The heater-duct- flappers

[jzjames]

Who’s got a suggestion for what I could use to replace the soft pads that were glued to the heater flaps?

When my heater core blew out a few years ago and I had to replace, I cleaned up the entire box. Those soft pads pretty much just brushed off of the flaps - they looked like some kind of thin foam..

Now I have pretty considerable air leakage past the flaps when theyre closed. Too hot!
Whatever goes back on has to be able to hold up to the heat.

[sargentrs]

Factory heater replacement foam kits should still be available from LMC or DC. However, when I rebuilt my factory A/C, foam kits were not available for it. I used Armaflex adhesive backed strip from Home Depot. It's in the HVAC section. Heat and moisture resistant and soft enough to make a good seal. You can see it applied half way down page 3 and on page 4 on my A/C rebuild thread. http://www.fordification.com/forum/view ... 3&start=30 Here it is on the HD website. https://www.homedepot.com/p/Armacell-2- ... /100539553

[jzjames]

Armaflex. Check.
Writing it down in my Ford folder til I can get to this project. Wonder if I’ll have to disassemble alot.

[390FE1972]

You have to take the back metal plate off to get to the flappers, which requires removing the rivets that hold the front "plastic" and the back metal piece together. I did a complete rebuild on mine using the Dennis Carpenter rebuild kit, in my opinion you might as well do it all right all at once. I used small machine screws and nuts to replace the rivets. Here is Randy's excellent thread on rebuilding the heater box, and the link to the DC rebuild kit:

http://www.fordification.com/forum/view ... =6&t=73960
https://www.dennis-carpenter.com/trucks ... -fresh-air

Regards

[sargentrs]

Thanks 390FE1972! I'd forgotten about that

[jzjames]

Thanks for the help.
I should have done the full rebuild when I had it out for the heater core.

[basketcase0302]

I used a thin rubber type insulation like Armaflex when i did my complete rebuild but can't remember the source of if it was something Zi had laying around?