temperature rising and it's freezing out there ...

Discussion in 'Parts, Maintenance & Servicing' started by Braincrank, Dec 29, 2016.

  1. Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Just came down the M1 and there was some traffic were the speed was about 30 mph and suddenly the temperature went up .... Once the traffic eased and I was back to cruising speed the temperature leveled out at just just over 80 which is normal for my car.
    My guess is thermostat ?!
    Also, the warm air outlets in the car blow hot and suddenly go cold. When I switch the heating off and after a few minutes on again it blows hot for a while and then cold on pax side but driver's side is lukewarm to warm ....
    Any suggestions what else it could be are much appreciated !!
     
  2. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    The heating issue is probably the duo valve ?? Or is there another switch that could have a gremlin ?
     
  3. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Could it be the little pump that sits between the water pump and duo valve ?
     
  4. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

    Messages:
    1,600
    Joined:
    Oct 1, 2011
    Location:
    Birmingham
    Car:
    2x c43 Amg clio 172 turbo 314bhp
    I'd be looking wat thermostat first, easy job and cheap enough in your car, duo valv won't effect engine temp only heating in the cabin.
     
  5. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Right, so I fitted a new thermostat and now the engine temperature only stays a hair width below 80° . Can't remember the engine ever running at that temperature. It's normally at the next line above 80° .
    Did they flog me the wrong thermostat? Is it bad to run the engine a bit cooler?
     
  6. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    I wouldn't have thought that the duo valve is messing about since I only put a secondhand one (in good condition) in not long ago. So now I think it might be the little pump that sits between the water pump and duo valve. It's still the original one so it's done 27 years ....
    Does anyone know if it's easy to take apart and clean or should I rather try and locate another one ?
     
  7. AMGeed

    AMGeed MB Club Veteran

    Messages:
    11,513
    Joined:
    Nov 1, 2008
    Location:
    Bournemouth/Poole Dorset
    Car:
    2004 W211 E55K ///AMG
    Should be running at around 87c

    Did you get the thermostat from the dealer or is it aftermarket?
     
  8. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    GSF-car parts
    Two blokes double checked the ref no.
    But then two can be double wrong ...
     
  9. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Is it correct that the engine uses more fuel when running cool ?
     
  10. moonloops

    moonloops MB Club Veteran

    Messages:
    5,179
    Joined:
    Oct 8, 2009
    Location:
    :Location : Location
    Car:
    W204 C350 CDI AMG Sport
    Yep
     
  11. WDB124066

    WDB124066 MB Club Veteran

    Messages:
    6,176
    Joined:
    Apr 17, 2009
    Car:
    1996 E320 Sportline Cabriolet x 2
    Is this a W124...?
     
  12. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
  13. WDB124066

    WDB124066 MB Club Veteran

    Messages:
    6,176
    Joined:
    Apr 17, 2009
    Car:
    1996 E320 Sportline Cabriolet x 2
    1 person likes this.
  14. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

    Messages:
    1,600
    Joined:
    Oct 1, 2011
    Location:
    Birmingham
    Car:
    2x c43 Amg clio 172 turbo 314bhp
    Not just running cooler because the heater is on and it's colder outside?
     
  15. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    That's what I'm thinking at the mo.
    It's not quite the right environment to test it when it's freezing outside ....
     
  16. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Not the best quality pic but that's how it normally is .

    ForumRunner_20170105_092041.jpg

    That's how it was this earlier after a 5mile stop start city drive , must add that the missus had the blower on to keep the windscreen clear .

    ForumRunner_20170105_091917.jpg
     
  17. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Pics are the wrong way round ....
    The warmer temp is how it's used to be and the cooler one was from today ...
     
  18. ray_hennig

    ray_hennig Hardcore MB Enthusiast

    Messages:
    586
    Joined:
    Dec 1, 2008
    Location:
    France
    Car:
    MB 300CE-24 Sportline
    I would want my W124 to run at the higher of your 2 temperatures. Just under 90 C.

    RayH
     
  19. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    Yes, that's at which it always ran until I came down the M1 on 29.Dec and while in traffic doing 30mph the temperature went up although it the outside temperature was only round 5°C or thereabouts.
    Most peculiar ....
    The part number of the thermostat I got from GSF is 176ME001 and it states on the receipt it should be 87°C
    Maybe it is the cold weather that's mucking about with the reading but I thought the thermostats job is to keep the temperature at a steady level ....

    ForumRunner_20170105_213201.jpg
     
  20. OP
    OP
    Braincrank

    Braincrank Hardcore MB Enthusiast

    Messages:
    355
    Joined:
    Sep 12, 2012
    Location:
    West London
    Car:
    Mercedes 200E
    I had a new radiator fitted about 2 years ago .
     

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.