Date: Mon, 16 Aug 2004 13:49:16 -0400
Reply-To: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject: Re: coolant hose number
In-Reply-To: <004401c4835d$35f0fec0$06caa8c0@karmannghia.comn>
Content-Type: TEXT/PLAIN; charset=US-ASCII
okay here is the data i have assembled from the postings on this matter.
does anyone have data on the pressure ratings for the 7mm hoses list? in
particular i used the N 20 357 1 hose for the coolant system. is it
strong enough for that application or another way to put it is that what
vw calls for on the hose that goes from the bleeder on the firewall to
the cross over pipe? i understand i could take it off an put N 20 281 1
on there but if the N 20 357 has a high enough pressure rating i would
like to leave well enough alone :).
Hoses
Inside Dia. Part # / Description /
3.5mm N 20 353 1 Black Vacuum Gas
4.5mm N 20 361 2 Red Vacuum Diesel
5.0mm N 20 355 1 Black Fuel Hose
7.0mm N 20 357 1 Black Fuel Hose 7x2.5, 7mm ID,
12mm OD, fuel vapor recovery hose (braided jacket)
7.0mm N 20 281 1 Black Smooth Fuel Hose 7x3, 7mm ID,
13mm OD, fuel injection fuel hose (smooth jacket,
reinforced internally)
7.0mm N 903 397 02 Black Smooth Fuel Hoes (this hose is an
improved upgraded version of N 20 281 1 for use in
engine compart.)
9.0mm N 20 359 2 Brown Fuel Hose
12mm N 20 374 1 Black Fuel Hose, Aux Air Regualtor
14mm N 20 371 1 Black Fuel Hose
15mm N 20 363 1 Black Fuel Hose
17mm N 20 370 1 Black Fuel Hose
jonathan
On Sun, 15 Aug 2004, Jim Thompson wrote:
> The N 20 357 1 (7mm Hose) mentioned below by dvwimportautoparts.com is
> incorrect for VW models running L-Jet/Digijet/Digifant Fuel Injection which
> is used on Bay Window Buses, 74 412s and our beloved Vanagons (Air or Water
> Cooled) due to the slightly higher fuel pressure as opposed to D-Jet Fuel
> Injection on the Type 3 and Early Type 4.
>
> Volkswagen introduced a higher pressure rated 7mm hose which is better
> reinforced and has a smooth covering, VW # N 20 281 1. This is generally
> what Continental/CRP USA distributes through the major importer/warehouses
> these days and is far superior in strength, durability and longevity to the
> earlier cloth covered "357" hose. Several years ago, VW even went further
> by introducing an improved hose for higher temperature use in the engine
> compartment of the Vanagon under the part number N 900 253 19, which was
> subsequently superseded to N 903 397 02, which is the current offering at
> Volkswagen. This latest variety isn't cheap either, as for example Bus
> Depot sells it for $27.02 (I assume per meter [just over 3 feet] length) and
> I'm sure it's more $$ at Volkswagen.
>
> VW, even though they still list the N 20 357 1 hose in their price list,
> upgraded (?) to part number 443 121 107 A to be used with FI systems in the
> Type 3 and 71-73 Type 4 engine compartments several years ago. Note that
> it's a Group 121 (Water Cooled Component) part number, which is weird
> considering most coolant hoses are not manufactured in fuel resistant
> materials such as neoprene or buna. This part apparently is fuel resistant
> or it could be a HUGE mistake on Volkswagen's listing in ETKA. My database
> also shows it to be the coolant overflow hose number for Audi/Volkswagen
> water cooled applications (strangely, the Vanagon is not listed in the
> application database I have).
>
> I currently use (and have used for the past 7 years,) the N 20 281 1 hose
> throughout the fuel system and the Bypass Hose and Coolant Expansion Tank to
> Refill Tank Hose mentioned by Jonathan Farrugia. Because of heavy useage in
> the course of on-going mobile living in my Westy, I replace the fuel hoses
> in the engine compartment every two to three years.
>
> Jim Thompson
> 84 Westfalia 2.1 "Ole Putt"
> oldvolkshome@earthlink.net
> jim@karmannghia.com
> http://www.oldvolkshome.com
> ***********************
> ----- Original Message -----
> From: "Don Deitke" <DVWImports@AOL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Sunday, August 15, 2004 6:01 PM
> Subject: Re: coolant hose number
>
>
> > Various Hose Sizes for VW Applications
> > >From Don @ DVW Import Auto Parts
> > www.dvwimportautoparts.com
> >
> > Save in your Favorites or Book Mark for Future Reference
> >
> > Inside Dia. Part # / Description /
> > 3.5mm N 20 353 1 Black Vacuum Gas
> > 4.5mm N 20 361 2 Red Vacuum Diesel
> > 5.0mm N 20 355 1 Black Fuel Hose
> > 7.0mm N 20 357 1 Black Fuel Hose
> > 9.0mm N 20 359 2 Brown Fuel Hose
> > 12mm N 20 374 1 Black Fuel Hose
> > 14mm N 20 371 1 Black Fuel Hose
> > 15mm N 20 363 1 Black Fuel Hose
> > 17mm N 20 370 1 Black Fuel Hose
> >
> > www.dvwimportautoparts.com
>
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