C220 Coupe
    Many thanks
     
  6. Stratman

    Stratman Hardcore MB Enthusiast

    Messages:
    4,516
    Joined:
    Jun 15, 2003
    Location:
    Sunbury
    Car:
    W203 C200 CDI '04Estate
    Be careful of the plastic fuel pipes near the thermostat, they can become brittle and may crack when being moved out of the way.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.