Four Seasons 98539 HVAC Heater Core

Four Seasons 98539 Heater Core Overview

Four Seasons 98539 is an aluminum HVAC heater core built for select classic GM applications with air conditioning. It is sized at 9-1/4 inches long, 6 inches wide, and 2-1/2 inches thick, with tube sizes of 0.625 in and 0.750 in for application-specific fitment.

This Four Seasons Heater Core line focuses on direct replacement coverage for vehicles that need a dependable cabin heat exchanger. For shoppers searching for a heater core for 1964-1968 Chevrolet Impala with air conditioning, or a heater core for 1964-1967 Pontiac GTO with air conditioning, part number 98539 is a relevant OE-style option.

Key Features

• Aluminum heater core construction
• Core dimensions: 9-1/4 in. length, 6 in. width, 2-1/2 in. thickness
• Tube sizes: 0.625 in. and 0.750 in.
• Meets or exceeds OEM requirements
• Direct-fit coverage for select classic Chevrolet, Buick, Oldsmobile, and Pontiac models
• Four Seasons part number 98539

Product Details

Four Seasons 98539 is an aluminum heater core designed for HVAC systems in select 1963-1968 vehicles, including Chevrolet Impala, Bel Air, and Malibu; Buick Skylark; Oldsmobile Cutlass and Cutlass Supreme; and Pontiac Bonneville, Catalina, GTO, LeMans, and Tempest. It is listed for vehicles equipped with air conditioning, making it a focused replacement for restoring cabin heat performance in compatible classic platforms. This part cross-references APDI 9010058 for the same application.

What It Helps Fix

• Weak or inconsistent cabin heat
• Coolant seepage from a worn heater core
• Restricted heat transfer inside the HVAC system
• Fogging or defrost performance issues caused by poor heater output
• Replacement needs during HVAC restoration on classic GM vehicles

Installation Notes and Tips

Verify vehicle equipment before ordering, since this heater core is listed for models equipped with air conditioning. Confirm core dimensions, tube sizes, and HVAC case fitment against the original unit before installation. Inspect hoses, clamps, and surrounding HVAC components during replacement to help avoid repeat labor.

Quality Assurance

Four Seasons 98539 is built to meet or exceed OEM specifications for the listed applications. The aluminum core construction supports reliable heat exchange in the intended HVAC system, and the part number 98539 is backed by Four Seasons application coverage for select classic Chevrolet, Buick, Oldsmobile, and Pontiac models.