Four Seasons 4186R A/C Compressor Kit
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Four Seasons
 PAC-Kit w/ Reman Compressor

Four Seasons 4186R A/C Compressor Kit

Brand Four Seasons 4186R
Product line PAC-Kit w/ Reman Compressor
Fits Ford and Mercury · 28 vehicles

PAC-Kit with reman compressor. Complete A/C compressor kit for a straightforward replacement.

$355.10Free shipping
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Four Seasons PAC-Kit w/ Reman Compressor 4186R

Four Seasons 4186R is an A/C compressor kit for select Ford and Mercury vehicles with factory air and a York compressor setup. This PAC-Kit w/ Reman Compressor is built for service on older HVAC systems that use an externally equalized expansion valve.

Key Features

  • Four Seasons PAC-Kit w/ Reman Compressor for A/C compressor replacement
  • Application-specific for York compressor systems with factory air
  • Used on select 1972-1979 Ford Thunderbird, Mercury Cougar, and Mercury Montego models
  • Supports systems with externally equalized expansion valve configurations
  • Part number 4186R for catalog and fitment lookup

Detailed Description

Four Seasons 4186R is a PAC-Kit w/ Reman Compressor for classic Ford and Mercury HVAC service. It is listed for 1978-1979 Ford Thunderbird, 1974-1979 Mercury Cougar, and 1972-1976 Mercury Montego applications with York compressor systems and factory air. The fitment notes also identify externally equalized expansion valve setups, making this kit relevant for owners restoring or repairing original A/C hardware on these vehicles. Four Seasons 4186R is a direct-fit service part for the listed applications and should be matched to the vehicle’s existing A/C configuration before installation.

What It Is Used For

  • Replacing a worn or failed A/C compressor on listed Ford and Mercury models
  • Restoring cooling performance in factory air systems
  • Addressing compressor noise, seizure, or loss of pumping efficiency
  • Repairing refrigerant circulation issues in York compressor setups
  • Servicing older HVAC systems with externally equalized expansion valves

Installation Notes and Tips

Verify the vehicle’s compressor style, factory air equipment, and expansion valve configuration before ordering. Match the existing York compressor application to the fitment notes for your Thunderbird, Cougar, or Montego. Inspect the rest of the A/C system for contamination or wear before compressor replacement, and confirm the correct oil and refrigerant service procedures for the vehicle.

Quality Assurance

Four Seasons is a long-established automotive climate control brand with coverage for service parts across a wide range of vehicle applications. Part number 4186R is cataloged for the specific Ford and Mercury fitments listed above.

  • Fits 1978-1979 Ford Thunderbird, N/A; w/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; Drier w/ 3 Bracket
  • Fits 1977 Ford Thunderbird, N/A; w/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve
  • Fits 1974-1977 Mercury Cougar, N/A; w/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve
  • Fits 1978 Mercury Cougar, N/A; w/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; Drier w/ 3 Bracket
  • Fits 1979 Mercury Cougar, N/A; w/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve
  • Fits 1972-1976 Mercury Montego, N/A; w/ York Compressor; w/ Factory Air

Related reading

This part fits 28 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1979FordThunderbird——N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; Drier w/ 3 Bracket; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1979MercuryCougar——N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1978FordThunderbird——N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; Drier w/ 3 Bracket; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1978MercuryCougar6.6LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; Drier w/ 3 Bracket; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1977FordThunderbird——N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1977MercuryCougar——N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1976MercuryCougar5.8LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1976MercuryCougar6.6LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1976MercuryMontego5.8LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1976MercuryMontego6.6LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1975MercuryCougar5.8LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1975MercuryCougar6.6LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1975MercuryMontego5.8LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1975MercuryMontego6.6LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryCougar5.8LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryCougar6.6LV8N/Aw/ York Compressor; w/ Factory Air; w/ Externally Equalized Expansion Valve; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryMontego5.0LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryMontego5.8LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryMontego6.6LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1974MercuryMontego——N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1973MercuryMontego5.0LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1973MercuryMontego5.8LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1973MercuryMontego6.6LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1973MercuryMontego——N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1972MercuryMontego5.0LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1972MercuryMontego5.8LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1972MercuryMontego6.6LV8N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor
1972MercuryMontego——N/Aw/ York Compressor; w/ Factory Air; 57022 (Reman Compressor), 33377 (Filter Drier), 38864 (Exp Valve), 69991 (Flush), 59007 (Oil); PAC-Kit w/ Reman Compressor