Date: Thu, 3 Jul 2008 16:02:19 -0700
Reply-To: Old Volks Home <oldvolkshome@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Old Volks Home <oldvolkshome@GMAIL.COM>
Subject: Re: PN question ("step down" hose from pump to filter)
In-Reply-To: <c4e7c5f90807031052i5de5d18at9466311871493a7c@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
If memory serves, the metal cannister filter, such as the 0450 905 030 is
designed to be used AFTER the pump. The pump used on the Vanagon (as well
as 75-79 Bugs & Buses) has a large opening on the "tank" side (ie: the
inlet) and a smaller outlet (8mm) on the pressure side towards the engine.
The 0450 905 030 has 8mm push-on fittings fore and aft, so no adaptor should
be needed.
However....certain models of Vanagons from 80-thru the mid/latter 80s (as
well as the only filter on 75-79 Bugs & Buses) also used the square plastic
filter (133 133 511) as a "prefilter" and some Non California Air
Cooled models didn't even have the above cannister filter. This filter has
an 8mm inlet fitting to match the hose coming from the tank and the larger
outlet to match the larger inlet at the fuel pump. VW, with some sort of
wisdom (or lack thereof,) discontinued using the "prefilter" and substituted
that with an obscenely priced adaptor fitting (your indicated 251 201 534 A)
in it's place. These are essentially 1/2" to 1/4" reducers and can be
sourced at most FLAPS or even the hardware store in some cases for just but
a fraction of what VW would want to ding you for and I recommend metal
instead of plastic. If you do use plastic, make sure it's fuel resistant so
that it doesn't melt on ya.
On both of my 84s, I continue to use the square plastic filter and the metal
cannister filter as they were originally equipped that way to keep the
foreign matter out of the fuel pump. It's my understanding that later
production and replacement fuel pumps comes with a screen in the inlet, thus
negating the need for the plastic filter, but I still use one anyway. I
change it out every other oil change (they're cheap) for preventative
maintenance reasons.
And yes, I would recommend using both for maximum protection.
In ETKA Vanagon, select Illustration 28-00, Key #18 in the middle portion of
the diagram and you will see what I'm talking about in regards to the
reducer/adaptor.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
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On Thu, Jul 3, 2008 at 10:52 AM, neil N <musomuso@gmail.com> wrote:
> Hi all.
>
> Not sure if this is an "improvement" but.....
>
> In searching for a way to use a Bosch metal "can" type fuel filter on
> my '81 Westy (PN: 0 450 905 030) my parts guy found a piece of molded
> fuel hose to serve as a "step down" for transition from the larger
> fuel pump OD to this (and possibly better??) fuel filter
>
> Molded hose PN: 251 201 534 A
>
> ETKA showed dimensions of 12.5 mm and 8 mm.
>
> Has anyone used this in conjunction with the larger metal "can" type
> fuel filters?
>
> I have the metal filter already. Is this type of filter any better
> than the stock square Vanagon filter?
>
> Thanks,
>
> Neil.
>