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Overheating Issue on the Beater

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    #1

    Overheating Issue on the Beater

    ok, I have a 86 325 5speed beater that I am fixing up to drive around for awhile while I work on my white e30



    Here is the issue, the temperture will keep slowly creeping up until obviously the coolant starts to steam.


    The car blew the heater control valve while it was driving, and lost all coolant, however it was shut off right when it popped by my friend who I got the car from.

    100 miles prior it recieved a new water pump, which is working fine and not making any bad noises. Today I determined the fan clutch was shot, so I replaced that, however its still heating up.

    I did cap off the heater core, but simply connecting the two lines that go into the heater core together, so coolant is flowing like it should from what I can tell. I did use a 90 degree connecter to hook the two coolant lines together, however I can't see that being an issue as the heater core must be more restrictive then the 90. Tommorrow I am replacing the thermostat as I don't think its opening all the way. but other then that any real ideas?
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    #2
    the coolant system wasnt bled properly. That is exactly what happened to my parents 735 when I didnt bleed it before I took it for a drive. Got halfway up the street, and it was already at full hot.

    NASA MidSouth TT Director / GTS2 #018
    Mods: Coastal PS Fluid, 10w40 Oil
    Future Mods: Bosch Micro-Edge Wiper Blades, Painter's Tape, Spark Plugs, Freezer for Nutty Buddys, Adam Nitti CD's

    Comment

      #3
      Yea did you let all the air out of the system? I know it sounds dumb but sometimes we forget.

      Comment

        #4
        Other then leaving the coolant cap off and letting it idle?

        that is how I was shown to bleed the air, any other methods?

        Comment

          #5
          on the thermostat housing there should be a bleed screw. When the car is running, turn the heater to full hot, open the bleed screw until no more bubbles come out.
          Check the bentley if you have one, it describes the process.

          NASA MidSouth TT Director / GTS2 #018
          Mods: Coastal PS Fluid, 10w40 Oil
          Future Mods: Bosch Micro-Edge Wiper Blades, Painter's Tape, Spark Plugs, Freezer for Nutty Buddys, Adam Nitti CD's

          Comment

            #6
            Originally posted by Skafrog
            on the thermostat housing there should be a bleed screw. When the car is running, turn the heater to full hot, open the bleed screw until no more bubbles come out.
            Check the bentley if you have one, it describes the process.

            Remember I have no heater, so I will just remove that part, alright I will do that, never had to bleed the system fully on my other cars

            Comment

              #7
              The procedure is best done with the car parked on an incline or with the front of the car up on ramps so that all of the air bubbles find thier way to the front of the engine where the thermostat + bleed screw are located.

              Comment

                #8
                Well there was no air in the system, so I checked the therostat and it was stuck shut...oops


                so I replaced that, filled it back up, bled the air, and she runs right in the middle like it should


                cool beans, now I have 2 driveable e30's :p

                Comment

                  #9
                  Originally posted by James Crivellone
                  cool beans, now I have 2 driveable e30's :p
                  And this little piddy had none...

                  Don't worry, mine will come...

                  Comment

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