Don, this is usually caused by either the plastic cross over pipe breaking
or the rubber vent lines on the top of the tank rotting out.  I have fuel
tank kits that address these leaks by giving you all of the parts you need
to repair your tank properly.  I also have a write up on my website about
how to remove and replace the tank and the gaskets.  You will have to drop
the tank no matter what to fix this so if there is a rust hole on the top
or if you see the inside of the tank is rusty, you can replace that at the
same time.  Usually it is just the soft parts that are bad though.

Let me know if we can help you with this one.

Ken Wilford
John 3:16
www.vanagain.com

On Mon, Mar 11, 2013 at 1:51 PM, Don Hanson <dhanson928@gmail.com> wrote:

>    I know this may be somewhere in the archives.   I have never found the
> archives useable, so I am just List-asking straight out...
>
>    My 84 has always had a slight gas odor after filling to the top...and
> not just from the usual 'spitting-up' that frequently seems to happen when
> you use the gas pump's auto shut-off feature...   I've just been 'living
> with it' forever, thinking it was not so big a deal,  but I recently
> noticed, after filling up, there was actually a small pool of gasoline
> under my van, and more still dripping out....Dunno whether this has been
> going on all along and I just noticed, or maybe the leak/overflow problem
> is getting worse....but not that I've seen this, I want to take care of the
> problem...
>
>    Can someone point me to the fix for this problem, which I assume is
> frequent with our older vans, rotting hoses, etc...Thanks
>    Don Hanson
>