Four Seasons 39177 A/C Expansion Valve - Rear

Reliable Four Seasons Expansion Valve for Automotive A/C Systems

The Four Seasons Expansion Valve 39177 is engineered to regulate refrigerant flow in automotive air conditioning systems using R134a refrigerant. Designed with durable aluminum and a red finish, this block-type valve ensures precise temperature control and efficient cooling performance.

• Constructed from lightweight aluminum for durability and corrosion resistance
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with sealing washer style
• Meets or exceeds OEM specifications for reliable performance

Product Features and Specifications

The Four Seasons Expansion Valve 39177 features a block-type design optimized for automotive HVAC systems. It includes two mounting holes for stable attachment and female fittings on both suction and liquid sides, sized No. 10 for suction and No. 6/No. 8 for liquid inlet and outlet respectively. The valve uses sealing washers to ensure leak-free connections. Its aluminum construction provides strength while maintaining a lightweight profile. This valve is specifically designed for use with R134a refrigerant, common in many vehicle makes and models.

About the Four Seasons Expansion Valve Product Line

The Expansion Valve line from Four Seasons focuses on precise refrigerant flow control components for automotive air conditioning systems. This product line is engineered to meet or exceed OEM standards, providing reliable temperature regulation and system efficiency. The 39177 valve is part of this line, offering compatibility with a range of vehicles that utilize R134a refrigerant and require block-type expansion valves.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain optimal cabin temperature
• Prevents compressor damage caused by improper refrigerant pressure
• Resolves inconsistent cooling or fluctuating A/C performance
• Eliminates refrigerant leaks due to worn or damaged valves
• Supports efficient operation of R134a automotive A/C systems

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 Four Seasons 39177 valve matches the original part’s mounting hole pattern and fitting sizes. Use appropriate sealing washers on all liquid inlet and outlet connections to prevent leaks. Avoid overtightening fittings to maintain the integrity of the sealing washers. Proper installation will help maintain system efficiency and prevent refrigerant loss.

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39177 meets or exceeds OEM quality standards, ensuring dependable performance in automotive HVAC systems. Manufactured with precision aluminum components and designed for R134a refrigerant compatibility, this valve supports long-term durability. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality controls and reliability benchmarks.