Four Seasons 98534 HVAC Heater Core

Four Seasons 98534 Heater Core Overview

Four Seasons 98534 is an aluminum HVAC heater core built for direct replacement in select classic GM and Pontiac applications. 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 the specified fitment.

Compatible With 1965-1968 Chevrolet Bel Air, 1966-1968 Chevrolet Caprice, 1968 Chevrolet El Camino, and select 1965-1969 Pontiac Bonneville, Catalina, Grand Prix, LeMans, and Tempest models equipped with air conditioning. Four Seasons 98534 is an OE-style aluminum heater core that meets or exceeds OEM requirements.

Key Features

• Aluminum heater core construction for HVAC service replacement
• Core dimensions: 9.250 in height, 6.000 in width, 2.500 in depth
• Tube sizes: 0.625 in and 0.750 in
• Meets or exceeds OEM specifications
• Direct-fit style for listed air-conditioned vehicles
• Four Seasons Heater Core line for HVAC core replacement applications

Detailed Description

Four Seasons 98534 heater core is engineered for vehicles that rely on a compact aluminum core to transfer heat from engine coolant into the cabin HVAC system. This part number is used across classic Chevrolet and Pontiac platforms, including Bel Air, Caprice, El Camino, Bonneville, Catalina, Grand Prix, LeMans, and Tempest applications with air conditioning. If you are replacing a leaking, restricted, or heat-loss heater core, this unit provides the dimensions and tube layout needed for the listed vehicles.

This part cross-references APDI 9010062 and Anchor 9061 for the same application.

Common Problems This Part Can Address

• Weak or inconsistent cabin heat
• Coolant odor inside the vehicle
• Fogging or film on the windshield from heater core leakage
• Restricted coolant flow through the HVAC core
• Visible coolant seepage from the heater core assembly

Installation Notes and Tips

• Verify the vehicle is equipped with air conditioning before ordering.
• Confirm core dimensions and tube orientation against the removed unit before installation.
• Inspect heater hoses, clamps, and coolant condition during replacement.
• Flush the cooling system if contamination or debris is present.
• Bleed air from the cooling system after installation to restore proper heater performance.

Quality Assurance

Four Seasons 98534 is listed as meeting or exceeding OEM requirements, supporting a specification-based replacement for the original heater core in the covered Chevrolet and Pontiac applications.