The air conditioning system evolved over the years in the Second Generation Camaro. It is often seen as (and is) a complex system. When it breaks it can be expensive and difficult to fix. Many people tend to rip it out of the car after it falls apart - for whatever reason.
Hopefully the depictions contained here will make it easier for you to understand, and therefore identify, fix or maintain your air conditioning system.
YOU CAN NOT SIMPLY SWAP A HEATER COVER OVER A FORMERLY AIR CONDITIONED CAR. A car with A/C will have a large, rectangular hole in the firewall, and the heater core hoses come through the firewall in a different location. If you place a non-AC cover on the firewall, it won't cover the holes and the heater core won't fit.
Helpful tip: The 411 on how to replace heater core.
A/C wiring diagrams: Wiring harness routing (1974) | 1972 | 1974 | 1976 | 1978 | 1980
A/C Vacuum Diagram: 1972 | 1974
1973 underhood system layout | 1974 A/C case | 1974 underhood hose layout
A/C housing (1974) | Dash vent ducting (1974) | control panel (1974) | evaporator & case (1974)
hose routing (1971) | Vacuum hose routing (1974) | Kick panel valve (1974) | Compressor
Air Conditioning Component Usage
1970 - 1973
1974 - 1976
1977 - 1979 (early)
non-metallic liquid lines
1979 (late) - 1981
metallic liquid lines
1970 - 1971 (early)
1971 (late) - 1973
1975 - 1980 (early)
hose & metal liquid line
1980 (late) - 1981
solid metal liquid line
Integral A/C is a factory installed system. The heater and A/C are combined. "hang-on" A/C means a system installed by the dealer or aftermarket after the car was made. The heater and A/C will have separate blower motors.
A/C heater core case (under dash) - showing under dash view, still installed.
A/C housing (under hood) and again, with the housing removed
Removed heater box - showing relationship of core to case.
Author: MadMike Maciolek
North Georgia Classic Camaro
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