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Why has my fuel tank got two breathers?

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    Why has my fuel tank got two breathers?

    Looking at the breather thread, and in my workshop manual, seems the breather to the fuel tank goes up a pipe, through a fuel filter then connects to the side of the chrome filler cap.

    On my tank however, and not illustrated in the manual, next to my fuel level sender, I have the half inch diameter pipe that joins onto the side of the filler neck hose, but in addition, next to this, I also have a pipe that is perhaps 1/4 inch, just a couple of inches long, that connected to a plastic pipe that went straight out the boot floor with no filter, and it wasn't even raised so I wonder how much fuel I lost if I ever filled the tank to a higher level?

    Is this extra breather tube standard?, or should I block it off?
    To use it would mean I really should have two raised filters!

    Pete

    #2
    This is a fuel return stub for PI cars and should be blanked off on your Stag, use some hose and a bolt.

    Ian

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      #3
      Originally posted by iani View Post
      This is a fuel return stub for PI cars and should be blanked off on your Stag, use some hose and a bolt.

      Ian
      Cheers Ian.
      Does this mean I have a Saloon tank or did Triumph fit the same tank to both cars?

      Comment


        #4
        Originally posted by Nambo View Post
        Cheers Ian.
        Does this mean I have a Saloon tank or did Triumph fit the same tank to both cars?
        The tank is common with the 2000/2500 Estates, some of which were 2.5Pi's

        Comment


          #5
          Originally posted by Nambo View Post
          Cheers Ian.
          Does this mean I have a Saloon tank or did Triumph fit the same tank to both cars?
          An estate possibly-a saloon no they were different and fitted behind the rear seat sitting upright.

          Comment


            #6
            Originally posted by Nambo View Post
            Cheers Ian.
            Does this mean I have a Saloon tank or did Triumph fit the same tank to both cars?
            Same part no's for the Stag and 2000/2500 Saloons fuel tank 312402
            1976 Triumph V8 Manual/OD in BRG

            Comment


              #7
              Originally posted by NickA View Post
              Same part no's for the Stag and 2000/2500 Saloons fuel tank 312402
              Does this mean everybody else has the extra but blanked off breather tube on their Staag?

              Comment


                #8
                Originally posted by Nambo View Post
                Does this mean everybody else has the extra but blanked off breather tube on their Staag?
                Oh yes

                Cheers

                Julian

                Comment


                  #9
                  Originally posted by jleyton View Post
                  Oh yes

                  Cheers

                  Julian
                  Not necessarily, if you bought a remanufactured tank from RB then it doesn't come with the additional pipework.

                  Comment


                    #10
                    Fair point - but that's not a 'real' one

                    Cheers

                    Julian

                    Comment


                      #11
                      rac is correct the saloon tank is not same as stag as it is rectangular in shape and sits upright at the back of rear seat I believe the estate tank is like stag tank

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