One of the various things I tried to use to replace my damaged plastic lines
to the expansion tanks was regular 'ol fuel line, which got pinched by the
tanks. It was a while before I could get back in there to fix them; during
that time the gas tank would only take a little more than 12 gallons from
empty, as opposed to ~16.

Cya,

Robert

From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Edward Duntz
Sent: Monday, October 26, 2009 3:24 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Expansion Tank Hose Weeps: Fuel Tank Full

It is my understanding that the expansion tanks are for expansion of gas
vapor, not liquid gasoline.

The top of the filler pipe is indeed higher than the tank, but the gasoline
shouldn't get right up to the top when filling. The gas pump should stop it
well before that, and also, on later models, there is a piece in the bottom
of the filler pipe where it goes in the tank to prevent this as well. It
looks like a ping-pong ball inside a small plastic cage.

I know of a guy who has totally removed both of his expansion tanks and he
says he has experienced not ill effects. I'm not recommending it, because I
don't know enough about the system to know whether they're necessary, and it
apparently may depend on the ambient temp?
>
> Not sure if expansion tanks end up with fuel in them when at gas
> station and filler pipe filled to top, but maybe later on if
> conditions caused fuel to expand enough. (hot day, altitude maybe
> too?)
>
> My understanding is that the expansion tanks are there (in part
> maybe?) for that reason.
>
> The top of the filler pipe is higher than the tank so I"m thinking
> that at least the fuel expansion tank hoses would fill with fuel when
> filler pipe filled to/near top.
>
> Neil.
>

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