Heater Core Removal - 64 C-10 - Thrift Air - The 1947 - Present Chevrolet & GMC Truck Message Board Network

elane352 · 11-20-2016, 12:07 PM

Greetings,

I have reviewed several heater box removal threads and was hoping to get the info I needed from them and not have to bother anyone with another posting on this topic. Well I have hit a minor snag and just wanted to make sure that I am interpreting things correctly.

I believe that LILRED66 mentioned in a prior posting that in addition to removing the 5 hex lag bolts that secure the box to the frame, one has to also remove 2 speed nuts from inside the cab.

I have removed the engine bay lag bolts. The right side of the unit (as I face the front of the truck) appears free. I can see a threaded bolt trying pull out of the back right side of the box which is coming from through the firewall. So my gut is telling me nothing was actually holding that bolt in place.

The left side is different. Something is clearly preventing the left side of the box from freeing up to be pulled out. So I am thinking there is some kind of similar nut/bolt on that side. Am I right here? Just wanted to verify that on a 64 there are two speed nuts or bolts or something that I have to undo. If this is right just let me know.

I must be blind since I am not seeing this left side nut/bolt when I get inside the cab. Given the firewall insulation pad I installed a few months ago, I am wondering if the padding is covering the bolt/nut from the inside. I have started to pull back the padding to see what I can find and will continue to do so.

I also undid the 3 small hex bolts used to mount the inside defroster/heater unit to the inside portion of the firewall. I figured that was not going to resolve my problem. And of course it did not.

Any advice would be appreciated. I hope to avoid peeling back too much of my insulation.

Eddie

Sm zi

Eddie

**The Rocknrod** · 11-20-2016, 03:04 PM

This may help, there is one near the center of the cab labeled Heater Box.

elane352 · 11-20-2016, 05:55 PM

Master Chief,

Sir - I hear you and understand the diagram. The right side, which is the area I believe you circled, is free and able to move for me. The resistance I am getting is on the left side.

Eddie

**The Rocknrod** · 11-20-2016, 10:33 PM

I'd send you a larger pic but you cant sent a pic via PM and the pic I attached for some reason doesnt come out very large.

**DPowers** · 11-20-2016, 11:32 PM

These pics help any?

**Captainfab** · 11-21-2016, 01:06 AM

That is a recirculating heater not a Thrift Air heater.

Quote:

Originally Posted by DPowers

These pics help any?

**Captainfab** · 11-21-2016, 01:08 AM

Sometimes I find it easier to remove the top of the heater box. The part that was attached with the lag bolts. Then the rest will come away from the firewall easier.

Quote:

Originally Posted by elane352

Master Chief,

Sir - I hear you and understand the diagram. The right side, which is the area I believe you circled, is free and able to move for me. The resistance I am getting is on the left side.

Eddie

ACK · 11-21-2016, 02:18 PM

Yes, you got to get under the dash and remove nuts, here's a link for ya' that might help ... http://67-72chevytrucks.com/vboard/s...d.php?t=635135

urmyboyblue · 11-21-2016, 02:40 PM

I thought that the recirculating heater was the thrift air heater. If it is not, what does the thrift air look like? Is it the two piece with one in the cab and one in the engine compartment?

ACK · 11-21-2016, 03:38 PM

Quote:

Originally Posted by urmyboyblue

I thought that the recirculating heater was the thrift air heater. If it is not, what does the thrift air look like? Is it the two piece with one in the cab and one in the engine compartment?

If you haven't read this thread, it should provide everything you could possibly want to know about '60 - '66 Chevy pickup heaters ... http://67-72chevytrucks.com/vboard/s...d.php?t=488618

jtrichard · 11-21-2016, 04:27 PM

This is all you wanted to know about heaters but were afraid to ask (excerpt from link above )

"As far as I know there are 4 heater options 60-66 chev and gmc."
1) no heater: firewall delete plates- 60-66 (upper delete plate is the same all years, lower is 60-61, and then 62-66)
2) cheap heater: "recirculating", core and fan inside cab- 60-63
3) cheap heater: "thrift-air", same as deluxe, smaller core but only 1 knob for fan and air.-64-66
4) deluxe heater: "deluxe", core and fan in engine compartment.-60-66

elane352 · 11-21-2016, 09:17 PM

All,

Cannot thank you enough for the information, links, and pictures. I will get this done.

Waiting to get my new electric fan too so that I can burp the system also.

Much appreciated!

Eddie

elane352 · 12-26-2016, 07:26 AM

By the way, I did get the heater box off, got the rust removed, painted the box, and installed a replacement heater core. Thanks again.

Eddie

11-20-2016, 12:07 PM	#1
elane352 Registered User Join Date: Jul 2014 Location: Bowie, Maryland Posts: 82	Heater Core Removal - 64 C-10 - Thrift Air Greetings, I have reviewed several heater box removal threads and was hoping to get the info I needed from them and not have to bother anyone with another posting on this topic. Well I have hit a minor snag and just wanted to make sure that I am interpreting things correctly. I believe that LILRED66 mentioned in a prior posting that in addition to removing the 5 hex lag bolts that secure the box to the frame, one has to also remove 2 speed nuts from inside the cab. I have removed the engine bay lag bolts. The right side of the unit (as I face the front of the truck) appears free. I can see a threaded bolt trying pull out of the back right side of the box which is coming from through the firewall. So my gut is telling me nothing was actually holding that bolt in place. The left side is different. Something is clearly preventing the left side of the box from freeing up to be pulled out. So I am thinking there is some kind of similar nut/bolt on that side. Am I right here? Just wanted to verify that on a 64 there are two speed nuts or bolts or something that I have to undo. If this is right just let me know. I must be blind since I am not seeing this left side nut/bolt when I get inside the cab. Given the firewall insulation pad I installed a few months ago, I am wondering if the padding is covering the bolt/nut from the inside. I have started to pull back the padding to see what I can find and will continue to do so. I also undid the 3 small hex bolts used to mount the inside defroster/heater unit to the inside portion of the firewall. I figured that was not going to resolve my problem. And of course it did not. Any advice would be appreciated. I hope to avoid peeling back too much of my insulation. Eddie Sm zi Eddie

11-20-2016, 03:04 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Heater Core Removal - 64 C-10 - Thrift Air This may help, there is one near the center of the cab labeled Heater Box. Attached Images __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

11-20-2016, 05:55 PM	#3
elane352 Registered User Join Date: Jul 2014 Location: Bowie, Maryland Posts: 82	Re: Heater Core Removal - 64 C-10 - Thrift Air Master Chief, Sir - I hear you and understand the diagram. The right side, which is the area I believe you circled, is free and able to move for me. The resistance I am getting is on the left side. Eddie

11-20-2016, 10:33 PM	#4
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Heater Core Removal - 64 C-10 - Thrift Air I'd send you a larger pic but you cant sent a pic via PM and the pic I attached for some reason doesnt come out very large. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

11-20-2016, 11:32 PM	#5
DPowers One foot in front of the other Join Date: Aug 2008 Location: Parrottsville, TN Posts: 5,426	Re: Heater Core Removal - 64 C-10 - Thrift Air These pics help any? Attached Images __________________ DP's 66 Build http://67-72chevytrucks.com/vboard/s...d.php?t=361556

11-21-2016, 02:18 PM	#8
ACK Registered User Join Date: Oct 2012 Location: Philly, PA Posts: 535	Re: Heater Core Removal - 64 C-10 - Thrift Air Yes, you got to get under the dash and remove nuts, here's a link for ya' that might help ... http://67-72chevytrucks.com/vboard/s...d.php?t=635135 __________________ My truck ain't dead, it just smells funny.

11-21-2016, 02:40 PM	#9
urmyboyblue Registered User Join Date: Feb 2015 Location: Montevallo, AL Posts: 272	Re: Heater Core Removal - 64 C-10 - Thrift Air I thought that the recirculating heater was the thrift air heater. If it is not, what does the thrift air look like? Is it the two piece with one in the cab and one in the engine compartment?

11-21-2016, 04:27 PM	#11
jtrichard Registered User Join Date: Jun 2013 Location: joshua tree ca. Posts: 1,484	Re: Heater Core Removal - 64 C-10 - Thrift Air This is all you wanted to know about heaters but were afraid to ask (excerpt from link above ) "As far as I know there are 4 heater options 60-66 chev and gmc." 1) no heater: firewall delete plates- 60-66 (upper delete plate is the same all years, lower is 60-61, and then 62-66) 2) cheap heater: "recirculating", core and fan inside cab- 60-63 3) cheap heater: "thrift-air", same as deluxe, smaller core but only 1 knob for fan and air.-64-66 4) deluxe heater: "deluxe", core and fan in engine compartment.-60-66

11-21-2016, 09:17 PM	#12
elane352 Registered User Join Date: Jul 2014 Location: Bowie, Maryland Posts: 82	Re: Heater Core Removal - 64 C-10 - Thrift Air All, Cannot thank you enough for the information, links, and pictures. I will get this done. Waiting to get my new electric fan too so that I can burp the system also. Much appreciated! Eddie

12-26-2016, 07:26 AM	#13
elane352 Registered User Join Date: Jul 2014 Location: Bowie, Maryland Posts: 82	Re: Heater Core Removal - 64 C-10 - Thrift Air By the way, I did get the heater box off, got the rust removed, painted the box, and installed a replacement heater core. Thanks again. Eddie



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