Four Seasons 39374 A/C Expansion Valve - Rear

Overview of Four Seasons Expansion Valve 39374

The Four Seasons Expansion Valve 39374 is designed specifically for Ford Expedition and Lincoln Navigator models. This A/C expansion valve regulates refrigerant flow in the vehicle's air conditioning system, ensuring optimal cooling performance with R134a refrigerant compatibility.

• Constructed from durable aluminum material
• Block type design with two mounting holes for secure installation
• Compatible with R134a refrigerant systems
• Female suction and liquid inlet/outlet fittings with No. 10 and No. 6/8 thread diameters
• Meets or exceeds OEM specifications for reliable performance

Four Seasons Expansion Valve Product Line Details

The Four Seasons Expansion Valve product line focuses on precise flow restriction components for automotive HVAC systems. This line is engineered to provide consistent refrigerant metering and system efficiency. The 39374 model exemplifies this with its block type design and carefully specified fitting sizes, ensuring compatibility and ease of integration with Ford Expedition and Lincoln Navigator air conditioning systems.

Technical Description and Specifications

This A/C expansion valve is made from aluminum, offering corrosion resistance and lightweight durability. It features a block type construction with two mounting holes for stable attachment. The valve supports R134a refrigerant, the standard for many modern vehicles. Both suction inlet and outlet fittings are female with No. 10 thread diameters, while liquid inlet and outlet fittings are female with No. 6 and No. 8 thread diameters respectively. The fittings use insert o-ring types with green o-rings ([24606] and [24608]) to ensure a secure, leak-free seal.

Common Applications and Problem Solving

• Restores proper refrigerant flow in Ford Expedition and Lincoln Navigator A/C systems
• Resolves inconsistent cabin cooling or fluctuating air temperatures
• Addresses issues related to refrigerant metering and pressure regulation
• Prevents compressor damage caused by improper refrigerant flow
• Eliminates leaks associated with worn or damaged expansion valves

Installation Notes and Tips

Ensure the vehicle’s A/C system is fully evacuated and depressurized before removing the old expansion valve. Verify that the replacement valve matches the OEM specifications, including fitting sizes and refrigerant type. Use proper torque on mounting bolts and inspect o-rings for damage or wear, replacing them if necessary. After installation, recharge the system with R134a refrigerant and test for leaks and proper cooling performance.

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39374 meets or exceeds OEM standards, providing reliable performance for Ford Expedition and Lincoln Navigator vehicles. It includes factory-installed green o-rings to maintain system integrity. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.