Four Seasons 90746 HVAC Heater Core - Front

Four Seasons 90746 Heater Core Overview

The Four Seasons 90746 heater core is an aluminum HVAC heater core built for front-position heating systems in select Ford Econoline vans. It measures 7-5/8 in. long, 7-1/4 in. wide, and 1-7/8 in. thick, with 3/4 in. inlet and outlet tubes for a direct-fit style replacement.

For Ford E-150 Econoline, E-250 Econoline, and E-350 Econoline applications, this heater core is listed to meet or exceed OEM requirements and is sized for the front HVAC case.

Key Features

• Four Seasons Heater Core line, part number 90746
• Aluminum core construction for efficient heat transfer
• Core dimensions: 7.625 in. height, 7.250 in. width, 1.875 in. depth
• 3/4 in. tube connections on both inlet and outlet
• Meets or exceeds OEM specifications
• Front-position fitment for select Ford Econoline vans

Detailed Product Description

The Four Seasons 90746 is an aluminum heater core designed for the HVAC system in 1988-1991 Ford E-150 Econoline, E-250 Econoline, and E-350 Econoline models, including Club Wagon variants. Fitment includes 1988 vehicles with 45-degree tubes from 1/88, 1989 vehicles equipped with air conditioning, and 1990-1991 front heater core applications. This part number 90746 is also cross-referenced to Four Seasons 98584 for the same application.

As part of the Four Seasons Heater Core product line, this unit focuses on OE-style dimensions and tube sizing to support proper heater box fitment and coolant flow. The aluminum style helps maintain thermal efficiency in the vehicle’s cabin heating circuit.

What This Heater Core Helps Address

• Weak or uneven cabin heat in the front HVAC system
• Coolant leakage from a worn heater core
• Restricted heat output caused by internal corrosion or blockage
• Fitment issues when replacing the original Ford Econoline heater core
• Restoring heater performance in E-150, E-250, and E-350 Econoline vans

Installation Notes and Tips

Verify the vehicle year, model, and HVAC configuration before ordering, especially for 1988 vehicles with 45-degree tubes and 1989 vehicles equipped with air conditioning. Confirm the core dimensions and 3/4 in. tube size against the original unit before installation. Proper cooling system service, including inspection of hoses and coolant condition, helps support a clean heater core replacement.

Quality Assurance

The Four Seasons 90746 heater core is listed as meeting or exceeding OEM specifications for the stated applications. Four Seasons heater core parts are built to match the dimensional and functional requirements of the original HVAC system in the covered Ford Econoline models.