heater core needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MJN** · 08-01-2003, 12:45 AM

I need a good used heater core for my '72 blazer with A/C. I tried a new core but they don't make them the same size anymore and getting my old one fixed is out of the question. So if anyone has a good core around let me know. Thanks

stelth2002 · 08-01-2003, 02:12 AM

I have one without AC. is it the same?

*Phillip Johnson* · 08-01-2003, 04:16 AM

I have bought new ones in the past year and they are the same as always. Where are you looking? Kragan had them for about $45 if I remember and the non a/c for $25.
No, the a/c and non a/c is not the same.
Since they are such a pain in the a$$ to install, I would NEVER try a used one. just my .04 worth

68 Suburban · 08-01-2003, 08:05 AM

Autozone shows a new one for a 72 Blazer 4x4 with a 350 for $17.99

http://www.autozone.com/servlet/UiBr...2FC&PageSync=6

**MJN** · 08-01-2003, 10:36 AM

LMC sells them but they're a 1/4" off on all sides. That leaves an air gap in the heater box. I bought one from a radiator shop and it too was the wrong size. Then when I tried to have mine fixed he called the supplier and they told him that they don't make an exact replacement, it's smaller all around by a 1/4". So thats why I want an original.

*Phillip Johnson* · 08-01-2003, 11:06 AM

The Autozone deal sounde like the ticket.. Like I said, Why take the time to put in a used one as they will most likely leak and then you get to do it again. i have never had a problem with one from a parts store not fitting.. Just my opinion.

72moneypit · 08-01-2003, 11:46 AM

I bought my heater core (AC) at AutoZone, and it didn't fit exactly like the original. It was close, but I couldn't line up one of the mounting screws - it seemed like it was a little bigger than the old one. Once it was all put back together, though, it was impossible to tell. And for $25 bucks, it was a great deal.

**MJN** · 08-05-2003, 11:16 PM

Once again same problem. Called Autozone, wrong size. All dimensions were 1/4" off.

**Ironhorse** · 08-06-2003, 05:11 AM

Sent you a PM

**Classic Heartbeat** · 08-06-2003, 10:50 AM

Finding a supplyer that has the exact fit heater cores has been a real chore. We have used Napa auto parts for the standard heater cores, because they fit the way they are supposed to. Dimentionally they are the same as GM's are. I do not know for sure about the A/C cores though. We are working with a company now that is a major supplyer for Modine to try to get cores that are exact fitting. Once we achive that we will be offering them up on our website, however I can garrantee they won't be as cheap as the Auto Zone/ Kragan and LMC cores. I have already checked their soarces and the manufacturer is the same for all of them and they flat do not fit!! I will let everyone know when we are able to achive what we expect from our supplyer. WES www.ClassicHeartbeat.com

**COBALT** · 08-06-2003, 12:10 PM

I've replaced mine twice. NAPA all the way. They did accidentally give me an AC heater core once the first time I replaced it. The same company makes both, so the quality was the same.

I wouldn't hesitate. NAPA.

You might want to think about buying a seal kit from LMC to reseal the heater box. You can get both non-AC and AC kits, and it comes with all of the foam, and the rubber seals to go against the firewall. it also comes with resin to glue it all down. I spent a day cleaning and sealing my heater box and it made a HUGE difference this last winter.

stelth2002: They're not the same. The non-AC heater core is really basic. It's a rectangle with inlet and outlet that are straight. The AC heater core's inlet and outlet are pre-bent at funky angles, and end up being close to each other if I'm not mistaken.

**Classic Heartbeat** · 08-06-2003, 08:06 PM

Well I happy to report that our new supplyer supplys us with at least the exact fitting non air heater cores. The bonus is they are made in the USA!!! and we have 10 in stock! We will be retailing these on our site for $44.95 and they are garrinteed to fit! Not like some of the other cores that you need to modify your brackets or the core itself to get it to fit. We now have them listed on our website. Our represenative will be returning in the next day or so to show me the cores for the trucks with air. So MJN, if you could email me or post the dementions of your origanal I would appriciate it. I just don't have an origanal here to compare it to. Thanks, WES www.ClassicHeartbeat.com

**Classic Heartbeat** · 08-06-2003, 08:07 PM

with the bracket shot...

**Classic Heartbeat** · 08-06-2003, 08:08 PM

another

**Classic Heartbeat** · 08-06-2003, 08:09 PM

bottom

*Phillip Johnson* · 08-07-2003, 02:04 AM

If you must insist on having a USED heater core, FRENCHBLUE72 and I went swamp'n at the local wrecking yards and Im proud to announce that they were EVERYWHERE we looked. I would think that they would sell you one for a few bucks as some of them were being used as a scraper to wipe the mud off your feet as you left the yard. They were in the cabs, the beds, and some still in the heater boxes. I cant say that they were not aftermarkets since these trucks are 30+ years old and they most likely have been replaced over the years but, I do in fact know that they had several. We will be going back later this week to pick up a few parts that wouldnt fit in my little rice rocket 4x4 and we could pick one up for you. Let one of us know in the next day as we may be back there as soon as Thursday afternoon..

**MJN** · 08-07-2003, 01:00 PM

I think I found one, thanks guys.

WES, my heater core is 6.5" wide, 2.5" thick, and 9.5" tall. Hope that helps.

08-01-2003, 12:45 AM	#1
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,974	heater core needed I need a good used heater core for my '72 blazer with A/C. I tried a new core but they don't make them the same size anymore and getting my old one fixed is out of the question. So if anyone has a good core around let me know. Thanks __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

08-01-2003, 02:12 AM	#2
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	I have one without AC. is it the same? __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

08-01-2003, 08:05 AM	#4
68 Suburban Registered User Join Date: Oct 2000 Location: From Chicago, Live in Phoenix, AZ Posts: 6,802	Autozone shows a new one for a 72 Blazer 4x4 with a 350 for $17.99 http://www.autozone.com/servlet/UiBr...2FC&PageSync=6 __________________ Just sitting here contemplating contemplation.

08-01-2003, 11:46 AM	#7
72moneypit Registered User Join Date: Jan 2003 Location: Mesa, Arizona Posts: 125	I bought my heater core (AC) at AutoZone, and it didn't fit exactly like the original. It was close, but I couldn't line up one of the mounting screws - it seemed like it was a little bigger than the old one. Once it was all put back together, though, it was impossible to tell. And for $25 bucks, it was a great deal. __________________ Paul 72 Cheyenne Super Custom Camper greenaz@hotmail.com

08-06-2003, 05:11 AM	#9
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,087	Sent you a PM __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

08-01-2003, 04:16 AM	#3
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,580	I have bought new ones in the past year and they are the same as always. Where are you looking? Kragan had them for about $45 if I remember and the non a/c for $25. No, the a/c and non a/c is not the same. Since they are such a pain in the a$$ to install, I would NEVER try a used one. just my .04 worth

08-01-2003, 10:36 AM	#5
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,974	LMC sells them but they're a 1/4" off on all sides. That leaves an air gap in the heater box. I bought one from a radiator shop and it too was the wrong size. Then when I tried to have mine fixed he called the supplier and they told him that they don't make an exact replacement, it's smaller all around by a 1/4". So thats why I want an original.

08-01-2003, 11:06 AM	#6
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,580	The Autozone deal sounde like the ticket.. Like I said, Why take the time to put in a used one as they will most likely leak and then you get to do it again. i have never had a problem with one from a parts store not fitting.. Just my opinion.

08-05-2003, 11:16 PM	#8
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,974	Once again same problem. Called Autozone, wrong size. All dimensions were 1/4" off.

08-06-2003, 10:50 AM	#10
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	Finding a supplyer that has the exact fit heater cores has been a real chore. We have used Napa auto parts for the standard heater cores, because they fit the way they are supposed to. Dimentionally they are the same as GM's are. I do not know for sure about the A/C cores though. We are working with a company now that is a major supplyer for Modine to try to get cores that are exact fitting. Once we achive that we will be offering them up on our website, however I can garrantee they won't be as cheap as the Auto Zone/ Kragan and LMC cores. I have already checked their soarces and the manufacturer is the same for all of them and they flat do not fit!! I will let everyone know when we are able to achive what we expect from our supplyer. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

08-06-2003, 12:10 PM	#11
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	I've replaced mine twice. NAPA all the way. They did accidentally give me an AC heater core once the first time I replaced it. The same company makes both, so the quality was the same. I wouldn't hesitate. NAPA. You might want to think about buying a seal kit from LMC to reseal the heater box. You can get both non-AC and AC kits, and it comes with all of the foam, and the rubber seals to go against the firewall. it also comes with resin to glue it all down. I spent a day cleaning and sealing my heater box and it made a HUGE difference this last winter. stelth2002: They're not the same. The non-AC heater core is really basic. It's a rectangle with inlet and outlet that are straight. The AC heater core's inlet and outlet are pre-bent at funky angles, and end up being close to each other if I'm not mistaken. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

08-06-2003, 08:06 PM	#12
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	Well I happy to report that our new supplyer supplys us with at least the exact fitting non air heater cores. The bonus is they are made in the USA!!! and we have 10 in stock! We will be retailing these on our site for $44.95 and they are garrinteed to fit! Not like some of the other cores that you need to modify your brackets or the core itself to get it to fit. We now have them listed on our website. Our represenative will be returning in the next day or so to show me the cores for the trucks with air. So MJN, if you could email me or post the dementions of your origanal I would appriciate it. I just don't have an origanal here to compare it to. Thanks, WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys Last edited by Classic Heartbeat; 10-04-2007 at 06:57 PM.

08-06-2003, 08:07 PM	#13
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	with the bracket shot... __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys Last edited by Classic Heartbeat; 10-04-2007 at 06:57 PM.

08-06-2003, 08:08 PM	#14
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	another __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys Last edited by Classic Heartbeat; 10-04-2007 at 06:57 PM.

08-06-2003, 08:09 PM	#15
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	bottom __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys Last edited by Classic Heartbeat; 10-04-2007 at 06:57 PM.



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08-07-2003, 02:04 AM	#16
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,580	If you must insist on having a USED heater core, FRENCHBLUE72 and I went swamp'n at the local wrecking yards and Im proud to announce that they were EVERYWHERE we looked. I would think that they would sell you one for a few bucks as some of them were being used as a scraper to wipe the mud off your feet as you left the yard. They were in the cabs, the beds, and some still in the heater boxes. I cant say that they were not aftermarkets since these trucks are 30+ years old and they most likely have been replaced over the years but, I do in fact know that they had several. We will be going back later this week to pick up a few parts that wouldnt fit in my little rice rocket 4x4 and we could pick one up for you. Let one of us know in the next day as we may be back there as soon as Thursday afternoon..

08-07-2003, 01:00 PM	#17
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,974	I think I found one, thanks guys. WES, my heater core is 6.5" wide, 2.5" thick, and 9.5" tall. Hope that helps.

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