Drain pipe blockage from fuel filler cap recess

[GravyGraham]

As the thread title says, my '72 2+2 has a blocked pipe from the recess surrounding the fuel filler cap. I managed to poke some fine wire down there about 300mm but no further. Can anyone tell me where the end of this pipe is so maybe I can unblock it from the other end? Or is it not quite as simple as it might first appear?

Thanks in advance for any replies. Graham.

[David Oslo]

(I'm replying here too, for the benefit of the folks not in Technical thread)

I will qualify my answer as being based on my S1. However it is a 2+2 and it is Pale Primrose (but not for much longer).

My fuel drain exits approx 3" rearwards of the leading edge of the lower surface of the rear wing / wheel arch. More or less in line with the wheel itself. In other words aft of the rear wheel. On downwards facing surface of rear wing. Think mud-flaps and where they normally are. Three inches rear of that.

I took a picture but it didn't really say much. Just yellow metal with a hole in it. Hence didn't load it up.

Let me know if you can't figure out where I'm trying to describe.

[GravyGraham]

Thanks for your response David. I'm presuming you're saying there's a drain hole in the underside of the arch about where my finger's pointing in the photo. There's nowt apparent on my car - am wondering if it's been inadvertently sealed over during a restoration!

[David Oslo]

Replying here too for the sake of clarity.

Picture of my S1 fuel drain hole.

[abowie]

The top and bottom holes have a short piece of metal pipe on the inside; these are joined by flexible hose. If you really want to you can access them by removing the fuel tank.

In some cars the bottom metal pipe is Y shaped; the other limb connects to the drain in the rear hatch body channel.