Four Seasons 98609 HVAC Heater Core - Front

Four Seasons Heater Core 98609 Overview

Four Seasons 98609 is an aluminum HVAC heater core built for direct replacement service in select Jeep applications. With OEM-matching dimensions and aluminum core construction, it supports efficient cabin heat transfer for Jeep CJ5, CJ7, and Scrambler models listed below.

Key Features

• Aluminum heater core construction for HVAC service
• Core dimensions: 7-7/8 in. height, 6-1/8 in. width, 2 in. depth
• Tube size: 0.625 in. / 15.875 mm
• Meets or exceeds OEM requirements
• Four Seasons heater core line for replacement HVAC components
• Part number 98609 for catalog and fitment lookup

Detailed Product Description

The Four Seasons Heater Core 98609 is an aluminum replacement heater core designed for Jeep HVAC systems that use this size and tube configuration. Its 7-7/8 inch height, 6-1/8 inch width, and 2 inch depth help it align with the original heater box layout, while the aluminum core material supports heat exchange in the cabin heater circuit. This part number 98609 is listed for 1977-1984 Jeep CJ7, 1981-1984 Jeep Scrambler, 1977-1983 Jeep CJ5, plus 1985-1986 Jeep CJ7 and 1985 Jeep Scrambler applications noted as heater core service positions.

Four Seasons heater core products are positioned as replacement HVAC components for repair work where the original core has leaked, restricted flow, or no longer delivers consistent heat. This Four Seasons heater core 98609 also cross-references APDI 9010142 for the same application.

Vehicle Fitment

• Fits 1985-1986 Jeep CJ7, N/A, Heater Core
• Fits 1985 Jeep Scrambler, N/A, Heater Core
• Fits 1977-1984 Jeep CJ7, Front, Heater Core
• Fits 1981-1984 Jeep Scrambler, Front, Heater Core
• Fits 1977-1983 Jeep CJ5, Front, Heater Core

Common Repair Uses

• Restores cabin heat when the original heater core is leaking
• Addresses poor heater output caused by a restricted or clogged core
• Replaces a corroded or damaged HVAC heater core
• Supports repair of coolant odor or moisture inside the heater box area
• Helps return proper defrost and cabin heating performance in Jeep CJ5, CJ7, and Scrambler models

Installation Notes and Tips

Verify heater box dimensions, tube size, and hose routing before installation. Compare the original core height, width, and depth to the listed specifications to confirm proper seating in the HVAC case. Flush the cooling system and inspect hoses, clamps, and the heater control valve during replacement to reduce repeat contamination or flow issues.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM requirements. The aluminum construction and application-specific sizing support replacement service for the listed Jeep models.