Four Seasons 54590 A/C Evaporator Core

Overview of Four Seasons Evaporator Core 54590

The Four Seasons Evaporator Core 54590 is designed for reliable HVAC performance in select Buick, Oldsmobile, and Pontiac vehicles. This A/C evaporator core is engineered to meet the specific cooling needs of models such as the Buick LeSabre, Oldsmobile 88, and Pontiac Bonneville.

• Compatible with Buick, Oldsmobile, and Pontiac models including 88, 98, Bonneville, LeSabre, LSS, Park Avenue, and Regency
• Part number 54590 ensures precise fitment and function
• Constructed from durable aluminum with plate and fin design for efficient heat exchange
• Dimensions approximately 13.375" to 13.5" width, 7.875" to 8" height, and 2.875" depth
• Features male insert o-ring inlet and female o-ring outlet fittings with No. 12 outlet diameter
• Includes green o-rings ([23682] and [23678]) for secure sealing

Four Seasons Evaporator Core Product Line Details

The Evaporator Core line by Four Seasons focuses on delivering reliable HVAC components that maintain factory specifications. This product line emphasizes quality materials such as aluminum and a plate and fin core design to optimize cooling efficiency and durability. The 54590 evaporator core is part of this line, providing a direct replacement solution for specific GM vehicles to restore proper air conditioning function.

Product Specifications and Features

This A/C evaporator core measures approximately 13.375 to 13.5 inches in width, 7.875 to 8 inches in height, and 2.875 inches in depth, matching OEM dimensions for a precise fit. The core depth is 2-7/8 inches (73.025 mm), height is 7-7/8 inches (200.025 mm), and width is 13-3/8 inches (339.725 mm). It uses a plate and fin design constructed from aluminum, which supports efficient heat transfer and corrosion resistance. The inlet fitting is a male insert with an o-ring seal, while the outlet fitting is a female o-ring type with a No. 12 outside diameter, ensuring secure connections within the HVAC system. The included green o-rings ([23682] and [23678]) provide reliable sealing to prevent refrigerant leaks.

Common Applications and Issues Addressed

• Restores proper cooling performance in Buick LeSabre and Pontiac Bonneville A/C systems
• Replaces leaking or clogged evaporator cores causing reduced airflow or refrigerant loss
• Solves issues related to unpleasant odors or moisture buildup inside the vehicle cabin
• Addresses HVAC system failures due to corrosion or physical damage of the evaporator core
• Improves overall air conditioning efficiency and passenger comfort

Installation Notes and Tips

Installation of the Four Seasons Evaporator Core 54590 requires disassembly of the vehicle’s HVAC housing. Ensure all refrigerant is properly evacuated before removal. Verify the correct orientation of the male insert and female o-ring fittings during installation to prevent leaks. Replace all o-rings with the included green o-rings to maintain a secure seal. It is recommended to inspect the entire A/C system for additional wear or damage while replacing the evaporator core.

Quality Assurance and Warranty

Four Seasons manufactures the Evaporator Core 54590 to meet or exceed OEM standards using durable aluminum materials and precise engineering. The product line is known for consistent quality and fitment accuracy. While specific warranty details are not provided here, Four Seasons typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.