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Old 01-23-2018, 05:02 PM   #1
Leatherback 57
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Default Heater to firewall

I have a 29 leatherback with an Autolite heater. What was used between inlet and manifold to seal? Attachment 34799615167444639781651204181.jpg
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Old 01-23-2018, 05:19 PM   #2
Dale G.
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Default Re: Heater to firewall

Nothing. The space between the manifold cover and the inlet in the firewall is supposed to be there to allow fresh air to combine with the heated air.
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Old 01-23-2018, 07:07 PM   #3
Gold Digger
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Default Re: Heater to firewall

I rap duct tape around mine
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Old 01-23-2018, 08:49 PM   #4
glenn in camino
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Default Re: Heater to firewall

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Originally Posted by Dale G. View Post
Nothing. The space between the manifold cover and the inlet in the firewall is supposed to be there to allow fresh air to combine with the heated air.
Good answer, Dale. Any connection that's not steel would probably rattle or burn up, or let bad air into the heat.
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Old 01-23-2018, 08:50 PM   #5
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Default Re: Heater to firewall

The guys in our club that have manifold heaters use a short piece of this:
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File Type: jpg SCAT hose.jpg (21.8 KB, 51 views)
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Old 01-23-2018, 11:22 PM   #6
Dick Carne
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Default Re: Heater to firewall

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I have used a short piece of radiator hose on mine. The rubber won't rattle, and there seems to a sufficient amount of outside air to avoid complications from engine odors, etc. Hope this will provide another perspectve.
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Old 01-26-2018, 09:34 AM   #7
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Default Re: Heater to firewall

I use a piece of chevy defroster vent tube tied with a hose clamp.
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Old 01-26-2018, 10:26 AM   #8
daren007
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Default Re: Heater to firewall

Scat tube from your local airport as CarlG shows. It is such a small piece they would throw it away. Most likely cost you nothing.
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Old 11-09-2020, 01:11 PM   #9
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Default Re: Heater to firewall

On the connection from the manifold heater to the body, I used a strip of that silicone grilling sheet that you use on the BBQ. It is flexible and seems to work well. Here is a very short video of it.

https://youtu.be/aUEdiPasUIY
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Old 11-09-2020, 01:30 PM   #10
Ed in Maine
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Default Re: Heater to firewall

I always have to have the windshield open to the "notch" to prevent getting head aches on long drives! I'm sure there must be a small amount of carbon monoxide under the hood and some seal at the fire wall is a good idea. Ed
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Old 11-09-2020, 08:22 PM   #11
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Default Re: Heater to firewall

Heat riser tubing for more modern cars available at any auto parts store !
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Old 11-09-2020, 09:20 PM   #12
CarlG
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Default Re: Heater to firewall

This is what most of the guys here use:
It's called SCAT hose (or tubing), comes in a variety of sizes, easiest place to get it is at your local aircraft supply house, or on line at Aircraft Spruce
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File Type: jpg SCAT hose.jpg (21.8 KB, 3 views)
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Old 11-09-2020, 09:59 PM   #13
Bill G
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Default Re: Heater to firewall

Quote:
Originally Posted by Jacksonlll View Post
On the connection from the manifold heater to the body, I used a strip of that silicone grilling sheet that you use on the BBQ. It is flexible and seems to work well. Here is a very short video of it.

https://youtu.be/aUEdiPasUIY

I have used the soda can method but it rattles a bit. Actually, it just joins in the chorus of other rattles.

I will have to try the BBQ silicone sheet method. Thanks.
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Old 11-09-2020, 10:17 PM   #14
Herb Concord Ca
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Default Re: Heater to firewall

Years ago when I had mine, I used a length of radiator hose to close the gap.
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Old 11-10-2020, 08:28 AM   #15
jwilliams81
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Default Re: Heater to firewall

As a previous poster said, I leave that gap there. There is more then enough heat to come into the cabin, and it lets fresh air mix with the heated air.
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