Engine Drivetrain 2nd Gen S Most liked posts in thread: Countryman Coolant Temp Sensor?

  1. eMINIparts

    eMINIparts Well-Known Member
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    #4 eMINIparts, Feb 18, 2015
    MINI did some coolant temp sensor location changes. You have the temp sensor that is in the metal elbow housing, I have started to see these come back with slight leaks. MINI does not offer an oring for that sensor. I have seen just the oring replaced with no problems to follow. If you are under factory warranty go back to your local dealer and have that replaced under warranty.
     
  2. eMINIparts

    eMINIparts Well-Known Member
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    #6 eMINIparts, Feb 18, 2015
    They have done many changes on that temp sensor. Take that sensor out, bring it with you to the parts house and match that o-ring up. MINI does not offer that o-ring by it's self.
     
  3. eMINIparts

    eMINIparts Well-Known Member
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    #8 eMINIparts, Mar 9, 2015
    Squeese the tabs and pull up.
     
  4. BLacher

    BLacher New Member

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    #11 BLacher, Mar 12, 2015
    Excellent info, worked brilliantly.
    I wanted to mention that I found an o-ring that would work. I took OEM to Advance Auto Parts, they didn't have one in the o-ring index boxes. However, there was one in the 'HELP' card p/n 80000. When you buy the card with many different sizes, the correct one is fairly obvious. It is black rubber, as opposed to the green that came off of sensor, but so far (two days now) it is working great. No more leak. Approx size is 9mm ID x 13mm OD.
     
  5. CHKMINI

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    #13 CHKMINI, Oct 22, 2015
    I replaced 2 plastic thermostat housings (jarvic heart) on or 11 CMS. The leak was hard to find but both times it solved the issue.
     
  6. jeffster06

    jeffster06 Active Member

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    #2 jeffster06, Feb 17, 2015
    bump, no one has any info on this?
     
  7. Mr. Jim

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    #3 Mr. Jim, Feb 18, 2015
    Haven't heard anything about it, sorry.
     
  8. jeffster06

    jeffster06 Active Member

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    #5 jeffster06, Feb 18, 2015
    From my searches I can't even find the sensor. I am out of the warranty on mileage, I plan on trying to change the oring this weekend and will watch it from there.

    So far trying to find detailed info on this has been a pain. I guess the part I am stuck on is I was told my car had the coolant sensor recall done on it, my understanding is the sensor on the metal elbow is the recall and the thermostat housing with the sensor is original problem design, but all I find when I search are parts for the thermostat housing with the sensor.... did they do a recall then revamp the housing after the fact?
     
  9. BLacher

    BLacher New Member

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    #7 BLacher, Mar 8, 2015
    How does the sensor come out, is it just pressure fit with o-ring? Do I just pull it out?
     
  10. BLacher

    BLacher New Member

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    #9 BLacher, Mar 10, 2015
    Thank you, but I am feeling a little dense (and not at vehicle right now). What tabs please? Are they in the little windows on the sensor housing? or on the sensor above the housing?
    Thanks.
     
  11. eMINIparts

    eMINIparts Well-Known Member
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    #10 eMINIparts, Mar 10, 2015
    Unplug the harness from the sensor. ( there should be a squeese tab for that too) when you have that off you can see the sensor , it has a tab on each side, squeese them and pull up. Its gonna be corroded and gonna be a bit of a pain to pull out.

    Hope that this info is helpful.
     
  12. jeffster06

    jeffster06 Active Member

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    #12 jeffster06, Oct 22, 2015
    bringing this back to life, I changed the oring back when I created this post the sensor is still looking pretty clean. I have developed a new coolant leak recently, oddly enough I saw a puddle in the garage about a week after topping off the coolant, I should also add I changed my oil at this time and saw no signs of a coolant leak. From looking under the car its hard to tell where the leak is, it appears to be rolling off the bell housing should I assume the thermostat is leaking now? I removed the intake hose and pushed stuff out of the way and I don't see any signs of leaking on the top side of the housing (what little I could see).
     
  13. jeffster06

    jeffster06 Active Member

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    #14 jeffster06, Oct 22, 2015
    Guess i'll dig deeper and see if I can find a trace, of course now that I have seen the leak and the residue I can't catch it in the act, which would most likely narrow it down.
     
  14. jeffster06

    jeffster06 Active Member

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    #15 jeffster06, Oct 22, 2015
    Just checked it again, no drips.... looked at the sensor and its wet guess my new oring has failed already. ill be changing that again, at least that is a quick fix. maybe ill find a better oring to use this time.
     
  15. BLacher

    BLacher New Member

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    #16 BLacher, Oct 22, 2015
    Jeff, I just recently changed my oil as well. I did notice that when I had the coolant tank moved out of the way- some coolant leaked (small drip) from the hose at the bottom of the tank. It is just a push on connection, so I made sure to push it all the way on when re-installing tank. HTH
     
  16. jeffster06

    jeffster06 Active Member

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    #17 jeffster06, Oct 28, 2015
    Definitely was the o-ring again, I swapped it out with one I had laying around, haven't checked it recently but a day later it was still dry and the coolant level hadn't changed. Maybe this is why MINI changed the sensor location.