Date:         Tue, 8 Jun 2004 21:09:59 -0400
Reply-To:     Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject:      Re: Source for Exhaust Analyzer bung?
Comments: To: Tom Young <tomyoung1@COMCAST.NET>
In-Reply-To:  <000b01c44db6$e5eb3480$1302a8c0@comcast.net>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Tom

i did some research on this type of thing back in the winter when i wanted
to test a cat on a newer car with out a back pressure test port.  i think
that is what the port was for.  although it is labeled as a CO test
port in the manual.  since most exhaust gas analyzers "sniff"
after the cat they have taken this port out of most cars.  i ended up
taking the car to the local dealer and they don't even use the exhaust
gas tester any more.  they had to find the "old" guy in the shop to run
it for me.  they just us a laptop to read the output from the second
oxygen sensor on OBD II cars.  one guy that i talked to at a shop said
that bmw was the last to still put this port on their production cars.

any how in my research i found several kits to put a port in if you wanted
the port.  the were marketed to exhaust type shops.  the kits included the
drill and ports, perhaps 10 in a set.  i set out today to find some of
that info for you but instead turned this up.  it looks like most back
pressure testers are being made to fit a oxygen sensor bung.

http://www.arizonatools.com/catalog/browse/3586-3631-3348/

if you wanted to install a oxygen senor bung they are readily available
both on the web and at local muffler shops.  i bought one locally when i
fabbed my exhaust.  if you are going to do it yourself be sure to get the
plug that fits in the bung.  this prevents spatter from getting in the
bung while you are welding and i think helps to keep the bung from
warping.

jonathan

On Tue, 8 Jun 2004, Tom Young wrote:

> Hi all:
>
> The Federal air-cooled crossover pipe I purchased and installed on the
> Westfalia doesn't have the exhaust gas analyzer bung that the OEM crossover
> pipe did.  I'd like to install the bung on the aftermarket pipe; is there a
> source for these things?  As I recall the "bung" is nothing more than a
> smooth pipe, threaded on the end for a cap.  Could I just fabricate such a
> thing down at the hardware store?
>
> Thanks.
> ---------------------------------------------------------------
> Tom Young                       '81 Vanagon
> Lafayette, CA 94549         '82 Westfalia
> ---------------------------------------------------------------
>