I have heard that the R/T’s and GTX’s Have heavy duty cooling systems. Can anyone tell me if the radiators are three core or four core radiators? Do the cooling fans have seven blades?
Heavy duty cooling system
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It seems kind of ridiculous, but my GTX came from the factory with a 22” radiator, direct drive fan and no shroud. I believe that a buyer would have to order HD cooling specifically, or select another package which included it, like a “Track Pack” or AC…
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I've had five GTXs with the heavy duty cooling system, which included a 26 inch radiator. Two factory '69 A/C cars, one had a direct drive fan from the factory, the other had a thermal drive, which was the usual set up. Seven blades on each, with shroud. One '69 with Performance Axle Package, one '69 Track Pak 4 speed, and one '68 Hemi automatic- fan on each of those was a seven blade viscous drive. Three row cores from the factory. Current A/C car had the original radiator re-cored with a two row, with bigger tubes than original. No cooling issues, when running A/C at 90 degrees.
My unrestored '68 GTX with automatic and no A/C came with a 22 inch radiator, a shroud, and a seven blade direct drive fan. Never had a cooling issue after I had the original radiator re-cored.
My unrestored '68 GTX with automatic and no A/C came with a 22 inch radiator, a shroud, and a seven blade direct drive fan. Never had a cooling issue after I had the original radiator re-cored.
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1KoolBee
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My ‘68 383/auto Bee has the ultra rare ( for ‘68 bees) factory air. High capacity cooling fan (sales code 491) is called out in the fender tag. It came with a 2-row 26” radiator and a 3” pitch seven blade clutch fan. It was barely adequate, especially in town on an 100+ degree day until I recored to a 3 row, then I could run the air anytime with no problem. Getting ready to recore again to a ridiculously expensive 4 row since the 3 row is about done.
ckessel
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I have a 26" 3 row unit on order through a local, somewhat, radiator shop. Brass/Copper unit. It's coming out of Texas. $425 plus shipping and tax. It's for my 67 wagon which the PO put in an eBay universal special. He butchered the fan and shroud to make it "work". I picked up a new correct shroud, fan, clutch and hoses.
Thank you all so much for your responses. I love to hear how other people work this stuff out.
Fender tag or build sheet?
1KoolBee
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Fender Tag
Might want to re-think that four core... All to often a four core doesn't cool as well as a three core... The first layer of tubes gets full ambient temperature air flow, the second layer gets air that's already hot... The third layer gets air that's even hotter... Therefore it can't remove much heat... Layer four? All it's doing is restricting air flow, not doing much if any heat removal.... The trend these days is two rows of thicker tubes...
A lot of the old four cores also used smaller tubes to reduce the depth of the core so it doesn't interfere with the fan/clutch space... Those smaller tubes get plugged with debris that would pass through a standard core.... Since there is nothing else trapping debris the radiator acts like a filter...
Just something you might want to consider before dropping big $$$$
1KoolBee
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My dad used to have a ‘68 polara, 383 2bbl and it had air and he towed a 20’ Prowler travel trailer with it, plus the dog, us kids and whatever else he could throw in there. The factory 22” 2-row overheated all the time. He put a 4 row 22” in it and it never got off “normal” (180 thermostat) no matter what he threw at it
Good luck...
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As I've mentioned b4, my '70 GTX RS23V0A****** came equipped with the A34 Super Track pack which includes a 26" max cool radiator (3 tube 26 fins/inch WWW between the tubes) OEM # 2998956, 4.10:1 DANA rear, heat exchanger on the power steering pump, power power front disc brakes. I recently purchased a OEM replacement radiator from GLENN RAY ....also max cool design...more tubes and more fins/inch, with shroud, 7 blade aluminum HEMI fan (#2863216), drive sheave # 2946716, # 2806070 TORQUE DRIVE FAN CLUTCH and the Flowkooler pump. .....FYI......
BOB RENTON
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