Date: Fri, 22 Aug 2008 14:00:21 -0500
Reply-To: John Rodgers <inua@CHARTER.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Rodgers <inua@CHARTER.NET>
Subject: Re: Wrap exhaust pipes with fiberglass?
In-Reply-To: <045201c90486$8f786290$6401a8c0@PROSPERITY>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I wonder how effective coating the inside of the pipes with a ceramic
coating actually is.
John Rodgers
88 GL Driver
Scott Daniel - Turbovans wrote:
> good advice on the not wrapping them.
> ( and that was all baloney , especially the part about it getting hot
> and 'loosing compression.' )
>
> what I get super fine results out of .............for preserving the
> exhaust pipes at almost no cost.......
> I clean them, like hit them with a power wire brush.........like a
> hand held disc grinder, but with a wire brush on it........
> or even a small hand held wire brush to get in the small areas..
> - Then I just paint them with silver high temp exhaust paint in a
> spray can.
> They stay 'light gray' and not rusty for quite a long time that way.
> the brand I use, Dupli-Color claims to have ceramic something in it,
> and be good for up to 1,.200 degrees F.
> Sure works plenty good for not a lot of effort or expense for me ! (
> comes in red too, but silver is what looks right - it turns to light
> gray once cured )
> Scott
> turbovans
>
>
>
> ----- Original Message ----- From: "John Rodgers" <inua@CHARTER.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Friday, August 22, 2008 7:10 AM
> Subject: Re: Wrap exhaust pipes with fiberglass?
>
>
>> Bad Idea! Wrapping exhaust.
>>
>> The aft end of the Vanagon was designed and engineered to deal with the
>> heat of combustion and to get rid of it. The exhaust pipes hanging in
>> the breeze act as radiate heaters and transfer the heat to the passing
>> air when moving. At idle, there is not that much heat produced. We - men
>> - and Vanagons are much alike. Things hang out for cooling purposes.
>> It's a good system and it works. Tape it all up tight and you will get
>> heat damage of a different sort. Instead of excess heat radiating, the
>> contained heat will cook things from the inside out. Believe me, your
>> don't want your tubes cooked - on your Vanagon or otherwise.Rot sets in,
>> and repair is difficult at best and in some cases the only thing that
>> can be done is to remove them.
>>
>> John Rodgers
>> 88 GL Driver
>> Chelsea, AL
>>
>> Mark Hersh wrote:
>>> I was in Harbor Freight buying X-treme Tape (on sale for 3.99 USD till
>>> 8/25, BTW, save $1) and I mentioned to a guy in that aisle that it got
>>> high marks from folks on the Vanagon list serv.
>>>
>>> He said he used to own a Vanagon and said I can reduce heat in the
>>> engine compartment by 70% if I:
>>>
>>> Wrap the exhaust pipes (engine block to the cat) with fiberglass
>>> (using some kind of high-temp fiberglass stuff), securing with
>>> stainless steel wire, which in time will bond the whole shebang
>>> together. That helps to send the heat out the exhaust and, as the
>>> exhaust pipes will no longer act as radiators into the engine
>>> compartment, reduce engine overheating, heat stress on electrical
>>> components.
>>>
>>> I guess I can see the reduction of waste heat part in a general sense,
>>> but I am puzzled about the engine overheating part. I'd think that a
>>> properly running Vanagon's cooling system will keep the block and
>>> heads cool enough that the hot exhaust pipes won't add that much to
>>> their heat load...
>>>
>>> He made a particular point about engine overheating, saying, after a
>>> long trip, you slow down, engine overheats, you lose compression,
>>> etc... and that this will fix all that.
>>>
>>> My guess is that if that fixed or improved something for him, then he
>>> had something else wrong with his van. But I smiled and thanked him,
>>> as I wanted to beat the traffic home.
>>>
>>> Thoughts from the collective brain power of the list?
>>>
>>> Mark, "one week till road trip!"
>>>
>>> --
>>> 86 Campmobile Six-Seater "Monty"
>>>
>>> Black dogs are euthanized at a greater rate than other-colored dogs,
>>> regardless of temperament. Learn about Black Dog Syndrome at
>>> http://www.blackpearldogs.com/
>>>
>>>
>>>
>
>
>
| 
