It could be one of several things:

There are overflow/expansion hoses and tanks that come out of the top of
the fuel tank. If any of the hoses or seals are bad, fuel will leak. Also,
make sure there are not any holes in the expansion tanks (there is one in
the front wheel well on both sides of the van).

This only happens when the tank if full because fuel fills up in the fill
pipe above the level of the tank. So, any holes in hoses etc. will cause
fuel to leak until it is below the level of the hole.

I've had two hoses go bad on mine, so I've been there, done that.

Jon

On Tue, 5 Aug 2003, karen davis wrote:

> When I fill up my 84 westy, gas leaks out from underneath the car.  This
> only happens when I fill until the pump stops.  If I don't fill completely,
> I have no problem.  Any suggestions on what might be wrong.  There is a
> large gas leak underneath middle of van but again this is only if I fill it
> up competely.
>
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--
Jon Kenneke, General Manager
Kenneke Communications - http://www.kenneke.com
PO Box 3126 - Albany, OR 97321-0702
Radio Takena KTK - http://www.radiotakena.org