Four Seasons 38878 A/C Expansion Valve

Four Seasons 38878 Expansion Valve Overview

Four Seasons 38878 is a block-type A/C expansion valve for R134A systems, built in aluminum with female O-ring connections for the suction and liquid lines. It is specified for 1.5 ton applications with a 5.0 superheat setting and meets or exceeds OEM requirements for direct replacement service.

Compatible with Porsche 928 and Porsche 944 applications, this Four Seasons Expansion Valve line is focused on restoring proper refrigerant metering in the HVAC system. The 38878 part number is also referenced across multiple aftermarket and OE cross-reference listings for the same application.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female O-ring suction and liquid fittings
• Superheat setting: 5.0
• 1.5 ton rating
• Meets or exceeds OEM specifications
• Style: w/o solenoid
• Mounting hole quantity: 2

Detailed Description

Four Seasons 38878 is an A/C expansion valve that meters refrigerant flow into the evaporator to help maintain proper cooling performance and system balance. Its block-type design, R134A compatibility, and O-ring inlet and outlet connections make it a practical replacement for service work on Porsche 928 and Porsche 944 HVAC systems. The Four Seasons Expansion Valve product line is built for applications that require accurate refrigerant control and OE-style fitment, and part number 38878 is listed with multiple interchange references, including Monroe Shocks & Struts 182212 for the same application.

Fits 1978-1985 Porsche 928, N/A. Fits 1984-1985 Porsche 944, N/A; From 1/85.

What This Part Helps Address

• Weak or inconsistent cabin cooling
• Improper refrigerant metering at the evaporator
• HVAC performance issues caused by a worn expansion valve
• R134A system service needs on Porsche 928 and Porsche 944 models
• Leak-prone or deteriorated O-ring connection points during A/C repair

Installation Notes and Tips

Verify the suction and liquid line thread sizes, O-ring styles, and system refrigerant type before installation. This valve uses female O-ring fittings and a block-style layout, so line alignment and sealing surfaces should be checked carefully during A/C service. Always evacuate and recharge the system according to the vehicle service procedure after replacement.

Quality Assurance

Four Seasons 38878 is listed as meeting or exceeding OEM requirements, making it a direct-fit service part for the confirmed Porsche applications above. The aluminum construction and OE-style connection design support consistent replacement quality for HVAC repair work.