Heater core with A/C question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

718jwh · 09-02-2017, 11:56 PM

I am assembling my heater box with A/C and am wondering if there is any foam strips that go on the heater core or the box in the area where the core touches the box I don't remember if there was anything when I disassembled the old one. I am using a new aluminum heater core and was thinking there should be something between the aluminum core and metal piece it rest on in the box

Thanks
John

*randy500* · 09-03-2017, 12:36 AM

I think there is strip caulk around the edge of the heater core.

**71CHEVYSHORTBED402** · 09-03-2017, 12:55 PM

I only know of a gasket between the heater box and firewall. That's how I found it, but the heater core was replaced once before.

F.A.A.benny · 09-03-2017, 06:22 PM

I always use gum cord with these aluminum heater cores as they have more of a gap than the original Harrison heater cores had. If you look at the 5:25 mark on my video you can see some of the gum cord as I mentioned it while describing what was done to the heater box.https://youtu.be/F-07ekAClrM

09-02-2017, 11:56 PM	#1
718jwh Registered User Join Date: Dec 2014 Location: naperville Il Posts: 236	Heater core with A/C question I am assembling my heater box with A/C and am wondering if there is any foam strips that go on the heater core or the box in the area where the core touches the box I don't remember if there was anything when I disassembled the old one. I am using a new aluminum heater core and was thinking there should be something between the aluminum core and metal piece it rest on in the box Thanks John

09-03-2017, 12:36 AM	#2
randy500 Account Suspended Join Date: Jul 2016 Location: Tacoma, WA Posts: 6,873	Re: Heater core with A/C question I think there is strip caulk around the edge of the heater core.

09-03-2017, 12:55 PM	#3
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,120	Re: Heater core with A/C question I only know of a gasket between the heater box and firewall. That's how I found it, but the heater core was replaced once before. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

09-03-2017, 06:22 PM	#4
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: Heater core with A/C question I always use gum cord with these aluminum heater cores as they have more of a gap than the original Harrison heater cores had. If you look at the 5:25 mark on my video you can see some of the gum cord as I mentioned it while describing what was done to the heater box.https://youtu.be/F-07ekAClrM



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