Four Seasons 38604 A/C Expansion Valve

Overview of Four Seasons Expansion Valve 38604

The Four Seasons Expansion Valve 38604 is designed to regulate refrigerant flow in automotive air conditioning systems. This A/C expansion valve is compatible with select BMW and Mercedes-Benz models, ensuring precise temperature control and efficient cooling performance.

• Compatible with BMW 320i, 528e, 528i, 530i and Mercedes-Benz 300SD, 300TD, 380SL, 380SLC
• Constructed from durable brass for corrosion resistance
• Designed for R134a refrigerant systems
• Thermostatic expansion valve (Txv) type for accurate superheat control
• Super heat rating of 9.9 for optimal refrigerant flow regulation

Product Line Details: Four Seasons Expansion Valve

The Four Seasons Expansion Valve product line focuses on precise refrigerant flow restrictors tailored for automotive HVAC systems. This line includes thermostatic expansion valves (Txv) engineered to maintain consistent superheat levels, improving system efficiency and component longevity. The 38604 part exemplifies this approach by offering a brass construction and compatibility with R134a refrigerant, suitable for specific BMW and Mercedes-Benz vehicles.

Technical Description and Features

The Four Seasons Expansion Valve 38604 is a thermostatic expansion valve (Txv) designed to control the flow of R134a refrigerant within the vehicle’s air conditioning system. Its brass body provides durability and resistance to corrosion, essential for long-term operation. The valve maintains a super heat of 9.9, which helps optimize refrigerant vaporization and prevents liquid refrigerant from entering the compressor. This precise control supports consistent cooling performance in BMW 320i, 528e, 528i, 530i and Mercedes-Benz 300SD, 300TD, 380SL, 380SLC models.

Common Applications and Problem Solving

• Regulates refrigerant flow to prevent compressor damage
• Maintains proper superheat to improve A/C system efficiency
• Prevents overheating or freezing of evaporator coils
• Addresses inconsistent cabin cooling issues in BMW and Mercedes-Benz vehicles
• Replaces faulty or worn expansion valves in R134a systems

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 38604, ensure the system is properly evacuated and free of contaminants. Verify compatibility with the vehicle’s refrigerant type (R134a) and confirm fitment with the specific BMW or Mercedes-Benz model. Proper torque specifications should be followed to avoid leaks. It is recommended to replace the receiver/drier or accumulator during installation to maintain system integrity.

Quality Assurance and Warranty

Four Seasons manufactures the Expansion Valve 38604 to meet OEM standards for fit, form, and function. The brass construction and precise superheat rating contribute to reliable performance. While specific warranty details are not provided here, Four Seasons typically offers coverage against defects in materials and workmanship. Consult product documentation for exact warranty terms.