One Stop Solutions 98571 HVAC Heater Core

OE-Style Heater Core Replacement

Restore cabin heat with this One Stop Solutions HVAC heater core, part number 98571. It is built as a direct replacement for OE-style applications and is engineered for Ford and Mercury vehicles that need a dependable heater core for the heating system.

Fits 1968-1979 Ford and Mercury applications listed below, including Ford Bronco, F-100, F-150, F-250, F-350, Thunderbird, Mustang, and Mercury Cougar, Monarch, and Montego configurations without air conditioning or with high output heater setups.

• Drop-in fit, form, and function for listed applications
• Premium-grade aluminum construction for added durability
• Cadmium-plated tubes inside and out to help resist premature failure
• Individually pressure tested before release
• Includes necessary foam and accessories for installation
• Built to address original design weaknesses in higher-mileage vehicles
• Uses cycle, vibration, burst, and environmental testing methods

Detailed Product Overview

The One Stop Solutions 98571 heater core is designed as a direct replacement for original equipment units in classic Ford and Mercury heating systems. This aluminum heater core is made to match OE form and function while using premium materials and protective tube plating to improve service life. It is a practical choice for restoring heat output in vehicles such as the Ford Mustang, Ford Bronco, and Mercury Montego when the original core has leaked, clogged, or lost efficiency.

This part cross-references APDI 9010046 for the same application.

Common Problems This Part Can Address

• Coolant odor inside the cabin from a leaking heater core
• Weak or uneven heat output from restricted coolant flow
• Fogging windows caused by heater core seepage
• Loss of cabin heat in high-mileage Ford and Mercury vehicles
• Failure of the original copper-style core due to age and corrosion

Installation Notes

Verify the vehicle’s heater configuration before ordering. This part is listed for w/o AC and high output heater applications only, depending on the vehicle. Compare the original core dimensions, hose connections, and mounting points to confirm a proper match before installation.

Professional installation is recommended for classic HVAC service, especially when access to the heater case is limited. Flush the cooling system and inspect hoses, clamps, and related HVAC components before installing the new core.

Quality Assurance

Each heater core is individually pressure tested and manufactured using aluminum construction with cadmium-plated tubes. OSC Premium heater cores are built to OE-style form and function and undergo cycle, vibration, burst, and environmental testing to help verify durability before shipment.

• Fits 1978-1979 Ford Bronco, w/o AC
• Fits 1973-1979 Ford F-100, High Output Heater
• Fits 1975-1979 Ford F-150, High Output Heater
• Fits 1973-1979 Ford F-250, High Output Heater
• Fits 1973-1979 Ford F-350, High Output Heater
• Fits 1977-1978 Ford Thunderbird, w/o AC
• Fits 1974-1978 Mercury Cougar, w/o AC
• Fits 1975-1978 Mercury Monarch, w/o AC
• Fits 1968-1976 Mercury Montego, w/o AC
• Fits 1971-1973 Ford Mustang, w/o AC