Cooling question

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  • Vanilla Gorilla
    Grease Monkey
    • Dec 2006
    • 357
    #1

    Cooling question

    I have been having some issues with my cooling system. I have to replace the two vacuum hoses that attach to the throtle body and also the gasket for the piece where they attach with the two nipples. After I completed this process my coolant stopped leaking but once I was driving and tried to open up the car the bottom hose where it attaches in the area I circled in the above diagram blew out and coolant was pouring everywhere. I look at the nipple elbow that blew out and it dosen't seem to screw in at all it just slides into the hole. I feel like there should be something to hold the elbow in since the entire system is under pressure. Could it also have blown out because there was too much air in my system? Maybe I didn't bleed the air out enough? Any suggestions would be appreciated. Thanks
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    • Vanilla Gorilla
      Grease Monkey
      • Dec 2006
      • 357
      #2
      I have gotten the car running. I bled the system and everything seems to be working fine. However, that elbow is still dripping coolant a little bit and I'm nervous that if I get into the car at all it will blow out again. Anybody ever JB weld that elbow into place? Ideas??
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        • PeaveyBassist
          No R3VLimiter
          • Sep 2004
          • 3511
          #3
          You put a hose clamp on it right?

          Will
          RIP e30 (brilliantrot '91 325i) 11/17/06 Byebye: 8/21/07
          Welcome e30 (brilliantrot '90 325is) 12/23/06
          DaveCN = Old Man
          My signature picture was taken by ME! Not by anyone else!



          Originally posted by george graves
          If people keep quoting me in their sig, I'm going to burn this motherfucker down.

            Comment

            • Vanilla Gorilla
              Grease Monkey
              • Dec 2006
              • 357
              #4
              It's not dripping from the hoseclamp that area is all tight. It's leaking from where the elbow inserts into the thermostat. Is there a retaining clip or something I'm missing?
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                • PeaveyBassist
                  No R3VLimiter
                  • Sep 2004
                  • 3511
                  #5
                  Like the housing itself is leaking?

                  Will
                  RIP e30 (brilliantrot '91 325i) 11/17/06 Byebye: 8/21/07
                  Welcome e30 (brilliantrot '90 325is) 12/23/06
                  DaveCN = Old Man
                  My signature picture was taken by ME! Not by anyone else!



                  Originally posted by george graves
                  If people keep quoting me in their sig, I'm going to burn this motherfucker down.

                    Comment

                    • Vanilla Gorilla
                      Grease Monkey
                      • Dec 2006
                      • 357
                      #6
                      On the bottom of the thermostat housing there is an elbow that is inserted into it. The elbow has a hose that connects to the side of the throttle body to carry coolant so it dosen't freeze in cold weather. The elbow is not threded it is just a smooth surface that slides into the hole in the bottom of the thermostat. Because there is no way to fasten or secure this elbow in place the pressure in the system is blowing the elbow out of the hole and causing a leak.
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                        • jlevie
                          R3V OG
                          • Nov 2006
                          • 13530
                          #7
                          The safe approach would be to replace that housing.
                          The car makes it possible, but the driver makes it happen.
                          Jim Levie, Huntsville, AL

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                            • mops
                              Advanced Member
                              • Jan 2006
                              • 138
                              #8
                              make sure all the bolts are tightened down. Once I replaced a water pump on the car and as I removed timing belt and accesories to get to water pump, first attempt on waterpump bolt I noticed that the screw was loose. it wasn't even fingertight... so plz eliminate it.It is absolutely crucial to pinpoint location of the leak.

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                                • Vanilla Gorilla
                                  Grease Monkey
                                  • Dec 2006
                                  • 357
                                  #9
                                  I replaced the thermostat and the housing and it fixed the issue. Thanks everyone
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