Date: Thu, 13 Dec 2007 11:35:46 -0800
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: fuel tank <-> pump diameter mismatch
In-Reply-To: <43442.208.27.111.121.1197559826.squirrel@webmail.offthehill.org>
Content-Type: text/plain; charset=ISO-8859-1
Dan -
The size of the larger inlet hose is 11mm (VW N 020 300 1). I have used
standard 7/16" hose from a FLAPS, but this uncommon hose isn't really easy
to find. I have gotten away with using 12mm Cloth Braided Emissions/Vapor
Hose (VW N 020 374 1) as the barbs on my pump and the pre-filter pretty well
accomodate the hose and because there is no pressure to deal with should be
quite safe. Always use clamps of course. This is what I've run for the past
10 years now.
Now a bonus for you (& other list members) if you choose to use the factory
style square plastic pre-filter like I do on both my 84s:
VW: 133 133 511
Bosch Short: 71013
Bosch Long: 0450901005
Wix: 33274
Fram: G3743
--
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
***********************************
On Dec 13, 2007 7:30 AM, Dan Barrett <dbx@pobox.com> wrote:
> Thanks to Ed and Dennis for the replies.
>
> Bonus round: does anyone know offhand what the inner diameters of the fuel
> pump inlet and the fuel tank outlet? I've got some 7mm fuel line left
> over from the engine swap, but I don't have the larger hose to fit the
> fuel pump.
>
> Will check the charcoal; there are definitely venting problems going on
> here, as well -- my less-than-six-month-old fuel pump now sounds like it's
> straining, and the tank overflows whenever I fill it up.
>
> Best,
> d.
> 1990 GL -- "Mudskipper"
>
>
>
> > The aftermarket repalcement tank uses the same outlet as used from
> > 1980-1985. The prepump fuel filter used on thse years makes the perfect
> > adapter. Make sure the vapor recovery system (venting) is working
> properly
> > and that the charcoal canister is not about to dump the carbon and block
> > the
> > inlet tube. The replacement tank will not put up any fight at all for
> the
> > pump suction to collapse it. BTDT!
> >
> > Dennis
> >
> >
> >>From: Dan Barrett <dbx@POBOX.COM>
> >>Reply-To: Dan Barrett <dbx@POBOX.COM>
> >>To: vanagon@GERRY.VANAGON.COM
> >>Subject: fuel tank <-> pump diameter mismatch
> >>Date: Thu, 13 Dec 2007 00:13:38 -0500
> >>
> >>Volks,
> >> Just had a new fuel tank put in my 1990 GL because the old one was
> >> well
> >>rusted. I could've sworn that on my old tank, the diameter of the tank
> >>outlet and the diameter of the fuel pump inlet were equal -- it was a
> >>stretch of larger-diameter hose connecting the two.
> >>
> >> The new tank's outlet looks to be narrower than the old one's: the
> >> same
> >>diameter as the line coming out of the fuel pump, i.e. the 7mm (?) line
> >>that runs to the engine compartment. But that leaves me with hooking up
> >>the large-diameter fuel pump inlet to the small-diameter fuel tank
> >>outlet. The shop I took it to (a bunch of VW old-timers who work almost
> >>entirely on air-cooleds) fashioned some kind of adapter out of what
> >>looks like copper tubing and solder to mate the wide fuel pump line to a
> >>narrower bit of hose connected to the fuel tank outlet.
> >>
> >> I'd be laughing about it if it weren't leaking ever so slightly when
> >> the
> >>engine is off.
> >>
> >> So, now it's snowing out, my fuel system is slowly leaking onto the
> >>street, and I'm wondering what to do. I've never had anything between
> >>the fuel pump and the tank (like that weird box filter on Bentley
> >>20.26), so what on earth is going on here? What if I just put a length
> >>of 7mm hose over the fuel tank outlet pipe to build up its diameter, and
> >>then clamp the wider-diameter fuel pump line over that? Any guidance
> >>appreciated.
> >>
> >>Best,
> >>d.
> >>1990 GL -- "Mudskipper"
>
| 
