Who sells CORRECT heater cores?
Who sells CORRECT heater cores?
In searching through the board, I see many posts on how you change out the heater core on a 3rd-Gen, but noone says anything about where is a good place to find a core that will FIT. I've gone thru 3 replacement cores so far and either they won't fit on the plastic 'carrier' that holds the core and screws into the heater box, or the alignment of the intake/exhaust tubes is so sucky that you can't get them to fit thru the holes in the firewall because they're spaced too far or too close to each other. On top of that, all the ones I've found so far are aluminum- doesn't anyone still make bronze/copper cores?
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Joined: May 2008
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From: London, Ont, Canada
Car: 87 T-Top GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: Who sells CORRECT heater cores?
I got my heater core from APC, they sell AC Delco parts and much more! But I don't see why an aluminum heater core being a problem! You could try a local Rad shop for a reman, or could try a dealer, or you could take your old core with you when you try buying your next replacement core!
Good luck!
Good luck!
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From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: Who sells CORRECT heater cores?
I just replaced mine and got the correct one off the shelf at a local ADVANCE AUTO store, so far they have been great finding replacement parts.
Last edited by red rock; Oct 1, 2009 at 10:25 PM.
Senior Member
Joined: May 2008
Posts: 833
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From: London, Ont, Canada
Car: 87 T-Top GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
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Re: Who sells CORRECT heater cores?
I dont think anyone sells a reman heater core.
I think the last one I did was aluminum. I dont see why you should care which it is, as long as it works. The stock radiators are aluminum so its not like there isnt aluminum in the cooling system anyway. I did have to tweak the tubes slightly but it was pretty close. I think the one I got was Four Seasons brand.
I think the last one I did was aluminum. I dont see why you should care which it is, as long as it works. The stock radiators are aluminum so its not like there isnt aluminum in the cooling system anyway. I did have to tweak the tubes slightly but it was pretty close. I think the one I got was Four Seasons brand.
Joined: Dec 2005
Posts: 4,795
Likes: 15
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: Who sells CORRECT heater cores?
In searching through the board, I see many posts on how you change out the heater core on a 3rd-Gen, but noone says anything about where is a good place to find a core that will FIT. I've gone thru 3 replacement cores so far and either they won't fit on the plastic 'carrier' that holds the core and screws into the heater box, or the alignment of the intake/exhaust tubes is so sucky that you can't get them to fit thru the holes in the firewall because they're spaced too far or too close to each other. On top of that, all the ones I've found so far are aluminum- doesn't anyone still make bronze/copper cores?
Senior Member
Joined: Mar 2009
Posts: 503
Likes: 1
From: Des Moines, IA
Car: 90 Formula WS6, 86 Sport Coupe
Engine: 305 TBI, 2.8 MPFI
Transmission: 700r4, 700r4w/vette servos
Axle/Gears: 2.73 Open, 3.42 Open
Re: Who sells CORRECT heater cores?
Bought mine from rockauto.com. Made of copper and fits perfectly.
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Supreme Member
iTrader: (2)
Joined: Sep 2009
Posts: 1,591
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From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: Who sells CORRECT heater cores?
On Probation


Joined: Apr 2007
Posts: 1,592
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From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: Who sells CORRECT heater cores?
I also got my knockoff brand brass/copper replacement core from Auto Zone
for about $30 bucks. It fit into the heater box ok but as like everybody else
it took a bit of massaging/bending/tweeking the core nipple pipes to get them
to go thru the holes in the firewall ! A PIA for sure...................
But it is sure nice to have heat on those chilly fall mornings!
for about $30 bucks. It fit into the heater box ok but as like everybody else
it took a bit of massaging/bending/tweeking the core nipple pipes to get them
to go thru the holes in the firewall ! A PIA for sure...................
But it is sure nice to have heat on those chilly fall mornings!
Joined: Feb 2002
Posts: 3,462
Likes: 4
From: N. Illinois
Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Re: Who sells CORRECT heater cores?
I despise AutoZone.
I got mine from Advance Auto like Red Rock and it dropped right in with no issues.
I got mine from Advance Auto like Red Rock and it dropped right in with no issues.
Re: Who sells CORRECT heater cores?
Ok I got the Autozone version of the core- it fits fine on the carrier but I noticed that the tubing is a little crooked (that is, out of line) when compared to the original core. Between me and the salesman we managed to get the tubing straightened out- I'm just hoping I didn't crack the aluminum in doing so.
As for my wanting copper over aluminum- heat transfer. I'm sure the aluminum will be ok but copper would've dissapated the heat a tad better. Plus it woudl've been easier to bend...
I'm installing it this morning- will keep you guys posted....
As for my wanting copper over aluminum- heat transfer. I'm sure the aluminum will be ok but copper would've dissapated the heat a tad better. Plus it woudl've been easier to bend...

I'm installing it this morning- will keep you guys posted....
Joined: Dec 2005
Posts: 4,795
Likes: 15
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: Who sells CORRECT heater cores?
Well, it's in and it seems to be working fine. Tons of hot air, and no leaks that I'm able to find. It did take a little... 'persuasion' to get in, (as opposed to the last one I tried which wouldn't go in even after a lot of persuasion :/) so rebending those inlet/outlet pipes did the trick.
There is an Advance Auto here- if this core takes a dump on me after it goes out of the warrenty period, I'll try theirs- otherwise I'll be stuck with having to go to a dealer...
Thanks guys for the input!
There is an Advance Auto here- if this core takes a dump on me after it goes out of the warrenty period, I'll try theirs- otherwise I'll be stuck with having to go to a dealer...

Thanks guys for the input!
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