Four Seasons 57648 A/C Compressor Conversion Kit

Four Seasons 57648 A/C Compressor Conversion Kit

Four Seasons 57648 is a remanufactured GM-style A/C compressor conversion kit built for R134a service and equipped with a clutch assembly, pressure switch, and oil fill. It is a direct-fit option for select Ford Thunderbird, Cougar, LTD, Mustang, and Mercury Marquis applications that require a reman compressor and bracket kit.

Key Features

• Remanufactured DA6 compressor type for GM-style A/C conversion service
• Configured for R134a refrigerant with PAG 150 oil compatibility
• Clutch included with 12V coil voltage and 1-groove V-belt pulley
• High-pressure switch included with pressure switch design
• Type I mounting with metric threads and block-mount suction port
• Oil filled and supplied with O-rings and sealing washer
• Four Seasons 57648 cross-references Dorman 57648 for the same application

Product Details

This Four Seasons Reman Compressor line unit is built as a remanufactured replacement for vehicles using the DA6 compressor platform. It uses a 5.125-inch clutch maximum diameter, 130.048 mm pulley diameter, and a V-belt pulley layout with one groove. The compressor is set up for R134a refrigerant service, uses PAG 150 oil, and includes a high-pressure switch plus clutch assembly for a complete conversion-focused repair path. Four Seasons 57648 is listed for 1983-1988 Ford Thunderbird, 1985-1986 Ford Cougar, 1983 and 1986 Ford LTD, 1983-1986 Mercury Cougar, 1983-1986 Mercury Marquis, and 1984 Ford Mustang. This part cross-references Dorman 57648 for the same application.

Common Problems This Part Can Address

• Loss of A/C cooling from a worn or seized compressor
• Compressor clutch engagement issues
• High-pressure switch-related A/C shutdown concerns
• Leaks at compressor sealing surfaces or suction port connections
• Noise or belt-drive problems from a failing compressor assembly

Installation Notes and Tips

• Fits 1983-1988 Ford Thunderbird, N/A; must purchase bracket kit
• Fits 1985-1986 Ford Cougar, N/A; must purchase bracket kit
• Fits 1983 and 1986 Ford LTD, N/A; must purchase bracket kit
• Fits 1983-1986 Mercury Cougar, N/A; must purchase bracket kit
• Fits 1983-1986 Mercury Marquis, N/A; must purchase bracket kit
• Fits 1984 Ford Mustang, N/A; must purchase bracket kit
• Verify refrigerant system cleanliness, oil type, and connector style before installation
• Use the correct O-rings and sealing washer at the suction port during assembly

Quality Assurance

Four Seasons remanufactured compressor components are built to match the listed application details and service configuration for the vehicles shown above. Confirm the compressor type, pulley layout, and mounting style against the original unit before installation.