Four Seasons 54586 A/C Evaporator Core

Four Seasons 54586 Evaporator Core

Four Seasons 54586 is an aluminum plate-and-fin A/C evaporator core built for HVAC service in select Chevrolet Camaro and Pontiac Firebird applications. With a core width of 13-5/8 inches, height of 7-1/4 inches, and depth of 3-9/16 inches, it matches the dimensional requirements needed for proper cabin cooling performance.

Key Features

• Brand: Four Seasons Evaporator Core line
• Part number: 54586
• Aluminum plate & fin construction
• Core dimensions: 13-5/8 in. wide x 7-1/4 in. high x 3-9/16 in. deep
• Male insert O-ring inlet and outlet fittings
• Inlet fitting outside diameter: No. 8
• Outlet fitting outside diameter: No. 10
• Includes OE-style O-ring and orifice tube references for service matching

Product Details

The Four Seasons Evaporator Core product line focuses on replacement HVAC components that match the physical and connection requirements of the original system. This evaporator core uses aluminum plate-and-fin construction for efficient heat transfer and features male insert O-ring fittings for the inlet and outlet connections. Four Seasons 54586 is a direct-fit style replacement for service work on 1988-1992 Chevrolet Camaro and 1988-1992 Pontiac Firebird HVAC systems, including 1988 models with a vertical inlet tube note.

This part cross-references AMS Automotive 6603 and WAI 6603N for the same application.

Used For

• Restoring A/C cooling performance when the evaporator core is leaking
• Replacing a restricted or internally corroded evaporator core
• Addressing weak airflow temperature control in the HVAC case
• Repairing refrigerant loss at the evaporator connection points
• Servicing Chevrolet Camaro and Pontiac Firebird cabin cooling systems

Installation Notes

Verify the core width, height, and depth against the original unit before installation. Confirm male insert O-ring fitting orientation, inlet size No. 8, and outlet size No. 10 to ensure proper connection alignment. For 1988 Chevrolet Camaro and 1988 Pontiac Firebird applications, check the vertical inlet tube note before ordering or installing. Always inspect the HVAC case, seals, and related A/C components during replacement to help prevent repeat leaks.

Quality Assurance

Four Seasons supplies replacement HVAC components with application-specific dimensions and fitting styles intended to match the original system layout. This evaporator core is built from aluminum and follows the listed OE-style connection and size specifications for service on compatible Camaro and Firebird models.