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why is my m42 still over heating?

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    #31
    ok so heres the deal had the heat working car ran great then parked it went to drive it and heat stopped working shortly into driveing and couple miles later its doing the same thing and im freezing my ass off in this 58 new england weather

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      #32
      Originally posted by mo diesil View Post
      ok so heres the deal had the heat working car ran great then parked it went to drive it and heat stopped working shortly into driveing and couple miles later its doing the same thing and im freezing my ass off in this 5* new england weather

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        #33
        so i had the heat working drove the can was fine heat working really well parked went to drive it a couple hours later heat still work then stopped working then a couple miles down the its doing the same thing no heat and im freezing my ass off in this 5 * new england weather

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          #34
          maybe im getting a air lock this might be a dumb question but when you guys bleed the system
          is the car on or off?
          rasie the front?
          heater on hot and fan on high?
          let me know please im getting very aggravated

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            #35
            heater on hot and fan on high, i didn't raise the front and didn't have issues. and i bled it with the car on if i remember right and had no issues...

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              #36
              I've been air locked.

              I generally follow the same instructions as these guys, but I reverse fill the upper radiator hose. I fill the upper hose with coolant (which fills the head directly) until the hose itself is almost full, then attach the hose to the radiator. Then I'll run the car, and "massage" the lower radiator hose. You should be able to hear the coolant squirting from the upper hose into the radiator. The lower hose should remain cool until the thermostat opens and circulates the hot coolant.. then you should check the radiator and fill the reservoir.

              I've done this like 3 times in the last 2 months trying to find a coolant leak, no problems. It was coming from my thermostat housing.
              My 1991 318is Progression Thread

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                #37
                also have a new theory what if the v belt for the alt / water pump is on to lose or tight? would this cause similar problems how much slack is there on your guy's belts?

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