68Bigred
Active Member
Commando1 not sure if yours is the same as my 67 coronet I had. I never got great ac out of the car (when all else was rebuilt or new AND running sanden pump). I took apart the airbox and tested that valve that is supposed to close when the big main door opens. I the rod was hooked up but internally the valve must have rusted away in the inside. What I discovered when the AC turned on it didnt stop the flow of coolant thru the heater core. Basically my coronet was blowing thru a hot heater core and a cold evaporator making the whole operation moot. I pinched off the heater hose and wow had great AC then. felt like having the AC on but the temp slider all the way to hot. Just my experiance