Four Seasons 90799 HVAC Heater Core

Four Seasons 90799 Heater Core Overview

The Four Seasons 90799 heater core is an aluminum HVAC heater core built for direct replacement service in select Acura EL and Honda Civic applications. With OEM-level dimensions and aluminum core construction, it supports reliable cabin heat transfer for 1996-1998 Honda Civic and 1997-1998 Acura EL models.

Four Seasons Heater Core 90799 is part of the brand’s heater core line, focused on replacement components that match the original system layout and performance requirements. This aluminum heater core measures 7-7/8 inches long, 4-1/4 inches wide, and 1-1/4 inches thick, with 0.625-inch inlet and outlet tubes.

Key Features

• Aluminum heater core construction for efficient heat exchange
• Direct replacement dimensions: 7-7/8 in. length, 4-1/4 in. width, 1-1/4 in. thickness
• 0.625 in. tube size on both connections
• Meets or exceeds OEM requirements
• Compatible with select 1996-1998 Honda Civic and 1997-1998 Acura EL heater core applications
• Four Seasons 90799 cross-references Spectra Premium 94799 and UAC HT394178C for the same application

Detailed Description

Built as an aluminum heater core, the Four Seasons 90799 is intended for vehicles that use the listed HVAC heater core configuration. Its compact core size and standard tube dimensions help it align with factory-style heater box layouts, making it a practical replacement for a Honda Civic heater core or Acura EL heater core service job. For buyers searching by part number, Four Seasons 90799 offers a straightforward OE-style replacement path for the specified fitments.

Compatible With: 1996-1998 Honda Civic, HVAC heater core with aluminum design; 1996-1998 Honda Civic, copper/brass design; 1997-1998 Acura EL, HVAC heater core with aluminum design; 1997-1998 Acura EL, copper/brass design.

Common Problems This Part Can Address

• Weak or uneven cabin heat output
• Coolant leakage from the heater core assembly
• Restricted coolant flow through the HVAC heater circuit
• Fogging or moisture issues linked to heater core failure
• Loss of heat in 1996-1998 Honda Civic or 1997-1998 Acura EL vehicles

Installation Notes and Tips

Verify the heater core dimensions, tube size, and HVAC configuration before installation. Compare the original unit to Four Seasons 90799 to confirm fitment, especially on vehicles with aluminum or copper/brass heater core designs. Inspect hoses, clamps, and surrounding HVAC components during replacement to help prevent repeat leaks or restricted flow.

Quality Assurance

This heater core meets or exceeds OEM requirements and is manufactured as an aluminum replacement component for the listed applications. Four Seasons 90799 is engineered for direct-fit service in the specified Honda Civic and Acura EL model years.