Four Seasons 38602 A/C Expansion Valve

Four Seasons 38602 Expansion Valve

Four Seasons 38602 is a block-type A/C expansion valve for R134A systems. Built from aluminum and configured as a w/o solenoid replacement, it helps regulate refrigerant flow in the HVAC system for a range of classic import applications, including Mercedes-Benz, Jaguar, BMW, and Volkswagen Vanagon models.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female FIO O-ring liquid and suction connections
• Liquid inlet: No. 6, 5/8"-18 thread; liquid outlet: No. 8, 3/4"-18 thread
• Suction inlet and outlet: No. 10, 7/8"-18 thread
• 2 mounting holes for OE-style installation
• Super heat setting: 6.300
• Meets or exceeds OEM requirements
• Four Seasons 38602 expansion valve cross-references Monroe Shocks & Struts 182208 for the same application

Product Details

This Four Seasons Expansion Valve line focuses on direct-fit HVAC flow control for vehicles that rely on a block-style metering device. Part number 38602 is specified for R134A service and uses female O-ring fittings at both the liquid and suction sides, with the listed thread sizes and port dimensions matching OE-style service requirements. It is a practical replacement for restoring proper refrigerant metering in systems found on Mercedes-Benz 300D, 300SD, 300TD, 420SEL, 560SEL, 560SEC, and 560SL models, as well as Jaguar XJ6 and Vanden Plas applications.

Common Problems This Part Can Address

• Inconsistent cabin cooling caused by incorrect refrigerant metering
• Warm air from the vents when the A/C system is not regulating flow correctly
• Pressure imbalance in an R134A HVAC system
• Reduced A/C performance in older Mercedes-Benz, Jaguar, BMW, or Vanagon applications
• Service issues related to a worn or leaking expansion valve

Installation Notes and Tips

Verify the vehicle’s original valve style, port sizes, and refrigerant type before installation. This part uses female O-ring fittings and a block-type layout, so matching the OE configuration is important for proper sealing and fitment. Confirm the application against the listed vehicles, including Fits 1977-1981 Mercedes-Benz 300D, Fits 1981-1985 Mercedes-Benz 300SD, Fits 1982-1985 Mercedes-Benz 300D, Fits 1986-1991 Mercedes-Benz 560SL, Fits 1987-1992 Jaguar XJ6, and Fits 1987-1991 Volkswagen Vanagon. For best results, inspect the O-ring sealing surfaces and replace any damaged seals during service.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM specifications. The part is built for OE-style service on confirmed applications and is supported by extensive interchange coverage, including Four Seasons 38602, AMS Automotive 4651, Dorman - HELP 91049, and UAC EX9441C references.