Four Seasons 54587 A/C Evaporator Core

Four Seasons 54587 Evaporator Core

The Four Seasons 54587 evaporator core is a plate-and-fin A/C evaporator core built with an aluminum construction and OE-style male insert O-ring inlet and outlet fittings. It is specified for 1990 Buick Reatta, Buick Riviera, Cadillac Eldorado, Cadillac Seville, and Oldsmobile Toronado applications that use this evaporator core configuration.

Key Features

• Brand: Four Seasons Evaporator Core line
• Part number: 54587
• Plate & fin evaporator core design
• Aluminum core construction
• Male insert O-ring inlet and outlet fittings
• Core dimensions: 13-1/2 in. wide, 8 in. high, 2-7/8 in. deep
• Outlet fitting outside diameter: No. 12
• Includes OE-style O-ring interface details for service matching

Product Details

Four Seasons 54587 is part of the Evaporator Core product line, focused on replacement HVAC components that match the original system layout. This evaporator core uses a plate-and-fin aluminum design with the listed width, height, and depth dimensions to support proper fitment in the vehicle HVAC case. The male insert O-ring fittings and No. 12 outlet fitting outside diameter are important reference points when matching the part to the original air conditioning system. This part cross-references Dorman - HELP 56667 for the same application.

Fits 1990 Buick Reatta, N/A; Fits 1990 Buick Riviera, N/A; Fits 1990 Cadillac Eldorado, N/A; Fits 1990 Cadillac Seville, N/A; Fits 1990 Oldsmobile Toronado, N/A. Search terms such as 1990 Buick Riviera evaporator core, 1990 Cadillac Seville A/C evaporator core, and Four Seasons 54587 evaporator core apply to this listing.

Common Replacement Reasons

• Loss of cabin cooling performance
• Refrigerant leakage at the evaporator core
• Corrosion or damage to the aluminum core
• Restricted airflow through the HVAC evaporator assembly
• Incorrect fitment from a worn or mismatched replacement part

Installation Notes

Verify the core width, height, depth, and fitting style against the original unit before installation. Confirm the inlet and outlet use male insert O-ring connections and check the outlet fitting outside diameter to ensure system match. Inspect the HVAC case, seals, and O-rings during service so the replacement evaporator core can seat correctly and maintain proper refrigerant sealing.

Quality Assurance

Four Seasons evaporator cores are cataloged as direct replacement HVAC components with application-specific dimensions and fitting details for accurate service matching. The Four Seasons 54587 part number is listed with interchange references to support cross-checking during parts lookup and ordering.