There's a decent explanation, with pictures, right here:

http://www.thesamba.com/vw/forum/viewtopic.php?t=269355&highlight=oil+pump+gasket

Chris S.

On Tue, Jul 22, 2008 at 6:20 AM, Frank Condelli <RAlanen@aol.com> wrote:

> In a message dated 21/07/2008 5:04:10 P.M. Central Standard Time,
> LISTSERV@GERRY.VANAGON.COM writes:
>
> Bentley,  in the diagram on 17.7, show the oil pump as having a paper
> gasket
> between  the pump housing and the block, but not between the housing cover
> and the  housing. Seems I wirebrushed off a paper cover when disassembling
> the pump,  and it makes sense that one would go there, but also that it
> would
> add  unwanted distance between the pump gears and the housing  cover.
> Anyone?
>
>
>
>
>
>
>
> Jim, you've found yet another error in the  Bentley.  There are two gaskets
> there.  Gasket, oil pump, pump cover  to pump body, 111 115 131B and
> Gasket,
> oil pump, pump body to engine, 025  115 111A.  These gaskets are still
> available
> from VW.    I  keep them is stock, see my _Vanagon Items Forsale_
> (http://members.aol.com/Fkc43/sales.htm)  "Engine"  webpage.   DO NOT
> TRUST THE BENTLEY !
>
>
> Cheers,
>
> Frank  Condelli
> Almonte, Ontario, Canada
> '87 Westy & Lionel Trains (_Collection for sale_
> (http://members.aol.com/Fkc43/trainsal.htm) )
> _Frank Condelli &  Associates_ (http://members.aol.com/Fkc43/busindex.html
> )
> - Vanagon/Vanagon Westfalia Service in the Ottawa Valley
> _Vanagon Stainless Steel Exhaust  Systems_
> (http://members.aol.com/Fkc43/exhaust.htm)
> _BusFusion_ (http://members.aol.com/BusFusion/bfhome.htm)  a VW Camper
> camping event, Almonte, ON, June 12 ~ 15,  2008
>