Hi Vince,

A pressure regulator won't be able to do its job if it's downstream
from a plugged filter.

But....

Which Vanagon are we talking about here? My Dad's aircooled westy with
FI has the filter upstream of the pump. So does my FI'd  baywindow. If
VW changed this sometime later I guess I didn't realize it, as I've
never been under a wasserboxer. I just ASSuMEd they'd stay with a
sensible design.

The fuel lines on an aircooled bus make it difficult to get this
wrong... There's a 7mm line to the filter, then a 12mm line from the
filter to the pump, followed by a 7mm line to the engine. The hoses
won't fit if you try to wire it wrong, unless you want to pump fuel
from the engine back to the tank. It's pretty much impossible to
install a stock filter after the pump with this setup.

Happy trails,

Greg Potts
Toronto, Ontario, Canada

1973/74/79 Westfakia Conversion **Bob the Tomato**  LY3H
1977 Sunroof Automatic L63H/L90D
http://www.pottsfamily.ca/westfakia
http://www.busesofthecorn.com

On 8-Sep-04, at 3:07 PM, Vince S wrote:

> What! Vanagon's standard configuration has a fuel filter downstream of
> the pump. The safety cut off may be 110 PSI but I seems to remember the
> regulated pressure is under 30 PSI.
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of Greg Potts
> Sent: Wednesday, September 08, 2004 9:20 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: looking for technical assistance in Wisconsin or
> Michigan/UP
>
>
> Hi Malcolm,
>
> I don't think that a filter after the pump is a good idea. The
> high-pressure cut-off on the bosch fuel pump for a vanagon is about 110
> PSI. If anything ever did get past the first filter to plug the second
> one then that second filter and the clamps and line back to the pump
> are
> going to take a huge pressure load. I don't think that would be pretty.
>
> You do want to have a filter in front of the pump, this will protect
> the
> pump's innards. If you must have two filters inline I'd suggest you put
> both of them upstream from the pump.
>
> Happy trails,
>
> Greg Potts
> Toronto, Ontario, Canada
>
> 1973/74/79 Westfakia Conversion **Bob the Tomato**  LY3H
> 1977 Sunroof Automatic L63H/L90D http://www.pottsfamily.ca/westfakia
> http://www.busesofthecorn.com
>
>
> On 8-Sep-04, at 8:56 AM, Malcolm Stebbins wrote:
>
>> --- James Fritz <jfritz@ALPINECOM.NET> wrote:
>>
>>>> As you may recall, the problem was a little plastic  inverted cone
>>>> shaped filter on the inlet side of the fuel pump.  It was packed
>>>> full of rust and crud.
>>
>> For this reason I put a fuel filter BEFORE and AFTER the fuel pump.  M
>
>