where does the coolant go?

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  • moatilliatta
    R3V OG
    • Feb 2005
    • 6121

    #16
    Heater core leak?

    I was up above it, Now I'm down in it ~ Entropy - A Build thread.
    @Zakspeed_US

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    • cheffy30
      E30 Enthusiast
      • Sep 2016
      • 1159

      #17
      Originally posted by moatilliatta
      Heater core leak?
      cabin is dry. heat blows hot. would have shown in pressure test... sent from hell using Tapatalk
      ~~~~~~~~~~~~~~~~~
      '90 325i sedan daily driven
      '85 325e coupe also a daily

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      • cheffy30
        E30 Enthusiast
        • Sep 2016
        • 1159

        #18
        Originally posted by roguetoaster
        I don't know about that, but you can reference "The Beast" for the recipe.
        https://youtu.be/Hyag7lR8CPA sent from hell using Tapatalk
        ~~~~~~~~~~~~~~~~~
        '90 325i sedan daily driven
        '85 325e coupe also a daily

        Comment

        • moatilliatta
          R3V OG
          • Feb 2005
          • 6121

          #19
          Sounds like its dumping somewhere when it cools. Maybe its making down the HVAC drains?

          They usually leak on the inlet / outlet side though into the floorboard.. .

          I assume this is a manual with no trans cooler in the radiator?


          I was up above it, Now I'm down in it ~ Entropy - A Build thread.
          @Zakspeed_US

          Comment

          • cheffy30
            E30 Enthusiast
            • Sep 2016
            • 1159

            #20
            nope it's an autotragic. you can eat off my garage floor. no leaks. no drips. sent from hell using Tapatalk
            ~~~~~~~~~~~~~~~~~
            '90 325i sedan daily driven
            '85 325e coupe also a daily

            Comment

            • roguetoaster
              R3V OG
              • Jan 2012
              • 7773

              #21
              Originally posted by cheffy30
              https://youtu.be/Hyag7lR8CPA sent from hell using Tapatalk
              I've seen another version of that before.

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              • moatilliatta
                R3V OG
                • Feb 2005
                • 6121

                #22
                Trans cooler is in radiator?

                check your trans fluid for coolant?

                Its usually the other way around though..

                I was up above it, Now I'm down in it ~ Entropy - A Build thread.
                @Zakspeed_US

                Comment

                • Tzantushka
                  Grease Monkey
                  • Nov 2018
                  • 389

                  #23
                  If hot/cold pressure test holds...
                  And no cross contamination with trans fluid/coolant...
                  Try a combustion gas tester (Tee Kay) in the coolant.

                  I have the same issue after replacing all the major components in the cooling system.
                  All hoses, tank, heater core, valve etc.
                  No oil in coolant or vice versa.
                  The level in the expansion tank drops 1/4 to 1/2 inch after a few hours drive.

                  Was also verified by an old school mechanic with the cold socket extension through the spar plug hole trick

                  Will get a new head gasket & head reco shortly
                  E30 320i vert
                  But daily drive is Volvo V60 Polestar

                  Comment

                  • twright
                    Mod Crazy
                    • Sep 2008
                    • 707

                    #24
                    I don't know if this will work but:

                    I've always been able to find coolant leaks by getting the engine good and hot by normal driving. Then park the car and LEAVE THE HOOD CLOSED for 5 minutes. After this 5 minute period, open the hood and search everywhere in he engine and passenger compartment for leaking coolant.

                    This period (5 minutes after shutdown) is the time that is most likely to cause a leak because the temperature and pressures are the highest.

                    Good luck.

                    Comment

                    • cheffy30
                      E30 Enthusiast
                      • Sep 2016
                      • 1159

                      #25
                      so... I have noticed it being leaked out of the blow hose on the neck of the expansion tank cap. the hose that dumps into the wheel well has been showing signs of leaking. I am tempted to call that the issue with the loss. now... why does it expand out of there is the question. sent from hell using Tapatalk
                      ~~~~~~~~~~~~~~~~~
                      '90 325i sedan daily driven
                      '85 325e coupe also a daily

                      Comment

                      • roguetoaster
                        R3V OG
                        • Jan 2012
                        • 7773

                        #26
                        So, would you say that you boil over more slowly now that you've come to terms with your coolant consumption?

                        Comment

                        • cheffy30
                          E30 Enthusiast
                          • Sep 2016
                          • 1159

                          #27
                          I'm rarely at a simmer... ever... but every day I'm puttin in 1/2 qt. I'll pull the expansion tank in the morning and rebuild it... maybe something is clogged? sent from hell using Tapatalk
                          ~~~~~~~~~~~~~~~~~
                          '90 325i sedan daily driven
                          '85 325e coupe also a daily

                          Comment

                          • e30austin
                            I waste 90% of my day here and all I got was this stupid title
                            • Sep 2010
                            • 15382

                            #28
                            dude. check the hose i told you to. i have a sneaking suspicion that's your issue. buy a new tank, too.


                            Comment

                            • moatilliatta
                              R3V OG
                              • Feb 2005
                              • 6121

                              #29
                              New tank and cap.

                              maybe a gauge on the coolant system to see if your over pressuring it.

                              anything old, replace it, inspect it, rule it out.

                              I was up above it, Now I'm down in it ~ Entropy - A Build thread.
                              @Zakspeed_US

                              Comment

                              • moatilliatta
                                R3V OG
                                • Feb 2005
                                • 6121

                                #30
                                heh

                                I was up above it, Now I'm down in it ~ Entropy - A Build thread.
                                @Zakspeed_US

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