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Thermostat replacement

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by pikeface999, Oct 22, 2012.

  1. pikeface999

    pikeface999 Senior Member

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    Your Mercedes:
    C270 2002 Diesel & E270 2003
    My E270 has been suffering from low temperature 50-60 degrees. After reading several threads it was clear that I should replace the thermostat. I now have the thermostat and am going round a friends to replace it this evening. However when I stopped at a shop to pick up the oil filter removal tool while checking I have the correct one I noticed that the fan was turning while the engine was running and the temperature was only about 70 degrees. Does this mean that I really only needed a temp sensor or would you expect this ?
     
  2. huey

    huey Senior Member

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    Your Mercedes:
    W203 cdi 2004 Estate
    The fan will turn a bit with the engine running, was it spinning really fast and making a humming noise? The fan kicks in about 95.
     
    Last edited: Oct 22, 2012
  3. OP
    pikeface999

    pikeface999 Senior Member

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  4. S.Speed

    S.Speed Senior Member

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    I dont think my fan turns at all when the engine is running at the normal temp..
     
  5. huey

    huey Senior Member

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    Thanks Simon, you know this model better than I do:D mine turns but only slowly.
     
  6. OP
    pikeface999

    pikeface999 Senior Member

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    Mine turns slowly only when air con is on .

    Anyway thermostat is now changed and the car gets up to temperature.

    The replacement thermostat was not quite the same which caused a few problems.

    1 No thread at the front
    2 Temperature sensor was not a tight fit so had to use a second o ring.
    3 there was a pilot hole for pipe clamp but no thread so taped one

    Will give it a proper run tomorrow.
     
  7. television

    television Always remembered RIP

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    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    With the engine only getting to 70, the heater will will very poor as the weather gets colder
     
  8. OP
    pikeface999

    pikeface999 Senior Member

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    Your Mercedes:
    C270 2002 Diesel & E270 2003
    Excellent approx 90 degrees mid point on gauge.

    Are these common issues or was I unlucky

    1 No thread at the front
    2 Temperature sensor was not a tight fit so had to use a second o ring.
    3 there was a pilot hole for pipe clamp but no thread so taped one
     
  9. RichardCC

    RichardCC Senior Member

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    Your Mercedes:
    W210 E300TD 1998
    H'mm :( W210 E300 TD runs at just under 80 so I think a new thermostat is on my wish list, now that I've read this thread

    thanks ;)
     
  10. OP
    pikeface999

    pikeface999 Senior Member

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    Your Mercedes:
    C270 2002 Diesel & E270 2003
    So on a 60 mile run I manged to get 56 mpg at one point. Got stuck in traffic for 20mins and this reduced to 52mpg over the 120 miles.

    smoking
     
  11. S.Speed

    S.Speed Senior Member

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    Its normal for the pipe clamp not to be tapped..
    And yes its a fairly routine (about every 5 years) procedure to change the thermostat..
    Ive had 2 x C270 Cdi and have had to change the thermostat on both..
    My temp sensor didnt inspire confidence so I daubed a little Hylomar blue on it..
    Its never leaked anyway !!
     
  12. OP
    pikeface999

    pikeface999 Senior Member

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    Sorry for the late reply but thanks. Have away for a weeks holiday.

    Regards Jeremy
     

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