Vince,

It isn't that simple and there isn't a  "Vanagon's standard configuration."

For gas engines, the filter is before the pump, as per Bentley for:
AC,  p 20.2 - 20.3 and 20.4
Digijet, 20.16 - 20.17 and 20.18,  both the small plastic cube like filter,

but there are two filters shown for the Digifant,  the standard small
plastic one before the pump and the larger canister type after it:

Bentley, 20.26-20.27, except that the Syncro only is shown with one, the
canister type after the pump, 20.34.

OK, equal time, the filter, very different, is before the pump in a
diesel, 20,10.

Sam

--
Sam Walters
Baltimore, MD

89 Syncro GL
85 Westy Weekender
84 Vanagon, original owner, soon to be retired, just too many problems

All incoming and outgoing email scanned by
automatically updated copy of Norton AntiVirus.