I have the VDO sender in my sump.  No engine or sender modifications are
required.

The oil drain plug, that I have in my hand from my '87 Vanagon is m14x1.5,
13mm across the flats.

My spare VDO sender, that I have in my hand, is part number 323 055 300F
m14x1.5, 17mm across the flats, with a spade fitting.

For a source:
http://www.vdona.com/online%20catalogs/performance%20catalog/Perf%20Cat%20HT
ML/perf%20cat%20senders%20frames.html , just from a net search.

I took a cheap 17mm socket mounted in my drill press and using a die grinder
ground the outside of the socket to just under 25mm in diameter.  This is a
close fit in the sump recess, but no engine modifications are required.

As the threads are not NPS, national pipe standard, no thread sealant is
required, just the copper crush washer.

Joe Fahy

----- Original Message -----
From: "The Bus Depot" <busdepot@EMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, March 01, 2001 10:57 PM
Subject: Re: VDO sump plug sender

>
> > What can you
> > recommend for me as far as the sending unit that will work with a VDO
> > gauge? ( I  have no inclination to drill any holes in my motor ) Does
Bus
> > Depot offer a solution?
>
>
> You will have to drill a hole in your oil sump plate to use the VDO
sender.
> They make a dipstick sender but it is not for a Vanagon.
>
> - Ron Salmon
>   The Bus Depot, Inc.
>   www.busdepot.com
>   (215) 234-VWVW