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FOR SALE: CADILLAC TRUNK MOUNTED REAR A/C UNIT - $400 OBO This trunk-mounted rear A/C unit comes out of a 1956 Cadillac Sedan. Compressor, rear intake vents and associated roof vents available upon request. Contact Brad at (832) 798-7778 M-F 8am-5pm CST
So, last week, I drove my '63 out from Detroit to Chicago. 85-90F, 70mph, AC (just converted to run on R134) on full--and, about 2 1/2 hours outside of Detroit, the HOT light came on. I dialed the AC temp control to low (eg, not quite as ice cold) and cut my speed back to about 60mph, and that seemed to do the trick. Upon arriving in Chicago and letting the car cool, there didn't seem to be any leaks or drop in coolant level. And, fyi, I had the heater core replaced last year. Near as I can tell, I still have the original radiator (and other cooling system components). On the trip back (at 75F), there were no issues. Is this behavior 'normal' given the age and condition of the car? I've seen folks mention four-core radiators and electric fans, and one friend even suggested I check the thermostat, so I thought I'd survey the crowd to see what--if anything--I might need to do. Thanks in advance...