Foam on Heater Box Assembly - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 04-23-2013, 10:52 AM Thread Starter
 
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Foam on Heater Box Assembly

This foam is usually pretty dusty or torn over the years. Its on the main door that opens and closes just behind the heater core.

Anyone every replace this foam? Any suggestions on who may supply this part or recommend a good alternative to replace it with?

As always thank you.

JOSHUA
1970 GTO 455HO Cardinal Red
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post #2 of 4 (permalink) Old 04-23-2013, 08:54 PM
 
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Josh, during the initial stages of my 65 rebuild I decided to tear apart a heater box just to find out how they were built. At that point in time I was buying parts from all over the country. Long story short I had about 10 boxes. I picked a box at random and drilled out the spot welds. I was amazed at how filthy the inside was. Dirt, leaves, mouse droppings you name it. I took apart a few more hoping to find something cleaner, all the boxes were pretty ugly inside. I do not think that the condition of the box was specific to any geographic location as they were all pretty rough. I cannot recall what year of car that you are working on but I have to think that all the NON AC boxes are pretty much the same. I thoroughly cleaned up some usable parts and replaced the foam as much of the original was worn or missing. I do not recall the source but what you are looking for is a closed cell flexible foam at about a 1 -1.25 lb density. This type of foam is used in the refrigeration business and is similar to the outer foam jacket used on home AC lines. This type of foam is available in various thickness. In my heater box I have two flapper vent doors that required new foam. Plus a large horse shoe shaped gasket. Unfortunately to repair properly the whole box has to come apart, cleaned, re gasketed and welded. I have about 20+ pictures of the tear down and rebuild but is a huge file and not easily sent. After the repair my heater box works very well and the vent doors operate with very little effort at the dash heater controls.
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post #3 of 4 (permalink) Old 04-24-2013, 09:41 PM Thread Starter
 
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After taking another look it does seem pretty dirty. Im thinking of power washing it hoping that will take care of most of the cleaning as I'd not prefer to go as in depth as you did. Ill post some pictures of it when I'm done. Thanks for the lead of the foam source.


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JOSHUA
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post #4 of 4 (permalink) Old 04-27-2013, 10:21 PM
 
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Replaced all mine that I could get to without drilling. Ames sells a kit for like 15-20 bucks I think, worked great. Good luck!
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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