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Thread: Car not heating up enough

  1. #1
    Join Date
    Feb 2004
    Posts
    137

    Default Car not heating up enough

    Hey everyone,
    I have a problem that I didn't see addressed in any thread I could find so far (probably because I didnt know how to phrase it). Anyway, out here in the MA cold, my car doesnt seem to want to heat up beyond the 1/4 thermostat mark when I am running the heater. If I leave the heater off, it will go right up to the half mark and stay pegged there. If I turn on the heat then, the needle stays put. But if I turn on the heat when the car starts, the engine and the air coming from the vents never gets very warm. I dont imagine this is a huge issue, although it is tough when it is like 20 degrees out and I am freezing inside my car. Thoughts? Thanks!

    Brian

  2. #2
    Join Date
    Oct 2005
    Location
    Roswell New Mexico
    Posts
    288

    Default

    get a new thermostat for the M50

    bilstin HDs, eiback prokit, K&N instert, DEPO fogs, sound system, zimmerman rotors, metal master

  3. #3
    Join Date
    Jul 2006
    Location
    Houston, Tx
    Posts
    592

    Default

    Yeah, sounds like the thermostat. They're HUGE and the spring is massive. They usually break on the body where the where the tangs meet the flange. It's probably jacked open from the break. Cheap and easy fix.

    Don't forget to pull the bleeder screw from the radiator when you refill the coolant


    "Scarlet" `97 540/6 with sleepy mods.
    "Box Car" '87 535isA - Old School Charm, new school Flair

  4. #4
    Join Date
    Oct 2006
    Location
    So. California, USA
    Posts
    308

    Default

    Thermostat on M50 breaks often. I have to replace mine again. Just ordered one for US$19. Last one lasted only 2-3 years.
    (SOLD) 92 525ia M50 | NGK plug | JVC AR560 | EAT chip | California


  5. #5
    Join Date
    Feb 2004
    Posts
    137

    Default

    Awesome, I'll give that a whirl and let you know what happens. Thanks so much guys!

  6. #6

    Default

    There are several mechanical flaps in the heating system, which is what the knobs and levers move. One or more of the flaps may have become jammed or disconnected.
    I LOVE BC CANADA

  7. #7
    Join Date
    Nov 2006
    Location
    Mid-Atlantic, USA
    Posts
    711

    Default

    Might want to consider having a new thermostat housing on hand since the plastic doesn't like being handled. Mine has the metal replacement but I'm not sure where to get those these days.

  8. #8
    Join Date
    Dec 2003
    Location
    Minneapolis, MN
    Posts
    574

    Default

    Make sure you:
    1. Get the right thermostat for your climate. ---I got the one for warmer climates and now, on very cold days here, the engine temp will actually drop while idleing.
    2. Don't over torque the bolts on the thermostat housing. --if you do, the gasket will squish and you'll get a coolant leak..


    1995 525i 5-Speed 201,000mi

  9. #9
    Join Date
    Sep 2005
    Location
    Central Coast, CA
    Posts
    657

    Default

    Quote Originally Posted by Dr. evil View Post
    get a new thermostat for the M50
    Agree!
    http://www.bimmernut.com/forum/image.php?type=sigpic&userid=3314&dateline=1239168  877

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