Thanks, John -- Jim Arnott was kind enough to send me a pdf of 2 01 32
and yeah, it shows a buncha relevant parts. David Beirel pointed me to
Bentley page 20.16 which is also very helpful.

I'll take a closer look at the situation today and see if I can sort out
what that loose hose was meant to be attached to. Probably the gravity
vent valve, as David proposed.

It's amazing to me how many systems and subsystems cars have!

-- RJS

On Sun, 2011-07-10 at 23:39 -0500, John Rodgers wrote:

> The ETKA shows I think what you seek in drawing number 2 01 31 and 2
> 01 32 - the fuel tank and all associated parts - tank, expansion
> tanks, hoses and fittings.
>
> Drawing number 9 55 148.00 shows the complete windscreen washer
> system.
>
> John
>
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com
>
>
> On 7/10/2011 8:07 PM, Rocket J Squirrel wrote:
>
> > In the driver's side front wheel well is a bulgy-shaped tank of
> > translucent white plastic. Looks like something that fell out of a cow's
> > nose, if the cow was the size of a house.
> >
> > There is a tube, or stiff hose, that goes to it, or sorta close to it.
> > My son and I found this loose tube today when we were routing wires for
> > gauge senders from the engine compartment forward. Can't tell where the
> > tube went or if it's just supposed to hang there, open like that.
> >
> > See photo at
> >
> > <https://picasaweb.google.com/lh/photo/FoRHHsDdb8sM2I7wJ6XxVlJbs0jfqWzYGmp3wNhwT3E?feat=directlink>
> >
> > What is that tank and what is that tube/hose?
> >
> > 1984, 1.9L, auto transmission. Shoe size: 10W, favorite color: orange.
> >
> >
> > --
> > Rocky J Squirrel (Jack Elliott)
> > '84 Westfalia: Mellow Yellow ("The Electrical Banana")
> > '74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
> > Bend, OR
> > KG6RCR
> >
> >