Four Seasons 38901 A/C Expansion Valve - Rear
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Four Seasons
 Expansion Valve

Four Seasons 38901 A/C Expansion Valve - Rear

Brand Four Seasons 38901
Position Rear
Color Aluminum
Description Expansion Valves
Liquid Inlet Fitting Gender Female
Liquid Inlet Fitting Thread Diameter No. 6
Liquid Inlet Size IN 0.57
Liquid Inlet Size MM 14.5
Liquid Inlet Style FOR
Liquid Inlet Thread Type 5/8" - 18
Liquid Inlet Type O-Ring
Liquid Outlet Fitting Gender Female
Liquid Outlet Fitting Thread Diameter No. 8
Liquid Outlet Style FOR
Liquid Outlet Thread Type 3/4" - 18
Liquid Outlet Type O-Ring
Lqd Out Size IN 0.69
Lqd Out Size MM 17.6
Material Aluminum
Meets / Exceeds OEM? Yes
Mounting Hole Quantity 2
O-Ring A Number/Desc [24606] / Green O-Ring
O-Ring B Number/Desc [24608] / Green O-Ring
O-Ring C Number/Desc [24610] / Green O-Ring
Refrigerant Type R134A
Style w/o Solenoid
Suc In Size IN 0.69
Suc In Size MM 17.6
Suc Out Size IN 0.81
Suc Out Size MM 20.7
Suction Inlet Fitting Gender Female
Suction Inlet Fitting Thread Diameter No. 8
Suction Inlet Style FOR
Suction Inlet Thread Type 3/4" - 18
Suction Inlet Type O-Ring
Suction Outlet Fitting Gender Female
Suction Outlet Fitting Thread Diameter No. 10
Suction Outlet Style FOR
Suction Outlet Thread Type 7/8" - 18
Suction Outlet Type O-Ring
Super Heat 8.000
Switch Included? Not Included
Tonnage 1.500
Type Block Type
Product line Expansion Valve
Fits Jeep, Dodge, Renault, Chrysler, Plymouth, International, Ford, and Mercury · 179 vehicles

OE direct replacement. Meets or exceeds OEM requirements for dependable A/C flow control.

Aluminum block type. Lightweight construction with O-ring connections for a secure seal.

R134A compatible. Built for modern refrigerant systems and precise expansion performance.

Cross-references BBB Industries 17526, Davico Mfg 17632 and Dorman - HELP 91012 for the same application. See all 78.

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Four Seasons 38901 Expansion Valve

Four Seasons 38901 is a block-type A/C expansion valve built for R134A systems and aluminum HVAC plumbing. It is an OE-style replacement for vehicles that need precise refrigerant metering, including Jeep Cherokee, Jeep Comanche, Jeep Wagoneer, Ford F-100, and Ford F-150 applications.

Key Features

  • Block-type A/C expansion valve for R134A refrigerant systems
  • Aluminum construction with aluminum finish
  • Female O-ring suction and liquid connections
  • Super heat setting: 8.000
  • Meets or exceeds OEM requirements
  • Designed for 1.5 ton HVAC applications
  • Style: w/o solenoid

Product Details

The Four Seasons Expansion Valve line focuses on accurate refrigerant flow control for automotive air conditioning systems. Part number 38901 uses a block-style design with female O-ring fittings and the specified thread sizes for suction and liquid ports, helping restore proper A/C system balance in factory-style HVAC layouts. This part cross-references Dorman - HELP (e.g., 91012) for the same application. Common fitment includes 1986-1990 Jeep Cherokee, 1986-1990 Jeep Comanche, 1978-1979 Ford F-150, and 1973-1979 Ford F-250. Four Seasons 38901 is also listed for 1974-1980 Jeep Wagoneer and 1971-1973 Ford Mustang factory-air applications.

What It Helps Fix

  • Warm air from the vents caused by poor refrigerant metering
  • Erratic evaporator performance in R134A A/C systems
  • Restricted or uneven refrigerant flow through the HVAC circuit
  • Loss of cooling efficiency in block-style expansion valve setups
  • System performance issues after replacing other A/C components

Installation Notes and Tips

Verify the vehicle uses a block-type expansion valve with the listed O-ring port sizes before installation. Match the suction and liquid inlet/outlet thread dimensions to the original HVAC connections, and replace sealing surfaces as needed during service. Confirm the system is charged with R134A and inspect the receiver drier, compressor, and evaporator for contamination before final assembly. Fits 1986-1990 Jeep Cherokee, 1986-1990 Jeep Comanche, 1974-1980 Jeep Wagoneer, 1978-1979 Ford F-100, and 1978-1979 Ford F-150 exactly as listed in the fitment data.

Quality Assurance

Four Seasons 38901 is engineered to meet or exceed OEM specifications for the listed applications, supporting consistent A/C system operation in compatible factory-style setups.

Related reading

This part fits 179 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1990JeepCherokee——N/AExpansion Valve
1990JeepComanche——N/AExpansion Valve
1990JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1990JeepWrangler——N/AA/C Receiver Drier; Expansion Valve
1989DodgeRam 50——N/AExpansion Valve
1989JeepCherokee——N/AExpansion Valve
1989JeepComanche——N/AExpansion Valve
1989JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1989JeepWrangler——N/AA/C Receiver Drier; Expansion Valve
1988DodgeRam 50——N/AExpansion Valve
1988JeepCherokee——N/AExpansion Valve
1988JeepComanche——N/AExpansion Valve
1988JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1988JeepWrangler——N/AA/C Receiver Drier; Expansion Valve
1987JeepCherokee——N/AExpansion Valve
1987JeepComanche——N/AExpansion Valve
1987JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1987JeepWrangler——N/AA/C Receiver Drier; Expansion Valve
1986JeepCherokee——N/AExpansion Valve
1986JeepComanche——N/AExpansion Valve
1986JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1985ChryslerLaser——N/AA/C Receiver Drier; Expansion Valve
1985ChryslerTown & Country——N/AA/C Receiver Drier; Expansion Valve
1985Dodge600——N/AA/C Receiver Drier; Expansion Valve
1985DodgeAries——N/AA/C Receiver Drier; Expansion Valve
1985DodgeCaravan——N/AA/C Receiver Drier; Expansion Valve
1985JeepCherokee2.1LL4N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1985JeepCherokee2.5LL4N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1985JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1985PlymouthTurismo——N/AA/C Receiver Drier; Expansion Valve
1985PlymouthTurismo 2.2——N/AA/C Receiver Drier; Expansion Valve
1985PlymouthVoyager——N/AA/C Receiver Drier; Expansion Valve
1984ChryslerLaser——N/AA/C Receiver Drier; Expansion Valve
1984ChryslerTown & Country——N/AA/C Receiver Drier; Expansion Valve
1984Dodge600——N/AA/C Receiver Drier; Expansion Valve
1984DodgeAries——N/AA/C Receiver Drier; Expansion Valve
1984DodgeCaravan——N/AA/C Receiver Drier; Expansion Valve
1984DodgeRampage——N/AA/C Receiver Drier; Expansion Valve
1984JeepCherokee2.5LL4N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1984JeepWagoneer——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1984PlymouthReliant——N/AA/C Receiver Drier; Expansion Valve
1984PlymouthTurismo——N/AA/C Receiver Drier; Expansion Valve
1984PlymouthTurismo 2.2——N/AA/C Receiver Drier; Expansion Valve
1984PlymouthVoyager——N/AA/C Receiver Drier; Expansion Valve
1983Dodge600——N/AA/C Receiver Drier; Expansion Valve
1983DodgeAries——N/AA/C Receiver Drier; Expansion Valve
1983DodgeRampage——N/AA/C Receiver Drier; Expansion Valve
1983PlymouthReliant——N/AA/C Receiver Drier; Expansion Valve
1983PlymouthTurismo——N/AA/C Receiver Drier; Expansion Valve
1983PlymouthTurismo 2.2——N/AA/C Receiver Drier; Expansion Valve
1982DodgeAries——N/AA/C Receiver Drier; Expansion Valve
1982DodgeRampage——N/AA/C Receiver Drier; Expansion Valve
1982PlymouthReliant——N/AA/C Receiver Drier; Expansion Valve
1981DodgeAries——N/AA/C Receiver Drier; Expansion Valve
1981PlymouthReliant——N/AA/C Receiver Drier; Expansion Valve
1980DodgeAspen——N/AA/C Receiver Drier; Expansion Valve
1980JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1980PlymouthTC3——N/AA/C Receiver Drier; Expansion Valve
1979FordF-1005.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1005.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1007.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1006.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1004.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1979FordF-1505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-1504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1979FordF-2505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-2507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-2506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-2504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1979FordF-3505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-3505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-3507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-3506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1979FordF-3504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1979JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1978FordF-1005.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1005.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1006.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1004.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1978FordF-1505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-1504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1978FordF-2505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-2505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-2507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-2506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-2504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1978FordF-3505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-3505.8LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-3507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-3506.6LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1978FordF-3504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1978JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1977FordF-100——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1977FordF-150——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1977FordF-250——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1977FordF-350——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1977JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1976FordF-100——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1976FordF-150——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1976FordF-250——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1976FordF-350——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1976JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1975FordF-100——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1975FordF-150——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1975FordF-250——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1975FordF-350——N/ADealer Air; w/ Block Style Valve; Expansion Valve
1975JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1974FordE-100 Econoline5.0LV8N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1974FordE-100 Econoline——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1974FordF-1005.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-1005.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-1006.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-100——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-1003.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974FordF-1007.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-1004.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974FordF-2505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-2505.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-2506.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-250——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-2503.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974FordF-2507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-2504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974FordF-3505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-3505.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-3506.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-350——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-3503.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974FordF-3507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1974FordF-3504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1974JeepWagoneer——N/Aw/ Block Style Valve; Expansion Valve
1973FordE-100 Econoline5.0LV8N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1973FordE-100 Econoline——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1973FordF-1005.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-1005.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-1006.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-100——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-1003.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordF-1007.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-1004.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordF-2505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-2505.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-2506.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-250——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-2503.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordF-2507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-2504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordF-3505.0LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-3505.9LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-3506.4LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-350——N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-3503.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordF-3507.5LV8N/Aw/ Factory Air; w/ Block Style Valve; Expansion Valve
1973FordF-3504.9LL6N/ADealer Air; w/ Block Style Valve; Expansion Valve
1973FordMustang——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1973FordPinto——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1973JeepWagoneer——N/Aw/ Block Type; Expansion Valve
1973MercuryCougar——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1972FordE-100 Econoline——RearExpansion Valve
1972FordMustang——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1972FordPinto——N/AExpansion Valve
1972JeepWagoneer——N/Aw/ Block Type; Expansion Valve
1972MercuryCougar——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1971FordE-100 Econoline——RearExpansion Valve
1971FordMustang——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1971FordPinto——N/AExpansion Valve
1971MercuryCougar——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1971MercuryMontego——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1970FordE-100 Econoline——RearExpansion Valve
1970MercuryMontego——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1969MercuryMontego——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1968MercuryMontego——N/AFits HVAC Blower Motor Wheel for vehicles with factory air.; Expansion Valve
1967JeepWagoneer——N/Aw/ Block Type; Expansion Valve
Directly replaces or cross-references 78 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 17526Davico Mfg — 17632Dorman - HELP — 91012Four Seasons — 38901Global Parts Distributors LLC — 3411301Monroe Shocks & Struts — 182135OSC — 4664UAC — EX9449CUAC — EX329433C71R84594379RD5932704379RD593270P3401157349A155388155809207338208135302113308011329404431606R154003158294060430970733875890190422512982070147599215502691875002187500418990351899046202757931309013130901AM31309203130920AM3131061AM3411268375890142050854443017713890111138901V1918984089051479100030091910014437917701025083770102653389560002128983501907A8274A2218591000AC3212CC8OZ19849ACWK758901E1HZ19849AE805025EA1065EX9400EX9404EX9449FE135H888214MT5519MT5523MT5524RD593270RD593270PS10329015SE2087249SE2087282T38901YG236