In '80, Pontiac introduced the new R4 A/C compressor to some of its Trans Ams and Firebirds. Weighing in at nearly half the mass of the long-in-the-tooth A6 compressor, the R4 continued in the F-body ...
The compressor is the power unit of the air-conditioning system that puts the refrigerant under high pressure before it pumps it into the condenser, where it changes from a gas to a liquid. A fully ...