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12-26-2021, 10:02 PM | #1 |
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Join Date: Jul 2009
Location: tucson az
Posts: 34
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a/c / heater box question
I am doing the heater core and evaporator in my truck along with rebuilding the box with new seals and washing everything, I have pulled the inner and outer boxes off the firewall and have a question pertaining to the sealer the factory used on the seams where the outer box meets the firewall, I am talking about the black "spray foam" not the strip calk. Anyway, the guy that did mine went to town and got that black spray foam crap everywhere on the box and I'm trying to clean it off. Does anyone know what takes that crap off?
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1979 K10 Silverado SWB 1981 K30 Scottsdale Crew Cab SRW 1988 v30 Silverado single cab DRW 1991 K20 Suburban barn door |
12-26-2021, 10:31 PM | #2 |
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Location: tucson az
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Re: a/c / heater box question
since foam and gas don't mix well, I was going to give that a tomorrow
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1979 K10 Silverado SWB 1981 K30 Scottsdale Crew Cab SRW 1988 v30 Silverado single cab DRW 1991 K20 Suburban barn door |
12-26-2021, 10:48 PM | #3 |
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Join Date: Dec 2011
Location: WA
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Re: a/c / heater box question
Why are you taking the box out? Was it leaking?
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12-27-2021, 12:34 AM | #4 |
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Join Date: Jul 2009
Location: tucson az
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Re: a/c / heater box question
Read the first words of the first post,
I'm replacing and fixing everything, but that doesn't matter to the question at hand.
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1979 K10 Silverado SWB 1981 K30 Scottsdale Crew Cab SRW 1988 v30 Silverado single cab DRW 1991 K20 Suburban barn door |
12-27-2021, 12:45 AM | #5 |
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Location: Oklahoma City, OK
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Re: a/c / heater box question
If the 'black spray foam' is any relation to the insulation foam in a can, I haven't found anything solvent wise that takes it off. It takes about a week before bits on fingers will finally let go. I have a project shirt that got some around a button. Still there many years and washings later. For your heater box, a razor blade scraper might work.
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12-30-2021, 11:09 PM | #6 |
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Join Date: Feb 2010
Location: Gretna, NE
Posts: 33
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Re: a/c / heater box question
I used some high temp paint reducer and a plastic putty knife. It didn’t dissolve it, but it did soften it up a little. Lawyer thinner might work too, at least on the box.
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