Four Seasons 4187N A/C Compressor and Component Kit

Four Seasons PAC-Kit w/ New Compressor 4187N

The Four Seasons PAC-Kit with New Compressor, part number 4187N, is a direct-fit A/C compressor kit for select Ford and Mercury vehicles with York compressor systems. It supports factory air applications that use an internally equalized expansion valve and the listed service components for a complete HVAC repair path.

Compatible With 1974-1979 Mercury Cougar and 1977-1978 Ford Thunderbird applications that match the fitment notes below, this kit is built for owners restoring cooling performance on older factory A/C systems. The 4187N package line focuses on replacing the compressor and related service parts needed for a proper system refresh.

Key Features

• Four Seasons PAC-Kit w/ New Compressor for select classic Ford and Mercury HVAC systems
• Part number 4187N for easy ordering and catalog matching
• Fits York compressor applications with factory air
• Application notes call for an internally equalized expansion valve
• Listed for Ford Thunderbird and Mercury Cougar models in the 1974-1979 range

Detailed Description

Four Seasons 4187N is an A/C compressor kit intended for specific vintage Ford Thunderbird and Mercury Cougar vehicles equipped with a York compressor. Fitment notes also identify factory air and an internally equalized expansion valve, with some applications calling for a drier with a 3-bracket setup. Use the vehicle notes to confirm the exact HVAC configuration before ordering. This part number, 4187N, is a focused solution for restoring compressor function in the original air conditioning system.

This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Weak or failed A/C compressor operation
• Loss of cabin cooling in factory air systems
• Noise or wear associated with an aging York compressor
• HVAC service needs tied to expansion valve and drier replacement
• Restoration work on classic Ford Thunderbird and Mercury Cougar A/C systems

Installation Notes and Tips

• Verify York compressor fitment and factory air equipment before installation.
• Match the expansion valve type to the vehicle notes, including internally equalized applications.
• Check the drier bracket configuration listed for the specific model year.
• Flush the system and use the correct oil specified in the fitment notes.
• Confirm all HVAC connections and system cleanliness before charging.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with cataloged application-specific coverage for classic vehicle air conditioning service. Use the exact fitment notes for 1974-1979 Mercury Cougar and 1977-1978 Ford Thunderbird applications to confirm proper selection.