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W211 E220 CDi - Running Temperature

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by MLAM, Feb 12, 2013.

  1. MLAM

    MLAM Senior Member

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    Hi all,

    I was out in the old mans E220 CDi (170 BHP) today and I was looking at the temperature gauge, despite a good 30 min drive it didn't go above 80 degree's, it sat about 1 or 2 bars below.

    Is this too cool for this engine or given the cold temps we have had lately it's about right?

    I then drove the car on the way back an gave it some beans and it rested on 80 degree's a bit but settled back down to about 2 bars below.

    Also another note, how should these things shift when giving it some beans? the gearbox and engine do seem quite responsive and you feel it drop a gear or 2, is this the norm?

    Any advice appreciated, thanks
     
  2. rpe2

    rpe2 Senior Member

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    A couple of bars means about 60c

    Probably needs a new thermostat - quite common.
     
  3. television

    television Always remembered RIP

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    It is failing as above,, it does need to be in the mid 80's or more
     
  4. OP
    MLAM

    MLAM Senior Member

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    Thanks for the advice guys.

    Do you guys tend to go for Genuine parts or get pattern part from ECP or GSF?
     
  5. turbopete

    turbopete Senior Member

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    i replaced mine about a year ago with a genuine one and, from memory it cost about £44 for my C220 CDi
     
  6. television

    television Always remembered RIP

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    If you would like the worksheet, just ask
     
  7. OP
    MLAM

    MLAM Senior Member

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    Thank you all,

    Does anyone have the part number for the Thermostat?
     
  8. Troon

    Troon Active Senior Members

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    For my car, it's A6462000015, which includes the gasket. If you post your VIN we can check EPC for you.
     
    Last edited: Feb 14, 2013
  9. Troon

    Troon Active Senior Members

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    I replaced mine yesterday -- car was hovering between 70 and 80 deg C on long runs. With the new 'stat, it runs at a steady 90, and first indications are that economy is improved.

    Replacement is fairly easy on the OM646 -- you need an E10 Torx socket and a 6" extension bar, both available from Halfords.
     
  10. OP
    MLAM

    MLAM Senior Member

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    Hi Troon,

    The VIN is WDB2110082B059999

    I spoke to a specialist today and I was advised they should not run hotter than 90? :S

    I'll keep an eye on it, I take it you bought yours from a Dealer?
     
  11. Troon

    Troon Active Senior Members

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    That's the correct part number then. The thermostat should keep the temperature at 90-ish. Mine, like yours, was running a couple of bars below 80.

    I bought it from Inchcape's online store.
     
  12. OP
    MLAM

    MLAM Senior Member

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    Thanks for your reply Troon.

    Given the cold temps in the winter should the engine reach 90 Degree's regardless albeit a bit longer time wise?

    How many bars above 80 does it sit now?
     
  13. Troon

    Troon Active Senior Members

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    Two bars above 80 and two below 100, which I assume to be 90°C. It got there in nine minutes from start this morning, driving gently in 1.5°C ambient; and did not move off that position throughout my 50-mile commute.

    I have half my radiator blanked off, but I'd still expect it to reach 90°C.
     
  14. st4

    st4 Banned

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    It should run at 90c regardless of temperature.
     

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