Date: Tue, 22 Jul 2008 12:55:54 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: The DEEP, DARK secret of fiberglass exhaust wrap discovered
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hey , no big.
any expectation that accuracy will be present more than say, 60 % of the time, or clear wording and discriptions of what's being posted about .........I'd have to say that's an unreasonable exspectation !!
i don't think it was a waste of bandwidth if anyone learned something.
----- Original Message -----
From: Doug Alcock
To: Scott Daniel - Turbovans
Cc: vanagon@gerry.vanagon.com
Sent: Tuesday, July 22, 2008 12:26 PM
Subject: Re: Re: The DEEP, DARK secret of fiberglass exhaust wrap discovered
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
