Re: Re[2]: Type III heating system insulation

[jadney@vwtype3.org (Melissa & Jim)]

>From: Theo Thepen <thepen@pi.net>

>The asbestos is covered on the outside only. It's not a cloth but a 
>cardboard type of material. I'm also a purist and my heaterboxes are NOS 
>and, like Aaron's, well protected from rust from the outside (zinc 
>plated). The main problem with the heater boxes is, like with the 
>exhaust, rust from the inside. The old insulation material starts to 
>flake when old. Not all cars had the insulation btw. I think it was only 
>in countries with a colder climate. As many of the type 3's and all the 
>notches and KG34 now living in the States were bought in Germany they 
>were equipped with the insulation. My KG34 has (now had) this material 
>round the steel tube running from the large heater boxes to the mixer 
>boxes also.

In the US, the heat exchangers stopped having the insulation in 73.  I had 
always assumed this was done in the name of economy, just as many of the 
other 73 parts were cheapened (thinner sheet metal in some places.)

The insulation on the flex tubes between the heat exchangers and the mixer 
boxes is definitely different:  It is many layers of fiberglass cloth, faced 
on the outside with a grey cloth/vinyl(?) and bound and stitched around all 
four edges with the same material.

Jim
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       Melissa Kepner                                    Jim Adney
       jadney@vwtype3.org              jadney@vwtype3.org
                             Laura Kepner-Adney
                             Madison, Wisconsin
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