fuel tank outlet.

Discussion in 'Mech Tech' started by VW-Pete, Nov 27, 2018.

  1. Hi all,

    i took my fuel tank out but completely forgot about the little outlet pipe and managed to bend it. as you can see it seems to have split into little bits.

    just wandered if anyone has used one of these bolt in repair outlets like on the below link are they any good? or would i be better to flush the tank and try and weld on someting new?

    https://www.vwheritage.com/11329822...MI86yS4Nv03gIVRKmaCh2dOwcvEAQYASABEgI1q_D_BwE

    tank is solid so i would rather ty and fix this than replace with anew one.



    DSC_1505.JPG
     
  2. Is the outlet the screw-in type or the brazed-on pipe?
     
  3. Brazed on
     
  4. You have a problem then, that outlet you linked to is for a different tank
     
    snotty likes this.
  5. ^this. Going to have to braze another one on, or replace the tank if it’s too far gone.
     
  6. Mine snapped off so I just drilled out old nozzle and Mig welded new one in its place.
     
  7. That's what I was thinking of doing Iv only just brought my first mig so not sure if I'm good enough to get a fuel tight joint.

    Looking on line lots of people solder petrol tanks. That may be a safer option for me.
     
  8. I had the same problem, the pipe was rotten and fell to bits when I tried to slide a new pipe over it.

    With no access to welding/brazing gear I went for a mechanical fitting. Firstly cutting the pipe back, drilling it out and then tapping it with 1/4BSP. I was suprised by the thickness of the metal but i think it is strengthened at this point to support the old pipe. To ensure a seal I used expoxi tank sealer around the thread and around the Base of the fitting. Pic show the brass fitting I used.

    The advantage was that the tank didn't have to come out and no heat involved and so no chance of setting anything on fire.

    Screenshot_2018-11-27-20-37-38.png
     
    mikedjames and VW-Pete like this.
  9. I used a piece of copper and nickel brake pipe and silver soldered it
     
    VW-Pete, 77 Westy and snotty like this.
  10. Thanks I will give that a go.
     
  11. mikedjames

    mikedjames Supporter

    I have tried to weld petrol fittings several times and only the last one was a success where I welded on a nut to take a banjo bolt fitting on the fuel filler elbow - its a FI return for my still to be fitted K-Jet system.
    I managed to create good looking welds with small cracks that petrol seeped out of.
    I like the idea of the tapped fitting and epoxy best. Soldering may crack with movement.

    But I wouldnt like to weld anything enclosed which had held petrol without flooding it with welding gas or similar after thoroughly steam cleaning it.
     
    Valveandy likes this.
  12. 77 Westy

    77 Westy Supporter

    Braze is best, but get someone else to do it while you take the pics, from a distance. And I’d use that first pipe you linked to for an early tank so there is plenty of surface area for the braze.
     
    snotty likes this.
  13. matty

    matty Supporter

    And don’t do what a friend did and use a vacuum cleaner to suck the fumes out of a petrol tank
     

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