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06-27-2020, 09:24 AM | #1 |
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Join Date: Apr 2019
Location: Mt. Pleasant, SC
Posts: 601
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Firewall Insulation
Looking online, I see a number of insulating and sound barrier materials are available.
Can anyone recommend a product that would work well on the firewall under the gas tank ? Thanks - Jim |
06-27-2020, 10:26 AM | #2 |
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Join Date: Jun 2015
Posts: 1,414
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Re: Firewall Insulation
My car has the plastic black insulated cover mounted inside by prior owner. It appears to have more temp. insulating qualities than sound. It limits easy access to the indented firewall fuel port and a few other areas screws, etc., and fits and looks OK unpainted.
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06-27-2020, 10:29 AM | #3 |
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Join Date: May 2010
Location: Young Harris, GA
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Re: Firewall Insulation
Get the hard molded insulator panel. It looks really good when you are done. There are also "holes" (passages) in the body that let hot air up into the cowl kickpanel areas that you will want to seal. Use a bright light under the hood to find them. And seal around the column and pedals as best you can to keep hot air out.
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Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
06-27-2020, 11:42 AM | #4 |
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Re: Firewall Insulation
How does the molded panel attach to the firewall ?
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06-27-2020, 11:52 AM | #5 |
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Join Date: May 2010
Location: Young Harris, GA
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Re: Firewall Insulation
They give you longer versions of all of the screws that go into the firewall from the inside. You replace existing with longer ones through panel. I also put longer screws in mine going from the engine side, then put nut/washer on them inside. They also have small brackets in the upper left/right corners that hold those corners in.
It's pretty stiff molded plastic, so it does not take a lot to keep it up there.
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Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
06-27-2020, 11:55 AM | #6 |
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Re: Firewall Insulation
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Last edited by Dick M; 06-27-2020 at 12:01 PM. |
06-27-2020, 12:32 PM | #7 |
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Location: Glide, Oregon
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Re: Firewall Insulation
Jim, what would you recommend using to insulate in the kick panel areas? I have the firewall insulator and jute fiber under the carpet.
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Ruth "Sometimes you really DO need to read the whole thread" |
06-27-2020, 04:39 PM | #8 | |
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Location: Young Harris, GA
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Re: Firewall Insulation
Quote:
Use a light under the hood, under the car body, in a dark building to look for light leaks inside the car. These are hot air leaks. Then, between the metal body and the inside kick panel, use whatever thermal insulation you like. I put a layer of Dynamat on the metal for a bit of sound deadening, followed by a piece of fiberglass batting cut to fit.
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Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
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06-27-2020, 04:41 PM | #9 |
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Join Date: Apr 2019
Location: Mt. Pleasant, SC
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Re: Firewall Insulation
Jim/GA, Dick M - thanks for the information. I’ve ordered an insulator panel...the SC Lowcountry summer is uncomfortably warm in my Model A.
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07-02-2020, 05:38 PM | #10 |
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Join Date: Apr 2019
Location: Mt. Pleasant, SC
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Re: Firewall Insulation
Wow ! I should have installed the firewall insulation panel long ago. What a difference ! I think 75% of the heat is gone, and it’s noticeably quieter inside the car as well. I still have some heat coming from the lower cowl panel area, but have an insulation kit from quietride.com ordered.
Thanks for all the advice ! Jim |
07-03-2020, 09:36 AM | #11 | |
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Join Date: Aug 2018
Posts: 2,332
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Re: Firewall Insulation
Quote:
Any down side to sealing the leaks/holes with judicious (minimal) use of spray foam before adding foam blocks and insulation/sound deadening?? Do rodents like the spray foam, and other reasons? |
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07-03-2020, 12:05 PM | #12 | |
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Join Date: May 2010
Location: Young Harris, GA
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Re: Firewall Insulation
Quote:
I have had things shipped to me where they sprayed the foam inside a plastic bag pressed in between the item and the box. That contains the foam in the bag, so it does not stick to the item, but provides the desired cushion. Something like that might work. Then the foam would conform to the space but not stick to everything. I have not tried that.
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Jim Cannon Former MAFCA Technical Director "Have a Model A day!" |
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