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