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Date:         Tue, 22 Jul 2008 12:54:33 -0700
Reply-To:     Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Subject:      Re: The DEEP, DARK secret of fiberglass exhaust wrap discovered
Comments: To: Doug Alcock <doug.alcock@gmail.com>
In-Reply-To:  <1ed6d210807221226k6ac6b5fx84343f896093f6b8@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Those pipes are just mild steel with paint.

On Tue, Jul 22, 2008 at 12:26 PM, Doug Alcock <doug.alcock@gmail.com> wrote:

> Ok - I thought they were stainless steel -- but will sit corrrected -- > living proof that you have take what you see on this list with a grain of > salt --- my apologies for the waste of bandwidth and the misinformation. > > Doug > > > On 7/22/08, Scott Daniel - Turbovans <scottdaniel@turbovans.com> wrote: > > > > tryin' to stay quiet pretty much, > > but since when do 83.5 to 85 Vanagons have stainless steel main coolant > > pipes ? . > > > > what they are, near as I can tell is ordinary steel, galvanized, then > > painted black. > > and a magnet sticks to them - just tested that. > > ( hush my mouth if I'm wrong, but boy are there ever a lot of incorrect > > urban myths in the VW world !! ) > > > > there are numerous stainless steel alloy types - a lot of stainless steel > > is non-magnetic. > > > > I'm glad to see someone say stainless rusts though .........and it > depends > > on which kind of stainless........ > > but people think stainless steel is 'magic titanium.' > > it is not. > > stainless has a lot of properties that make it not as good as steel in > many > > applications. > > it's not as strong. > > it welds nicely, but it doesn't cut with a torch so nicely, and it's very > > hard to drill. > > Stainless steel cracks too. it's not 'some perfect metal.' > > ................and ............stainless steel coolant pipes are a very > > good application of the material, and to be really correct, which should > be > > saying what alloy of stainless we are talking about each time. > > > > > > > > > > > > ----- Original Message ----- From: "Doug Alcock" <doug.alcock@GMAIL.COM> > > To: <vanagon@GERRY.VANAGON.COM> > > Sent: Tuesday, July 22, 2008 7:04 AM > > Subject: Re: The DEEP, DARK secret of fiberglass exhaust wrap discovered > > > > > > Stainless steel does rust eventually --- a case in point is the stainless > >> steel coolant pipes that run under the 83.5 to 85 vanagons. I'm sure you > >> can > >> guess how I know this. > >> > >> Cheers, > >> Doug > >> > >> > >> On 7/21/08, Chris S <szpejankowski@gmail.com> wrote: > >> > >>> > >>> Well, I bought some exhaust wrap, but not to wrap my exhaust, mind you. > I > >>> needed to shield some not-so-hot parts from the hotter-than-H parts. > I've > >>> read reports of exhaust headers rusting very quickly after application > of > >>> fiberglass exhaust wrap. Why? The stuff soaks up water like a sponge > >>> and > >>> holds it. Yes, I just tested it. So you can imagine what happens over > >>> night when the dew point drops, no? Yes. The doom of all bare steel, > >>> moisture, gets sucked up against the headers. > >>> > >>> It seems that sealing it against moisture would be the correct way to > >>> apply > >>> the stuff, which can be done by applying the appropriate and expensive > >>> sealant. > >>> > >>> No problem for stainless steel headers, right? Maybe not so, since the > >>> wrap > >>> causes the temperature of the headers go up, which may be too much of > >>> heat > >>> stress for the metal to handle. And that might be another DEEP, DARK > >>> secret > >>> in itself. > >>> > >>> Chris S. > >>> > >>> > >> > >> > >> -- > >> http://www.dougalcock.com > >> > > > > > > > -- > http://www.dougalcock.com >

-- Jake 1984 Vanagon GL 1986 Westy Weekender "Dixie" Crescent Beach, BC www.crescentbeachguitar.com http://subyjake.googlepages.com/mydixiedarlin%27


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