On Fri, 5 Jun 1998 09:05:35 +0100, you wrote:

>I have a 1989 1.7 Diesel Transporter panel van and have just noticed 2 white
>(blow moulded) plastic tanks each mounted inside the rear top of each of the
>front wheel arches.
[snip]
>Can anyone tell me what the function of these tanks is? To where are they
>connected and what fluids (if any!) should be in them.

These are fuel expansion tanks.  They collect vapors and overflow from the
fuel tank; a pollution control measure.

The "ports" on the side are actually just protrusions to hold them in
place.  The hoses connect to the breather tubes on the fuel tank.  There
is also another hose hidden from view on top.  See Bentley 20:10 for
further enlightenment.

If they aren't leaking fuel, you can ignore them.

Regards,
Steve Green, Folsom, CA
Zefram, 1984 Wolsburg Westfalia