#1  
Old 01-23-2022, 07:16 PM
SD455DJ SD455DJ is offline
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Default 1970 Firebird Parts Wanted

Looking for a new heater core (non A/C) and good used (or new) heater control cable (non A/C) for a '70 Firebird (non A/C). Thanks!

Dennis

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Old 01-24-2022, 07:12 PM
SD455DJ SD455DJ is offline
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Nothing out there?

Dennis

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Old 01-25-2022, 08:22 AM
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I have a few, but I never labeled them. Got a pic?

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Old 01-25-2022, 08:56 AM
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I have a few, but I never labeled them. Got a pic?
Teri, Do you mean the heater core, or the heater control cable, or both? Thanks!

Dennis

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Old 01-25-2022, 08:57 AM
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Sorry, heater cable


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Old 01-25-2022, 09:02 AM
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I'll post a picture when we tear it apart this Friday. Thanks Teri!

Dennis

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Old 01-25-2022, 09:03 AM
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May I ask why you don’t want an Autozone etc… heater core?


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Old 01-25-2022, 09:20 AM
SD455DJ SD455DJ is offline
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Good question...lol. We tried our local Car Quest, but they had nothing in stock, or even listed. I never bought anything from AutoZone yet, but I'll see if they do...O'Reily's too. Thanks for the suggestion!

Dennis


Last edited by SD455DJ; 01-25-2022 at 09:45 AM.
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Old 01-25-2022, 10:39 AM
78w72 78w72 is offline
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Originally Posted by SD455DJ View Post
Good question...lol. We tried our local Car Quest, but they had nothing in stock, or even listed. I never bought anything from AutoZone yet, but I'll see if they do...O'Reily's too. Thanks for the suggestion!

Dennis
rock auto is another option too, they usually have better prices than local parts stores.

https://www.rockauto.com/en/catalog/...ater+core,6864

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  #10  
Old 01-25-2022, 10:51 PM
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We found a real copper/brass heater core locally at a radiator shop that they had for a while! So scratch that off the list. I need to see which cable I need as I can't recall if it is the one for the heat control or the vent selector cable.

Dennis
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  #11  
Old 01-26-2022, 12:40 AM
Tellyshavilli Tellyshavilli is offline
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Default Heater core

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We found a real copper/brass heater core locally at a radiator shop that they had for a while! So scratch that off the list. I need to see which cable I need as I can't recall if it is the one for the heat control or the vent selector

Dennis
Did they have 2 heater cores ?

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Old 01-26-2022, 08:38 AM
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Did they have 2 heater cores ?
Hi Matt, We checked to see if they had any more or knew of any more, but they did not. Actually, the local Car Quest found it from a lot of digging and calling around, not just the warehouses...so, thank to them for locating one. Maybe check with older established radiator repair shops, they may have something hiding on the shelves.

Dennis

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Old 01-26-2022, 08:18 PM
Ramairnacho Ramairnacho is offline
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Default Heater core

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Originally Posted by SD455DJ View Post
We found a real copper/brass heater core locally at a radiator shop that they had for a while! So scratch that off the list. I need to see which cable I need as I can't recall if it is the one for the heat control or the vent selector cable.

Dennis
What's the advantage of brass copper vrs aluminum?

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Old 01-26-2022, 08:21 PM
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What's the advantage of brass copper vrs aluminum?

The “right” look


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Old 01-26-2022, 08:33 PM
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What's the advantage of brass copper vrs aluminum?
RANacho, Here's a long winded explanation from U.S. Radiator:

Copper/Brass vs. Aluminum Radiators

The thermal conductivity or heat transfer rate of copper is 92% versus aluminum which is approximately 49%. However, the copper fin bonded to the tubes, or water passages, using lead solder is very inefficient and slows the heat transfer rate to just slightly better than that of aluminum. This can be a disadvantage of copper if the bonding process does not allow the copper fin to touch the brass tube, and why not all copper/brass cores of similar design, but different manufactures, transfer heat equally. Copper/brass radiators, because of their weight and durability, have been around a long time and can be easily disassembled and reassembled for cleaning purposes. Not the case with aluminum, unless speaking of the O.E. version that comes with crimp mounted plastic tanks. As a result the life expectancy of the aftermarket aluminum radiators will be far less than that of copper/brass.

To better understand the function and performance of any given radiator it helps to understand the “cooling” process and think of it in a way that allows for comparison. The words cooling, or better cooling, or efficient cooling are thrown around a lot in advertising and promotional terms but for the most part un-quantifiable at best without a reference or yardstick to measure by.
To measure and control the cooling processes you have to take several variables into consideration. Variables include engine temperature production at different rpm’s, or engine operating btu output, coolant absorption rates, coolant flow rates, or gpm’s, and coolant temperature reduction rates that will vary with the size of the radiator and the amount of (cfm’s), speed, and temperature of the air flowing through the radiator. The only device to actually compare one radiator vs. another with absolute control is to have a wind-tunnel that can duplicate actual driving conditions under various specified conditions. U.S. Radiator built radiator dyno or test stand in 1999 and tested every core design and manufacturer, in both copper/brass and aluminum, for plain and simple temperature drop, inlet to outlet, at specific and controlled parameters.
So what did U.S. Radiator learn? First and foremost, they discovered that where the radiator is concerned core design and NOT material had the greatest effect on temperature drop. While all radiator cores might look the same they perform differently based on tube spacing and fins per inch. Heat transfer points where temperature is actually allowed to leave the radiator are where the fin is bonded to the tube. The more transfer points, the greater the temperature drop. A 60’s core for example had a 1/2” tube spacing (ie, 1/2” fin between the tubes) and by going from a two row radiator to a four row core design they were able to double the heat transfer points which resulted in a 15-20% increase in temperature drop without changing the other variables (air flow, coolant flow). In the 80's the Japanese came out with a core design in response to the need to down size, which has become the standard, and was efficient enough to allow the re-introduction of aluminum (a less efficient heat transfer material) at the O.E. level. By changing the tube spacing to 3/8", a design referred to as High Efficiency in the industry, more tubes or water passages and fins were allowed across the face of a core with a specific width in inches. The design was simple enough but proved to be very efficient in that more heat transfer points created greater temperature drop inlet to outlet. At this point the move to aluminum construction was purely financial in that raw materials are purchased “by the pound” and a finished aluminum radiator weighs about 25% of a copper/brass unit (dollars per pound being almost equal at that time) and resulted in huge savings to the O.E.’s . This is why we’ve seen most copper/brass manufacturers either switch to aluminum or fold up their tents permanently. It is important to note that this decision was based solely on financial savings and should not be confused with more efficient.

Dennis

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Old 01-26-2022, 08:34 PM
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The “right” look


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Amen! Dennis

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Old 02-10-2022, 09:27 PM
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I'm still looking for the heater control cable (upper) for a non-AC '70 Firebird with controls the outlet position, either Off, Normal (floor) or De-Ice (windshield defroster). This cable is 24 1/2" long loop to loop and has a green plastic sleeve that connects to the heater box. The white one attaches to the top of the heater control chassis and the tab broke off of mine.

Dennis
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Old 02-11-2022, 08:11 AM
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I might have green,

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Old 02-11-2022, 12:59 PM
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Found one


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Old 02-11-2022, 01:31 PM
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Found one


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Sweet! Teri sending you a PM. Thanks!

Dennis

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