Four Seasons 98522 HVAC Heater Core - Rear

Heater Core for Ford High Output Applications

Four Seasons 98522 is an aluminum HVAC heater core built for select Ford trucks and Bronco models from the 1980s and mid-1980s. It is sized for the listed applications and meets or exceeds OEM requirements for direct replacement service.

Key Features

• Aluminum heater core construction
• Core dimensions: 7 in. length, 7-1/4 in. width, 1-7/8 in. thickness
• Core height: 7 in.; core depth: 1.875 in.; core width: 7.25 in.
• Tube size: 0.625 in. / 15.875 mm on both connections
• Meets or exceeds OEM specifications
• Four Seasons Heater Core line for HVAC replacement service

Detailed Description

Four Seasons 98522 is an aluminum heater core designed for HVAC systems that require the listed dimensions and tube sizing. This heater core is a direct-fit replacement for select Ford F-100, F-150, F-200, F-250, F-350, and Bronco applications, including 1980-1984 Ford F-100, 1980-1984 Ford F-150, 1980-1984 Ford F-250, 1980-1984 Ford F-350, 1980-1983 Ford F-100, 1985-1986 Ford Bronco rear, 1985-1986 Ford F-150, 1985-1986 Ford F-250, 1985-1986 Ford F-350, and 1986 Ford F-200. It is a practical replacement for vehicles with high output heater setups and the listed no-AC configurations.

The Four Seasons Heater Core line focuses on replacement HVAC components built to match OE-style fit and function. Part number 98522 is also referenced as Four Seasons 90040 for the same application. This part cross-references Hella (e.g., 9004) for the same application.

What It Helps Fix

• Loss of cabin heat from a leaking or restricted heater core
• Coolant odor inside the cab
• Fogging or film on the windshield caused by heater core leakage
• Uneven or weak heat output from the HVAC system
• Cooling system coolant loss traced to the heater core circuit

Installation Notes and Tips

Verify the vehicle’s heater configuration, including high output heater and no-AC or rear application details, before ordering. Compare the existing core dimensions and tube size to the specifications listed here to confirm proper fitment. Flush the cooling system and inspect hoses, clamps, and seals during replacement to reduce repeat contamination and leaks.

Quality Assurance

Four Seasons 98522 meets or exceeds OEM requirements for the listed applications. The aluminum construction and OE-style sizing support reliable replacement in compatible Ford HVAC systems.