In the final stretches of getting my 87 SR5 4R back on the road. I've had the dash apart for a couple years as it sat in the garage and now that it's mechanically sound, I'd like to clean up the heating and air system. I've pulled apart the ducts and chambers, all except for the Evap, leaving that be for now. Going to replace the resistor and put in new foam gasket around the ducts and heater core. But what about the disintegrated foam on the various flappers/doors. The stuff just crumbles to dust when looked at the wrong way. I want to replace it, though maybe I could just scrap it all off and vacuum clean leaving the doors bare metal? Would that cause a noticeable difference in the operation?

What should I use to replace the old foam on these doors? I've been looking into neoprene sheets that I could cut to size and glue on. I figure I'm in here now, might as well make it bomb proof. Would neoprene be the way to go? Foam seems to have a shorter life span.

What about the heat resistance? I understand that heater core can get over 200 degrees. If I wrap the heater core/door with new foam/neoprene/etc it could melt if I use the wrong material. Then there's the adhesive question. What adhesive should I be using that will stand up to the heat and not compromise the material it's sprayed on?

 

I've seen rolls of foam tape at home depot, the kind with the peel off backing.

I think just clean the surface with alcohol and press for 30 seconds for a permanent bond.

If you can't find what you want in a roll, cutting strips of foam and using 3M spray trim adhesive on one side of it shoukd work well too.

 

I thought about the foam tape roll option, figured it be easier to cut a sheet of material to shape and spray with 3M 80 or 90. But you're thinking foam again? Neoprene was sounding pretty good. Seemed better than foam in many ways.

 

this is how I did mine ... https://www.yotatech.com/forums/f209...5/index49.html

I know this tape is not "rated" for 220* .. but I don't think stock was either


.

 

Nice thread man. What did you do about the foam on the doors?