Four Seasons 38891 A/C Expansion Valve - Rear

Reliable A/C Expansion Valve for Chevrolet, Oldsmobile, and Pontiac Vans

The Four Seasons Expansion Valve 38891 is designed to regulate refrigerant flow in your vehicle's air conditioning system. Engineered for use with R134a refrigerant, this brass TXV valve ensures precise temperature control and efficient cooling performance for select Chevrolet, Oldsmobile, and Pontiac models.

• Durable brass construction for long-lasting performance
• Compatible with R134a refrigerant systems
• Thermostatic expansion valve (TXV) type for accurate refrigerant metering
• Designed specifically for Chevrolet Lumina APV, Lumina Van, Pontiac Silhouette, and Oldsmobile Trans Sport
• OEM-quality replacement part with part number 38891

About the Four Seasons Expansion Valve Product Line

The Expansion Valve line from Four Seasons focuses on precise control of refrigerant flow within automotive A/C systems. This product line includes thermostatic expansion valves (TXV) like part number 38891, which are engineered to maintain optimal evaporator temperature and improve overall system efficiency. The Expansion Valve series is tailored to meet the specific requirements of various vehicle makes and models, ensuring compatibility and reliable operation.

Product Details and Specifications

This A/C expansion valve is constructed from brass, providing corrosion resistance and durability under typical automotive operating conditions. It is designed for use with R134a refrigerant, the standard refrigerant type for many modern vehicles. The TXV (thermostatic expansion valve) design allows the valve to adjust refrigerant flow based on temperature changes, helping maintain consistent cabin cooling. The Four Seasons 38891 expansion valve is compatible with Chevrolet Lumina APV and Lumina Van, Pontiac Silhouette, and Oldsmobile Trans Sport models, making it a suitable replacement for these vehicles' HVAC systems.

Common Applications and Issues Addressed

• Restores proper refrigerant flow in A/C systems
• Prevents evaporator freezing caused by incorrect refrigerant metering
• Improves cooling efficiency and temperature regulation
• Replaces faulty or leaking expansion valves
• Helps resolve inconsistent cabin temperature problems

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 38891, ensure the A/C system is properly evacuated and recharged with R134a refrigerant. Follow vehicle-specific service manual instructions for valve removal and installation. Verify that all connections are secure and leak-free before system recharge. Proper handling of the valve and refrigerant lines will help maintain system integrity and performance.

Quality Assurance and Warranty

Four Seasons expansion valves are manufactured to meet or exceed OEM standards for fit, form, and function. The 38891 part undergoes quality control testing to ensure reliable operation in compatible Chevrolet, Oldsmobile, and Pontiac vehicles. Warranty coverage details should be confirmed with the product documentation or supplier.