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    Fuel line and exhaust pipe

    Hi, spent last weekend putting a new stainless exhaust on and what a job that was trying to line up the rear sections!

    Having done that I am left worrying about the close proximity of the fuel line that runs down the central tunnel just above one of the silencers. The pipe is clipped inches above what will become very hot metal.

    Is this right and has anyone gone to the trouble of moving the fuel line to run away from the exhaust?

    Have their been any horror stories of fuel lines melting resulting in fires?

    Any comments.....

    #2
    My fuel line runs under the nearside floor, I've not seen that arrangement. Martin.

    Comment


      #3
      On my 71 MK1 federal Stag the line runs down the tunnel attached with clips I replaced the clips and used tie wraps also You should be Ok with it.I know some owners over here have moved it from that location to run under the drivers side that would be your passenger side of the floor pan.

      cheers Stuart

      Comment


        #4
        Originally posted by MLCstag View Post
        .... fuel line that runs down the central tunnel just above one of the silencers. The pipe is clipped inches above what will become very hot metal........
        Sounds like the standard arrangement to me. I think maybe the "very hot metal" idea may be a bit over the top. Sure, you maybe wouldn't want to grab hold of it with bare hands after a motorway run but it doesn't exactly have the effect of a hot air gun in removing surrounding underseal and the fuel line is metal as well. It's not as if there is a catalytic converter there.

        I reckon having the fuel line tucked up in the tunnel is a good way to protect it from damage by workshop lifts, scraping over kerbs etc.

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        2010 - 01 - 089 (Custom).jpg
        The answer isn't 42, it's 1/137

        Comment


          #5
          As Drew says, the front to rear fuel pipe is originally metal.

          The factory exhaust had a heat-shield above each silencer.

          Some replacement systems don't have these heatshields.

          I reckon they are necessary for hot fuel handling (but still not good enough for modern low boiling temp. fuels ~ some parts of our modern fuel have a 32 degree boiling point!!! )

          Rerouting fuel pipes isnt that straight-forward from an insurance point of view though & M.O.T. people are getting very fussy about pipe clips. (no cable ties allowed ....they can cause fretting)

          A few years ago someone posted about hot fuel handling problem on their stag.....they lived in a hot climate where the ambient temperatures were nearly high enough to boil the fuel!

          IIRC he rerouted the pipe alongside the sill flange.

          One hot fuel handling option could be to replace the front to rear fuel pipe using rubber or plastic, but minimising joins & covering with insulating sleeving.


          Originally posted by MLCstag View Post
          Hi, spent last weekend putting a new stainless exhaust on and what a job that was trying to line up the rear sections!

          Having done that I am left worrying about the close proximity of the fuel line that runs down the central tunnel just above one of the silencers. The pipe is clipped inches above what will become very hot metal.

          Is this right and has anyone gone to the trouble of moving the fuel line to run away from the exhaust?

          Have their been any horror stories of fuel lines melting resulting in fires?

          Any comments.....
          Last edited by jbuckl; 29 March 2012, 10:19.

          Comment


            #6
            So the suggestion is that the original pipe work would have been metal. This is plastic but retained in clips, is this typical of replacement fuel lines?

            Thanks for the comments.

            Comment


              #7
              My fuel lines are the original rigid plastic, Dec. '74 Mk 2. Martin.

              Comment


                #8
                I've worked in the car industry all of my life and I remember seeing one of the very first cars to be fitted with a plastic petrol tank. It went across the full width of the car with a moulded hump in the middle to straddle the exhaust pipe. I reckon the gap was only about 1" between exhaust and tank

                I remember thinking that it was asking for trouble however, much to my surprise, I never ever heard of any problems at all.

                Cheers

                Julian

                Comment


                  #9
                  That's a reassuring tale Julian, my concerns are easing.

                  The pipes are rigid plastic and could be the original make up as suggested by Martin. Mind you this is a 72 mk1 allegedly. Anyway onwards and upwards. Time to get onto the next problem replacing the inhibitor switch and cleaning out those carb jets.

                  Thanks again

                  Comment

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