Four Seasons 4985NK A/C Compressor and Component Kit

Complete A/C Kit for OE-Style Service

Restore air conditioning performance with the Four Seasons Complete A/C Kit, part number 4985NK. This kit combines the major components needed for a complete compressor replacement on select Ford, Lincoln, and Mercury vehicles with R134a systems.

Built around a new compressor and matched service parts, 4985NK is a direct-fit solution for 2003-2005 Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis applications, plus 2003-2004 Ford Grand Marquis and Mercury Marauder models with a scroll compressor and OE design compressor setup.

Key Features

• Four Seasons Complete A/C Kit, part number 4985NK
• Includes a new compressor, accumulator, orifice tube, oil, and O-rings
• Uses R134a refrigerant system specifications
• Orifice tube: orange, standard style, .057 in. diameter
• Accumulator features female springlock inlet and outlet fittings
• Compressor oil included
• Limited lifetime warranty

Product Details

The Four Seasons Complete A/C Kit 4985NK is organized for full-system service rather than a single-component swap. It includes compressor 78588, accumulator 83148, orifice tube 38639, oil 59007, and O-rings, giving you the core parts needed when servicing an OE-style R134a air conditioning system. The accumulator measures 3.500 inches in diameter and 8.000 inches in length, with 0.750-inch female springlock inlet and outlet fittings. The orange standard orifice tube uses a .057-inch opening for the specified application.

This part cross-references 520452 for the same application. Four Seasons 4985NK is a practical choice for 2003-2005 Ford Crown Victoria, 2003-2005 Lincoln Town Car, and 2003-2005 Mercury Grand Marquis service, as well as 2003-2004 Ford Grand Marquis and Mercury Marauder models listed with scroll compressor and OE design compressor notes.

Common A/C Problems It Can Address

• Weak or inconsistent cabin cooling
• Compressor failure or noisy compressor operation
• Restricted refrigerant flow through the orifice tube
• Moisture or contamination concerns in the accumulator circuit
• Leaks at worn seals and O-ring connections

Installation Notes

Verify the vehicle’s compressor style, refrigerant type, and fitting configuration before installation. Replace the accumulator and orifice tube when servicing the compressor to help support proper system operation. Always follow the vehicle service manual for evacuation, oil balancing, and recharge procedures.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. The complete kit format helps streamline OE-style A/C repair by pairing the compressor with the matched service components specified for the listed applications.