Four Seasons 54686 A/C Evaporator Core

Four Seasons 54686 Evaporator Core Overview

The Four Seasons Evaporator Core 54686 is an aluminum tube-and-fin A/C evaporator core built for specific Isuzu HVAC applications. It measures 8-1/4 inches wide, 7 inches high, and 4-3/4 inches deep, with No. 8 female O-ring inlet and No. 10 male insert O-ring outlet fittings for the listed vehicle fitments.

Compatible With 1984-1991 Isuzu Trooper and 1984-1987 Isuzu Pickup applications, this evaporator core is a direct-fit HVAC service part for restoring cabin cooling performance. Four Seasons 54686 is also referenced by several interchange numbers used in the aftermarket.

Key Features

• Aluminum tube-and-fin evaporator core construction
• Core dimensions: 8-1/4 in. width, 7 in. height, 4-3/4 in. depth
• No. 8 female O-ring inlet fitting
• No. 10 male insert O-ring outlet fitting
• Includes O-ring service references for the listed fittings
• Fits select Isuzu Trooper and Isuzu Pickup HVAC systems

Detailed Product Description

Four Seasons 54686 is part of the Evaporator Core product line and is intended for vehicles using the specified O-ring connection style and core dimensions. The aluminum construction supports efficient heat transfer in the A/C system, while the tube-and-fin design matches common OEM-style evaporator layouts. For shoppers searching for a 1984-1991 Isuzu Trooper evaporator core or a 1984-1987 Isuzu Pickup A/C evaporator core, this part number provides a focused fitment match.

This part cross-references Gates 6825 for the same application. Four Seasons 54686 is also listed under interchange references used across the aftermarket, including T54686.

What This Part Helps Address

• Weak or inconsistent cabin cooling
• Refrigerant leakage at the evaporator core connections
• Restricted A/C heat exchange from a worn core
• HVAC performance loss in Isuzu Trooper and Isuzu Pickup systems
• Service replacement for a damaged or corroded evaporator core

Installation Notes and Tips

Verify the inlet and outlet fitting styles, core dimensions, and vehicle application before installation. This evaporator core uses O-ring style connections, so the sealing surfaces should be inspected carefully and the system should be evacuated, leak-checked, and recharged according to the vehicle service procedure after installation. Confirm the HVAC case and line routing on 1984-1991 Isuzu Trooper and 1984-1987 Isuzu Pickup models before final assembly.

Quality Assurance

Four Seasons is a recognized aftermarket brand for HVAC service components, and this evaporator core is built to match the listed application details and dimensional requirements for the specified Isuzu fitments.