Soap suds are a good thing.  You might want to use a little more pressure
than your mouth.  There are an amazing number of openings in a vanagon fuel
tank.  You need a very large rubber stopper for the filler pipe opening.  I
seem to recall it went flying across the shop at one point.   :-)

Larry A.
  don't let your fuel pump flatten your tank

On Tue, Jun 22, 2021 at 5:35 PM Alex MeVay <alex@mevay.org> wrote:

> > I have had new tanks with fuel flow issues
>
> Yikes.  I have new a fuel tank (JP Group from GoWesty, IIRC) waiting
> to go in in the next month or three when I do my cooling tubes.
>
> Is there any way to check or clean the tank before it goes in to avoid
> these issues?
>
> Thanks also Dennis and Ken for the tips on the fuel sender.  I assume
> soapy water and mouth air pressure with the other holes plugged is
> good for finding leaks?
>
> Thanks as always,
>
> Alex
>