cant remove fuel rail

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  • tjmonsen5
    Wrencher
    • Jan 2006
    • 232

    #1

    cant remove fuel rail

    hello R3V,
    i am in the process of changing my fuel injector O Rings because the 5 and 6 cylinders are leaking fuel all over the place and it has a strong gas smell. I removed all fuel lines, removed 10 mm screws from rail, removed retaining clips, and disconnected electrical connections. I cannot pull the rail off of the injectors!! How hard is this supposed to be? I even tried my 2 giant screwdrivers to pry it off but that didnt work either I thought this was supposed to be a 2 hour process but its taking wayyy longer!
    I have a thread in bimmerforums about this too,
    Bimmerforums is the preferred online BMW Forum and community for BMW owners. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm ideas for the future.
  • fretburnr
    E30 Fanatic
    • Jan 2005
    • 1496

    #2
    the injectors are clipped to the rail itself with circlip-type fasteners. Without undoing them, you'll have better luck pulling the rail out with the injectors - but that's a bitch to maneuver.

    make sure to undo and remove the circlip from each injector (dont lose 'em)... they shouuld pull/slide off relatively simply.

    also note that the injector harness rail / loom gets a bit in the way... you can undo the connection to it under the intake manifold and remove it first. It's a large circular connection, quarter/half turn to unlock - similar to the fitting on the o2 sensor, directly below the throttle body/manifold by 6" or so.
    Jay

    Comment

    • tjmonsen5
      Wrencher
      • Jan 2006
      • 232

      #3
      i removed those circlip things, i just cant get the fuel rail to budge at all! Im thinking of using my big screwdriver with a pole on it to get some extreme leverage.

      Comment

      • Tangent
        E30 Addict
        • Mar 2004
        • 476

        #4
        I remember it taking a hell of alot more force to pull the rail off than I thought it would when I did it. Wiggle it some to loosen it and get some good leverage...

        Comment

        • fretburnr
          E30 Fanatic
          • Jan 2005
          • 1496

          #5
          careful not to bend the rail, it can happen.

          rock it or twist it left and right (passenger to driver side) as you pull with your fingers or screwdriver etc. the o-rings are probably really old and seated/melted in place.
          Jay

          Comment

          • tjmonsen5
            Wrencher
            • Jan 2006
            • 232

            #6
            im gonna spray some WD 40 where the rail meets the injector, hopefully it will come loose after soaking for a few hours.

            Comment

            • 2002maniac
              R3V Elite
              • Feb 2005
              • 4260

              #7
              yank on it really hard. Eventually you'll fall on your ass and the fuel rail will be in your hands.

              Comment

              • MarshallM
                Wrencher
                • Feb 2007
                • 229

                #8
                Get a bigger pry bar and put a block under it. If that doesn't work get another pry bar and get it from both sides. Remember leverage is your friend.

                Comment

                • tjmonsen5
                  Wrencher
                  • Jan 2006
                  • 232

                  #9
                  OK! I finally have everything removed! It was a complete bitch too jeez some of those injectors needed some force, such as number 3, omg it took forever, but some just wiggled right out. WD 40 helped alot. I looked at the holes where the injectors came out of, and theres a lot of dirt and crap in there. I would spray brake cleaner in them, but wasnt sure if it would be extremely bad if i let that dirt get down into the cylinders. I think this dirt added to the troubles of removing the injectors. How can i get rid of this dirt? just spray it down into the cyliner?

                  Comment

                  • 87-325ic
                    E30 Enthusiast
                    • Apr 2006
                    • 1198

                    #10
                    if you still havent gotten it off, Do this.

                    remove each injector elctrical harness, then twist each injector around, one by one. this breaks the seal theyve created over the years.

                    then, start at one End, slowly and carefully pry up on it with a very large screwdriver or pry-something..

                    working from one end to the other allows you to fight just one injector at a time so to speak, rather than just trying to evenly pop the whole thing off with all 6 injectors holding on to it.

                    Comment

                    • tjmonsen5
                      Wrencher
                      • Jan 2006
                      • 232

                      #11
                      I replaced everything, and now the car runs like brand new!! No more crappy idle, plus the rpms dont dip down anymore when you let off the gas!! The O rings are definetly what needed to be replaced. Because replacing the air boot and air filter didnt improve anything. After the o rings went in... PROBLEM SOLVED!!! Im so psyched to drive my car now!! All of the snow better melt and the roads better get cleared of all the salt cuz i wanna drive my fixed car!!!

                      Comment

                      • amdspitfire
                        Wrencher
                        • Mar 2006
                        • 254

                        #12
                        whats the easiest way to remove the o-rings on the tip of the injectors, I got the ones on the top off easily.

                        Comment

                        • MR 325
                          Moderator
                          • Oct 2003
                          • 37827

                          #13
                          Originally posted by amdspitfire
                          whats the easiest way to remove the o-rings on the tip of the injectors, I got the ones on the top off easily.
                          I always just snip them off with dikes. I'm sure that's not the proper way to do it but it works for me.
                          BimmerHeads
                          Classic BMW Specialists
                          Santa Clarita, CA

                          www.BimmerHeads.com

                          Comment

                          • amdspitfire
                            Wrencher
                            • Mar 2006
                            • 254

                            #14
                            Originally posted by MR 325
                            I always just snip them off with dikes. I'm sure that's not the proper way to do it but it works for me.


                            is that a dike?

                            Comment

                            • MR 325
                              Moderator
                              • Oct 2003
                              • 37827

                              #15
                              Yes, dikes=cutters.
                              BimmerHeads
                              Classic BMW Specialists
                              Santa Clarita, CA

                              www.BimmerHeads.com

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