Four Seasons 39378 A/C Expansion Valve - Rear

Overview of Four Seasons Expansion Valve 39378

The Four Seasons Expansion Valve 39378 is designed specifically for Suzuki XL-7 models, ensuring precise control of refrigerant flow in the vehicle's air conditioning system. Manufactured from durable aluminum, this block-type A/C expansion valve is engineered to meet or exceed OEM standards for reliable performance with R134a refrigerant.

• Constructed from corrosion-resistant aluminum material
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with specific thread diameters
• Includes green O-rings for proper sealing and leak prevention

Detailed Product Features and Specifications

The Four Seasons Expansion Valve 39378 features a block-type design that facilitates efficient refrigerant flow restriction within the A/C system of Suzuki XL-7 vehicles. It is made from aluminum, providing strength and resistance to corrosion. The valve includes two mounting holes for stable attachment. Both suction inlet and outlet fittings are female, with thread diameters of No. 10 and No. 12 respectively, and are non-threaded to accommodate O-ring seals. Similarly, the liquid inlet and outlet fittings are female with No. 6 and No. 10 thread diameters, also non-threaded, using captured and insert O-ring styles to ensure a tight seal. The valve is designed for use with R134a refrigerant, the standard for many modern automotive A/C systems.

About the Four Seasons Expansion Valve Product Line

The Expansion Valve product line by Four Seasons focuses on delivering precise refrigerant flow control components that meet or exceed OEM specifications. This line is engineered to provide reliable operation and compatibility with specific vehicle makes and models, such as the Suzuki XL-7. The 39378 part number is part of this line, offering a block-type valve design optimized for efficient A/C system performance and durability.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain optimal cooling efficiency
• Prevents A/C system freezing or overheating due to improper refrigerant metering
• Replaces faulty or worn expansion valves causing inconsistent cabin temperatures
• Addresses leaks or pressure drops in the A/C system related to valve failure
• Restores proper function in Suzuki XL-7 air conditioning systems using R134a refrigerant

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 39378 on a Suzuki XL-7, ensure the system is fully evacuated and free of contaminants before installation. Use the included green O-rings ([24610] and [24611]) to secure proper sealing on both liquid and suction fittings. The valve’s two mounting holes allow for stable attachment; verify alignment to avoid stress on fittings. Since the fittings are female and non-threaded, proper O-ring placement is critical to prevent leaks. Professional installation is recommended to maintain system integrity and performance.

Quality Assurance and Warranty

This Four Seasons Expansion Valve 39378 meets or exceeds OEM quality standards for fit, form, and function in Suzuki XL-7 vehicles. Manufactured with precision aluminum and designed for R134a refrigerant systems, it ensures durability and reliable operation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.