I used a product for Eastwood that is like Dynamat, but cheaper and when you go to Ebay to by it...there is an ebay deal in autions that makes it even cheaper then ordering it direct form them! I set almost did the whole car. Just a panel of two short from doing the whole interior , so I ordered a second set and used the rest for my boat engine area.
Vette(s): '78 Silver Anniversary T Top coupe,58k orig miles.
THM350 auto, 350 L48, JBM headers,Oyster White interior,.as of Nov '15 in process of painting.
Extra insulation will help and now's the time to add it intelligently..
Another couple things you can do is verify that the air control system that is SUPPOSED to shut the hot water down
in the heater hose actually is working..It's inder the hood, passenger side in line in the heather hose and attached with a couple hose clamps with the air-pneumatic line attached..
IF the heater hose between that valve critter in the heater hose line stays HOT with the heater OFF, chances are either the control assembly( less than 20 dollars at an auto parts store and 20 minutes to install) or perhaps the heater switch and associated controls need attention..latter being more costly as one has to get into the console to access that starting place..
One poster said he actually put a manual shut off valve in line in his heater hose run so he could insure NO hot radiator water was getting to the heater during warm months..Jim
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