Gas tank draining?

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  • MitchFong
    Mod Crazy
    • Sep 2005
    • 665

    #1

    Gas tank draining?

    Is there a way to drain the gas out of my fuel tank? Im going to install a chip, but im not sure if there is 91 octane gas in it currently and do not want to take the chance of there not being.
    Is there a way to drain the gas out of the tank without having to take the tank off?
    Thanks alot,
    Mitch F.
  • Jarvis
    R3VLimited
    • Nov 2003
    • 2132

    #2
    Unbolt the gas tank drain plug (right side?).

    Careful, it likes to strip and probably has never been unscrewed before.

    Comment

    • lordofthewaters
      Mod Crazy
      • Oct 2005
      • 714

      #3
      gas tank drain

      There is a drain plug in the tank if you look. Mine's on the passenger side. Basically if you look at the tank it's right there in front of you. I'd drive most of the gas out if it's full though. Kind of hard to get a 14+ gallon pan under the car. Or you could run a small "drill pump" and pump the gas out into cans. That's pretty time consuming if it's full.

      Sarcasm is a body's natural defense against stupid.
      When a man talks dirty to a woman, it's sexual harassment. When a woman talks dirty to a man, it's £3.95 per minute.
      "My mother never saw the irony in calling me a son-of-a-bitch." Jack Nicholson"
      Old age and treachery will always overcome youth and skill.



      Comment

      • DarkWing6
        Moderator
        • Apr 2004
        • 7144

        #4
        Wait a week until you are out of gas, fill up with 91, then instal chip.

        There are other ways, but this would be easiest.
        sigpic

        Comment

        • MitchFong
          Mod Crazy
          • Sep 2005
          • 665

          #5
          cars in sotrage now. winter time here.
          Ill check for a drain plug, if not ill wait till spring to put it in.
          thanks

          Comment

          • arsevader
            E30 Enthusiast
            • May 2005
            • 1025

            #6
            Originally posted by MitchFong
            cars in sotrage now. winter time here.
            Ill check for a drain plug, if not ill wait till spring to put it in.
            thanks
            Add an octane additive.

            James

            Comment

            • MitchFong
              Mod Crazy
              • Sep 2005
              • 665

              #7
              Originally posted by arsevader
              Add an octane additive.

              James
              Can you do that? and explain, please..

              Comment

              • arsevader
                E30 Enthusiast
                • May 2005
                • 1025

                #8
                Originally posted by MitchFong
                Can you do that? and explain, please..
                Never done it myself but I know you can buy Octane boosters at most auto parts stores. You add them to a tank like fuel injector cleaner.

                Not sure that this would be what you need but it might be worth a shot. Do you know if the car has a full tank of gas?

                James

                Comment

                • erik325i
                  No R3VLimiter
                  • Jan 2005
                  • 3567

                  #9
                  Originally posted by arsevader
                  Add an octane additive.

                  James
                  Octane boosters only add a fraction of an octane.
                  You will not be able to bring 87 octane up to 91 with just octane boosters.

                  -Erik

                  Comment

                  • arsevader
                    E30 Enthusiast
                    • May 2005
                    • 1025

                    #10
                    Originally posted by erik325i
                    Octane boosters only add a fraction of an octane.
                    You will not be able to bring 87 octane up to 91 with just octane boosters.

                    -Erik
                    Not quite a fraction but I'm not sure it's really worth the hassle.



                    As others have suggested, just run the gas down untill you can add a higher octane gas in the Spring.

                    James

                    Comment

                    • MitchFong
                      Mod Crazy
                      • Sep 2005
                      • 665

                      #11
                      yea ill probably just wait. I need to re furbish my wheels, so atleast ill have something to do over christmas break.
                      Thanks for your help, i still may try and drain the gas tho.
                      Theres under a half tank

                      Comment

                      • DarkWing6
                        Moderator
                        • Apr 2004
                        • 7144

                        #12
                        Another way you could do it if you are really itching to get that chip in is by using your fuel pump to drain it. Take out your fuel pump, hook up lines to each end (one into the tank and one into a container for the gas), then hook up 12 volts to the pump and let it go. Process explained below in picture.



                        BTW - Don't use a garbage can that has a hole in it. :D
                        sigpic

                        Comment

                        • SchnellerVert
                          No R3VLimiter
                          • Sep 2005
                          • 3948

                          #13
                          Leave the fuel in it with a bottle of Stabil also in it. It's not worth the hassle, or Start the car and let the fuel burn off.

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