Date: Fri, 11 May 2012 20:38:32 -0400
Reply-To: David Clarkson <dvdclarksn@AOL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Clarkson <dvdclarksn@AOL.COM>
Subject: Re: 2.1 Exhaust. P. 26.9 Bentley: "5 Diaphragm Springs" ?
In-Reply-To: <4fa81a2f.d1b9e00a.29e1.5cad@mx.google.com>
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I just ordered a set to redo my 2.1 1990 exhaust with new to me parts exhaust pieces so mine will pass the Va. state inspection. I ordered a hardware set from Van Cafe. They call them "wavy washers". VC specifies several places that they are used but Bentley 26.9 shows them on one of the bolts(probably just show on one of the three for illustration purposes and they are actually on all three bolts) on the pipe that goes from the connector pipe to the cat in a fashion that works like a spring to allow for body flex. Not having these on my last aftermarket setup caused the flexing to occur on the inpipe of the muffler and subsequently a premature failure there. I also will be trying to use or replicate all of the support on the left side (1/3 manifold I believe). My overpriced aftermarket exhaust had poor/no support and failed at the welded points due to the normal Vanagon vibrations. Anyone got a decent used 1/3 stock exhaust manifold that they could sell. Reason for used is cost and also feel that in 1-2 years I will go Zetec.
David Clarkson
1990 Westy
stock powerplant and tranny for now
-----Original Message-----
From: David Beierl <dbeierl@ATTGLOBAL.NET>
To: vanagon <vanagon@GERRY.VANAGON.COM>
Sent: Mon, May 7, 2012 3:29 pm
Subject: Re: 2.1 Exhaust. P. 26.9 Bentley: "5 Diaphragm Springs" ?
At 01:15 PM 5/7/2012, neil n wrote:
>Image:
>https://lh6.googleusercontent.com/-0tqzGn0WwFE/T6gB740u5eI/AAAAAAAAFuM/0vRYhIVlLd0/s576/cadmium%2520plated%2520%253F.jpg
Always hard to tell from photos on monitors, but that looks like a
copper-plated nut to me. Cadmium (nasty toxic stuff) tends to a
light-yellow color. Here's Febi's take on the subject:
http://www.germansupply.com/home/customer/product.php?productid=16355
I bought a box of 100 for not a whole lot more than that from my
local truly friendly imported auto specialist a few years back. They
weren't as fancy as the Febi ones, though. Nice heavy copper,
thicker than I would have called "plating."
Solid brass has been recently put forward here as the aviation answer.
The concave washer p/n is 025 251 200, dunno if still available from
VW. Out in the Real World it's called a Belleville Washer (see
http://en.wikipedia.org/wiki/Belleville_washer )* and you can get
them from lots of places including Belleville themselves (in
England). Might have to do some calculating to figure out what spec
you need that would flatten out with normal torque on an M8x1.25 nut
though, or whether VW wanted one that would actually not completely
flatten and would give a little flexibility in the joint. Getting
hold of an original would help a lot.
*These are on my list as one of the cleverest inventions in the universe...
Yours,
David
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