Need help! How do I Drain Coolant?

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • 5ickride
    R3VLimited
    • Jun 2009
    • 2922
    #1

    Need help! How do I Drain Coolant?

    My radiator busted the other week and I'm in the process of replacing the radiator and changing the coolant. So when I removed the busted M42 radiator I just pulled all the hoses off and let the coolant leak out. I replaced my radiator with another M42 and thought I could just add coolant and that's it. I bought two gallons of the blue BMW coolant and two gallons of distiller water. When I went to pour it in, it only took about a gallon of coolant mixed with water.

    How do I drain the coolant completely (it's got the green coolant)?

    Thanks
    Tags: None
    • Boosted E30
      Wrencher
      • Dec 2009
      • 288
      #2
      Did you remove the vent plug on the top of the radiator right beside the filler cap?

        Comment

        • 10Toes
          Me Father Was A Tree
          • Jan 2008
          • 61222
          #3
          There is a plug on the exhaust side of the block.

            Comment

            • 5ickride
              R3VLimited
              • Jun 2009
              • 2922
              #4
              Originally posted by Boosted E30
              Did you remove the vent plug on the top of the radiator right beside the filler cap?
              Is that the bleeder screw? I use that to drain?

                Comment

                • 5ickride
                  R3VLimited
                  • Jun 2009
                  • 2922
                  #5
                  Originally posted by nwvb bmw
                  There is a plug on the exhaust side of the block.
                  On the s50 engine? Walk me through this, as I don't know where to look. Thx

                    Comment

                    • 325islovE
                      Advanced Member
                      • Feb 2007
                      • 133
                      #6
                      Originally posted by 5ickride
                      On the s50 engine? Walk me through this, as I don't know where to look. Thx

                      the drain plug is on the exhaust side of the engine, its that bolt that holds nothing on that side of the block. then blow some air through the system to get the rest of the green crap out
                      1988 325is alpine
                      1989 325is zinno RIP
                      1992 325ic alpine
                      1986 325e cirrusblau

                        Comment

                        • 5ickride
                          R3VLimited
                          • Jun 2009
                          • 2922
                          #7
                          I'll take a look but honestly Im still learning engines in general. So that plug will drain all the coolant? I guess once it's all out I just screw it back on and proceed with filling up with new coolant, right? Thx

                            Comment

                            • 10Toes
                              Me Father Was A Tree
                              • Jan 2008
                              • 61222
                              #8
                              I think it is a 17mm. Its the bolt in this pic (shown just behind the o2 sensor) Up and towards the back from the motor mount arm.

                                Comment

                                • 5ickride
                                  R3VLimited
                                  • Jun 2009
                                  • 2922
                                  #9
                                  Ok this helps. I'll check it out. Thx

                                    Comment

                                    • Boosted E30
                                      Wrencher
                                      • Dec 2009
                                      • 288
                                      #10
                                      Sorry don't know where I was going with that.

                                      The drain should be 19mm.

                                        Comment

                                        • 328ijunkie
                                          Forum Sponsor
                                          • May 2007
                                          • 3961
                                          #11
                                          19mm jammed behind the O2 sensor. It will puke coolant everywhere and make a mess, no way around it.

                                          Check Us out on Facebook
                                          Needing a harness adapter or wiring help? Check it out: also have 24v motor mounts, E30 M3 covers and E36 ECU mounts!
                                          Full Product Line Tuning
                                          OBD2 Tuning Available! OBD2 E36, S54 Swap, S62 Swap, etc: tuning@MarkertMotorWorks.com Dyno Thread

                                            Comment

                                            • 5ickride
                                              R3VLimited
                                              • Jun 2009
                                              • 2922
                                              #12
                                              ^^That's ok. I just want to get that green coolant out and pour in some of the blue stuff. I noticed when i took out the old radiator there was some sludge build up in the rad ...I want to make sure i get rid of all that. I'm gonna work on this tomorrow AM. thanks for the help

                                                Comment

                                                Previous template Next
                                                Working...