Four Seasons 38863 A/C Expansion Valve
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Four Seasons
 Expansion Valve

Four Seasons 38863 A/C Expansion Valve

Brand Four Seasons 38863
Color Brass
Refrigerant Type R134A
Type TXV
Product line Expansion Valve
Fits Lincoln, Ford, and Mercury · 32 vehicles

TXV design. Precisely meters refrigerant flow for efficient A/C performance.

Brass construction. Durable material helps resist wear in the system.

R134A compatible. Built for use with R134A refrigerant.

Cross-references AP Exhaust 38863, Davico Mfg 17616 and Global Parts Distributors LLC 3411286 for the same application. See all 28.

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Four Seasons 38863 Expansion Valve Overview

The Four Seasons 38863 A/C expansion valve is a TXV-style HVAC flow restrictor built for R134A refrigerant systems. With a brass body and application-specific calibration, it regulates refrigerant flow into the evaporator for factory-air systems on select Ford, Lincoln, and Mercury vehicles.

Compatible With 1974-1980 Ford, Lincoln, and Mercury factory air applications, including Ford LTD, Thunderbird, Mercury Cougar, Grand Marquis, Marquis, and Lincoln Continental. This Four Seasons Expansion Valve line is focused on direct-fit HVAC service parts for older vehicle air conditioning systems.

Key Features

  • Part number 38863 A/C expansion valve
  • TXV design for refrigerant metering at the evaporator inlet
  • Brass construction
  • Configured for R134A refrigerant type
  • Application coverage for factory-air systems on select Ford, Lincoln, and Mercury models

Detailed Product Description

The Four Seasons 38863 expansion valve controls refrigerant delivery in the A/C system so the evaporator can maintain proper cooling performance. This TXV-style valve is used in factory-air HVAC systems and is listed for vehicles with internally equalized systems where noted, including 1977-1979 Ford LTD and Thunderbird, 1974-1979 Mercury Cougar, 1977-1978 Mercury Grand Marquis and Marquis, and 1976-1980 Lincoln Continental applications. The 38863 part number is also referenced across multiple aftermarket and interchange listings for the same service application.

This part cross-references UAC EX6046C and Remy 17616 for the same application.

What This Part Helps Address

  • Weak or inconsistent cabin cooling
  • Improper refrigerant metering at the evaporator
  • A/C performance loss in factory-air systems
  • Expansion valve restriction or wear in older HVAC service repairs
  • Restoration work on classic Ford, Lincoln, and Mercury air conditioning systems

Installation Notes and Tips

  • Verify the vehicle uses an R134A service setup before installation.
  • Confirm the system is configured for a TXV expansion valve and match the factory-air notes shown in the fitment data.
  • Inspect related A/C components, seals, and refrigerant lines during service to avoid repeat repairs.
  • Follow the vehicle service manual for evacuation, charging, and leak-check procedures.

Quality Assurance

Four Seasons HVAC components are cataloged by application and built for service replacement in automotive climate-control systems. This part number 38863 is listed with direct interchange references and vehicle-specific fitment data for accurate ordering.

Related reading

This part fits 32 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
1980LincolnContinental—N/AExpansion Valve
1979FordLTD—N/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1979FordLTDBaseN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1979FordLTDLandauN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1979FordThunderbird—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1979LincolnContinental—N/AExpansion Valve
1979MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1978FordLTD—N/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1978FordLTDBaseN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1978FordLTDLandauN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1978FordThunderbird—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1978LincolnContinental—N/AExpansion Valve
1978MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1978MercuryGrand Marquis—N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1978MercuryMarquis—N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1977FordLTD—N/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1977FordLTDBaseN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1977FordLTDLandauN/Aw/ Factory Air; w/ Internally Equalized System; Expansion Valve
1977FordThunderbird—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1977LincolnContinental—N/AExpansion Valve
1977MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1977MercuryGrand Marquis—N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1977MercuryMarquis—N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1976FordThunderbird—N/Aw/ Factory Air; From 6/1/76; Expansion Valve
1976LincolnContinental—N/AFrom 6/1/76; Expansion Valve
1976MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1976MercuryGrand Marquis—N/Aw/ Factory Air; From 6/1/76; Expansion Valve
1976MercuryMarquisBaseN/Aw/ Factory Air; From 6/1/76; Expansion Valve
1976MercuryMarquisBroughamN/Aw/ Factory Air; From 6/1/76; Expansion Valve
1976MercuryMarquisColony ParkN/Aw/ Factory Air; From 6/76; Expansion Valve
1975MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
1974MercuryCougar—N/Aw/ Factory Air; Internally Equalized; Expansion Valve
Directly replaces or cross-references 28 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 38863Davico Mfg — 17616Global Parts Distributors LLC — 3411286UAC — EX6046C1760615517015549115580120733320819820824075886300008881100000888146904625938863014755803758863111388631918981988919558A97333AC3801CCWK758863D6OZ19849AEX6046FE198YG196