Four Seasons 2646NK A/C Compressor and Component Kit - Front

Complete A/C Kit for R4 Applications

The Four Seasons Complete A/C Kit 2646NK is a complete air conditioning kit with a new compressor for select GM and Pontiac applications using an R4 compressor. It combines the major service components needed for a full A/C refresh, including the compressor, accumulator, orifice tube, PAG oil, and O-rings.

Built for R134a systems, this Four Seasons Complete A/C Kit is a direct-fit service solution for vehicles such as the Chevrolet Camaro, Pontiac Firebird, and Cadillac Eldorado with the listed R4 compressor configurations. Part number 2646NK is organized for repair work that requires replacing the core A/C components together.

Key Features

• Complete air conditioning kit with new compressor
• Includes compressor oil: PAG Oil /150
• Uses R134a refrigerant systems
• Expansion device type: orifice tube
• Kit includes compressor, accumulator, orifice tube, oil, and O-rings
• Limited lifetime warranty
• Four Seasons Complete A/C Kit line for consolidated HVAC service

Product Details

Part number 2646NK includes Four Seasons 58231 new compressor, 33198 accumulator, 38623 orifice tube, 59003 oil, and O-rings. The accumulator uses a 3.500-inch diameter, 9.000-inch length, 0.750-inch inlet and outlet fittings, with a female O-ring inlet and male insert O-ring outlet. The orifice tube measures 0.072 inch and uses a white standard-style tube.

This kit is built for vehicles listed with R4 compressor setups, including 1982-1984 Chevrolet Camaro, 1982-1984 Pontiac Firebird, 1984-1985 Cadillac Eldorado, 1984-1985 Cadillac Seville, 1985 Buick Riviera, 1982 Chevrolet S10, 1982 GMC S15, 1983-1984 Chevrolet G20 and G30, 1983-1984 GMC G2500 and G3500, 1986 Chevrolet Camaro, and 1987 Pontiac Firebird. This part cross-references Four Seasons 2646NK for the same application.

Common Repair Uses

• Restoring weak or inconsistent cabin cooling
• Replacing a noisy, worn, or failed compressor
• Addressing contamination in the A/C system during compressor service
• Refreshing the accumulator and orifice tube during HVAC repair
• Servicing R134a conversions or R134a-based A/C repairs on listed vehicles

Installation Notes

Verify compressor style, pulley configuration, and switch requirements before ordering, especially on 1982-1987 Pontiac Firebird, Chevrolet Camaro, and Cadillac applications. Confirm the vehicle uses an R4 compressor and match the listed fitment notes, including front-position van applications where applicable. Replace the accumulator, orifice tube, and O-rings during installation, and follow the specified PAG Oil /150 charge procedure for the system.

Quality Assurance

Four Seasons backs this Complete A/C Kit 2646NK with a limited lifetime warranty.