1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Help 1999 m112 w202 c240 cooling problems

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by OldSchool-Meets-New, Aug 13, 2019.

  1. OldSchool-Meets-New

    OldSchool-Meets-New Member

    Messages:
    12
    Likes Received:
    5
    Joined:
    Jul 6, 2019
    Your Mercedes:
    c240 1991 2.4 v6
    Hi, I'm new to the forums but am in need of some advice due to my Merc not wanting to cool itself...
    I recently changed the thermostat and did a coolant flush as it's on 96k with the hopes that the thermostat would fix my problem.. The fan still doesn't work even with the AC on full (Only cold air comes out if the vents).
    I'm in a sticky situation as my car hasn't been used for a couple of years so doesn't have an MOT or tax.
    Does anyone have any advice on what this issue might be?
    Thanks in advance


    Sent from my CLT-L29 using Tapatalk
     
  2. LostKiwi

    LostKiwi Senior Member

    Messages:
    20,436
    Likes Received:
    9,994
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    A bit more detail on the symptoms might be useful?
    For example does it lose water, are the hoses rock hard when running, do you get bubbles in the header tank?
     
    Jim2 likes this.
  3. OP
    OldSchool-Meets-New

    OldSchool-Meets-New Member

    Messages:
    12
    Likes Received:
    5
    Joined:
    Jul 6, 2019
    Your Mercedes:
    c240 1991 2.4 v6
    I've had a few issues trying to reply but none of the symptoms you've mentioned are evident.. I've got a hunch that is the fan control module, so I need to source one reliably.

    I have since noticed that my w202 keeps draining the battery with the alarm/hazard lights... :'( any advice on that?

    Sent from my SM-G950F using Tapatalk
     
  4. grahamcol

    grahamcol Senior Member

    Messages:
    1,278
    Likes Received:
    197
    Joined:
    Jan 12, 2009
    Location:
    West Midlands
    Your Mercedes:
    2001 SLK230, 2000 C280 V6
    The alarms go bad and you could just disconnect the alarm siren. I believe it is situated behind the nearside front wheel arch liner.
    Good luck with this and the overheating.
     
    om613 likes this.
  5. om613

    om613 Senior Member

    Messages:
    1,412
    Likes Received:
    298
    Joined:
    Aug 29, 2015
    Location:
    london
    Your Mercedes:
    S202 C250TD, S123 240TD
    you could replace / clean out the duo-valve, although that's more for non-cabin heating, not engine overheating..
     
  6. LostKiwi

    LostKiwi Senior Member

    Messages:
    20,436
    Likes Received:
    9,994
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Has it ever had K-Seal or similar in the cooling system? That really screws things up.
     
  7. OP
    OldSchool-Meets-New

    OldSchool-Meets-New Member

    Messages:
    12
    Likes Received:
    5
    Joined:
    Jul 6, 2019
    Your Mercedes:
    c240 1991 2.4 v6
    My main concern is that I'm going to lose out on a key saftey feature but also that the hazards keep blinking which is the ultimate issue for the battery drain.
    I hope it isnt a problem with the loom

    I'm thinking about sending it off to a merc specialist in tonbridge. Not looking forward to the repair bill though :'(

    Sent from my SM-G950F using Tapatalk
     
  8. LostKiwi

    LostKiwi Senior Member

    Messages:
    20,436
    Likes Received:
    9,994
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    By 99 the loom issues were pretty much sorted. It was 93-95/6 the loom issues were rife.
     
  9. OP
    OldSchool-Meets-New

    OldSchool-Meets-New Member

    Messages:
    12
    Likes Received:
    5
    Joined:
    Jul 6, 2019
    Your Mercedes:
    c240 1991 2.4 v6
    So, its been a long time but i thought id update anyone as to my situation.
    The cooling problem was resolved by a thermostat and coolant temp sensor replacement aswell as a full system flush.

    Secondly
    My alarm keeps activating without noise because i have a bad siren. The batteries corrode and leak onto the sirens chipboard and in turn causes it to fail.

    Both were relatively easy fixes and i am now on the road.... finally!

    Still need to do some work to the body but shes a beauty!

    Thanks for your replies (y)

    Sent from my SM-A705FN using Tapatalk
     
  10. OP
    OldSchool-Meets-New

    OldSchool-Meets-New Member

    Messages:
    12
    Likes Received:
    5
    Joined:
    Jul 6, 2019
    Your Mercedes:
    c240 1991 2.4 v6
    .... she needs a new badge and grill but i think my resprayed grill is good for a temp cover up, what do you think?[​IMG][​IMG]

    Sent from my SM-A705FN using Tapatalk
     

Share This Page