Four Seasons 38901 A/C Expansion Valve - Rear

Reliable A/C Expansion Valve for Chrysler, Dodge, Ford, and Jeep

The Four Seasons Expansion Valve 38901 is engineered to regulate refrigerant flow in automotive air conditioning systems using R134a refrigerant. Designed for compatibility with various Chrysler, Dodge, Ford, and Jeep models, this aluminum block-type valve ensures precise temperature control and efficient A/C performance.

• Constructed from durable aluminum material with an aluminum finish
• Compatible with R134a refrigerant systems
• Block type design with 2 mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with specific thread sizes
• Includes green O-rings [24606] and [24608] for reliable sealing
• Meets or exceeds OEM specifications for dependable fit and function

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve line focuses on delivering precise refrigerant flow control components designed to meet OEM standards. The 38901 part is part of this line, offering a block-type expansion valve that supports efficient air conditioning operation across multiple vehicle makes and models. This product line emphasizes quality materials and exact fitment to maintain system integrity and performance.

Detailed Product Description and Specifications

This A/C expansion valve is crafted from aluminum, providing corrosion resistance and durability under typical automotive operating conditions. It is designed for use with R134a refrigerant and features a block-type configuration with two mounting holes for secure attachment. The valve includes female suction inlet and outlet fittings with thread diameters of No. 8 (3/4" - 18) and No. 10 (7/8" - 18), respectively. Similarly, the liquid inlet and outlet fittings are female with thread diameters No. 6 (5/8" - 18) and No. 8 (3/4" - 18). Both liquid inlet and outlet connections use O-ring seals to ensure leak-free operation. The included green O-rings [24606] and [24608] provide reliable sealing to maintain system pressure and refrigerant containment.

Common Applications and Issues Addressed

• Restores proper refrigerant flow in Chrysler Caravan and Jeep Cherokee A/C systems
• Resolves inconsistent cabin cooling in Ford F-150 and F-250 models
• Eliminates A/C system freeze-ups and pressure imbalances in Dodge Ram 50 and Plymouth Reliant
• Improves overall air conditioning efficiency in Mercury Cougar and Ford Mustang vehicles
• Prevents refrigerant leaks caused by worn or damaged expansion valves

Installation Notes and Tips

• Ensure system is evacuated and depressurized before removal of the old expansion valve
• Verify thread sizes and fitting types match vehicle specifications for proper installation
• Replace O-rings with the included green O-rings to maintain a secure seal
• Use proper torque specifications on mounting bolts to avoid damage
• Test the A/C system for leaks and proper operation after installation

Quality Assurance and Warranty

The Four Seasons Expansion Valve 38901 meets or exceeds OEM standards, ensuring reliable performance and fitment. Manufactured with high-quality aluminum and precision engineering, this valve is designed for long-term durability. Warranty coverage details should be confirmed with the product documentation or manufacturer.