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On 22 Sep 2004 at 11:34, Gamboa, Gary wrote: > Is there a recommended replacement for the wrapping material > that came with OE lower heat exchangers? Is this wrapping > even necessary, other than for absorbing oil. It is nothing more than thermal insulation, to insure that as little heat as possible is lost thru the outside wall of the HE. This maximizes the amount of heat that can actually be delivered inside the car. '73s and replacement HEs actually came without ANY insulation on them. > So the result would be cooler air into the car for heating. Would this > have a negative impact on engine operation? No. No effect on the engine at all. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~