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Harrison Heater Help
#1353745 Mon Apr 06 2020 06:53 PM
Joined: Jan 2017
Posts: 365
4
49 3100 Offline OP
Shop Shark
Did GM drill all needed holes in Firewall to mount the heater? Both mine have a bracket with male threads that go thru the firewall--I want to install in the 51 5 Window..Thanks Bill

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20180916_175626-001.jpg (40.92 KB, 204 downloads)
Re: Harrison Heater Help
49 3100 #1353802 Tue Apr 07 2020 12:00 AM
Joined: Jul 2019
Posts: 243
B
Shop Shark
I think so. All the ones i have seen have setups for at least the round core and usually also the fresh air style with the valve. For the round core look for the 2 holes in line vertically for the pipes to pass through and it should be a triangle hole configuration within them with the top of the triangle pattern pointing towards driver side.

Re: Harrison Heater Help
49 3100 #1353803 Tue Apr 07 2020 12:04 AM
Joined: May 2015
Posts: 2,285
K
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
I believe they did. The recirc heater with the round coil used the two hose holes spaced vertically quite a distance apart, and attached with 3 studs extending thru the firewall. See the attached pics. The fresh air heater may have used the holes toward the outboard side of the firewall with the fan motor sticking thru the firewall where the cover plate is in the pics. I'm not sure if there were also attaching studs going thru the firewall, but suspect there were. My firewall is peppered with holes in that area. (Not sure at the moment what they're all for.) There's also a pair of holes closely spaced vertically toward the center of the firewall, which may have been used for a different style heater (there were more than 2 types used.) Someone else will have to weigh in with a picture of the other heater styles.

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Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Harrison Heater Help
49 3100 #1354184 Thu Apr 09 2020 02:16 PM
Joined: Apr 2005
Posts: 8,540
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Moved to interior forum.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2)
‘39 Dodge Businessmans Coupe


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Re: Harrison Heater Help
49 3100 #1354375 Fri Apr 10 2020 01:07 PM
Joined: Jan 2020
Posts: 165
D
Shop Shark
Justhorsenround, I thought I posted a question regarding the AE Supreme heater, hammered bronze color with three chrome directional doors. Was this an after market heater? The firewall does not look like a pro installed it. 54 -3100. Ed


Currently making 1954 3100 better than new
Re: Harrison Heater Help
Doc.Hall #1354382 Fri Apr 10 2020 01:30 PM
Joined: Jan 2013
Posts: 1,684
Shop Shark
Originally Posted by Doc.Hall
Justhorsenround, I thought I posted a question regarding the AE Supreme heater, hammered bronze color with three chrome directional doors. Was this an after market heater? The firewall does not look like a pro installed it. 54 -3100. Ed

Sir, we separated your post and it is listed below this post in the interior forum. We didn’t want the information for the two heaters mixed up. If you have any questions please send me a message.

Chris

Re: Harrison Heater Help
49 3100 #1354460 Fri Apr 10 2020 10:00 PM
Joined: Sep 2006
Posts: 3,648
B
Shop Shark
I believe all the holes for the Air-Flow and recirculating types are pre-drilled or punched. NOS heaters come with directions and templates for installation as well, if a hole is needed they give exact dimensions.
https://www.flickr.com/photos/advance-design_parts_co/14237974312/in/album-72157631868452754/
https://www.flickr.com/photos/advance-design_parts_co/8129418873/in/album-72157631868452754/


Moderated by  ndkid275 

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