Four Seasons 38866 A/C Expansion Valve

Reliable A/C Expansion Valve for BMW Models

The Four Seasons Expansion Valve 38866 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for select BMW models, this aluminum block-type valve ensures precise control of R134a refrigerant, maintaining optimal cooling performance.

• Constructed from durable aluminum material with an aluminum finish
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with insert o-ring seals
• Meets or exceeds OEM specifications for reliable fit and function

Detailed Product Features and Specifications

The Four Seasons Expansion Valve 38866 is a block-type A/C expansion valve crafted from aluminum, providing corrosion resistance and durability. It features female suction inlet and outlet fittings with No. 10 and No. 12 thread diameters respectively, both non-threaded for a secure fit. The liquid inlet and outlet fittings are also female with No. 6 and No. 8 thread diameters, designed with insert o-ring seals to prevent leaks. This valve is compatible with R134a refrigerant, commonly used in modern BMW air conditioning systems. The valve includes green o-rings ([24606] and [24608]) to ensure a tight seal during installation. It is designed to meet or exceed OEM standards, ensuring compatibility and performance for your BMW 325i, 325is, 325iX, 525i, 535i, 635CSi, 750iL, M5, and M6 models.

About the Four Seasons Expansion Valve Product Line

The Expansion Valve product line from Four Seasons focuses on precision-engineered A/C flow restrictors that regulate refrigerant flow within automotive air conditioning systems. This line is designed to provide reliable temperature control and system efficiency by maintaining proper refrigerant pressure and flow. The 38866 model is part of this line, offering a block-type valve solution tailored for specific BMW vehicles, ensuring proper fitment and function in OEM-equivalent quality.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain consistent cabin cooling
• Prevents compressor damage caused by improper refrigerant pressure
• Resolves issues with fluctuating or insufficient A/C cooling performance
• Eliminates refrigerant leaks due to worn or damaged expansion valves
• Supports efficient operation of R134a refrigerant systems in BMW vehicles

Installation Notes and Tips

• Ensure compatibility with your BMW model before installation (compatible with 325i, 325is, 325iX, 525i, 535i, 635CSi, 750iL, M5, M6)
• Use proper tools to avoid damaging the aluminum fittings and o-rings
• Replace green o-rings ([24606] and [24608]) during installation to maintain a leak-free seal
• Follow manufacturer torque specifications for mounting bolts and fittings
• Verify system is evacuated and charged with R134a refrigerant after installation

Quality Assurance and Warranty

The Four Seasons Expansion Valve 38866 is manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. This part undergoes rigorous quality control to maintain consistent fit and function. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or your supplier for exact warranty terms.