Four Seasons 98734 HVAC Heater Core

Four Seasons 98734 Heater Core for Volvo HVAC Repair

Restore cabin heat and defrost performance with the Four Seasons 98734 heater core. This aluminum heater core is built to OEM-equivalent dimensions and meets or exceeds OEM requirements for a direct-fit HVAC repair on select Volvo models.

Compatible with Volvo S90, V90, 960, 940, 740, 780, 760, and 745 applications, this heater core is sized for the factory HVAC case and coolant flow path. Four Seasons Heater Core 98734 is a practical replacement when the original core is leaking, restricted, or no longer transferring heat efficiently.

Key Features

• Aluminum heater core construction
• Core dimensions: 8-7/8 in. length, 7-3/8 in. width, 2 in. thickness
• Tube size: 0.625 in. / 15.875 mm on both connections
• Meets or exceeds OEM specifications
• Direct replacement style for select Volvo HVAC systems
• Four Seasons part number 98734

Product Details

The Four Seasons heater core line focuses on replacement HVAC core components for passenger vehicles. Part number 98734 uses an aluminum core design with fixed pipe positioning and dimensions that match the listed Volvo applications. It is intended for vehicles that need a heater core replacement to restore proper coolant-to-air heat transfer inside the HVAC case. This part cross-references Spectra Premium 94734 for the same application.

Common Problems This Part Can Help Solve

• Weak or uneven cabin heat
• Coolant odor inside the vehicle
• Fogging or poor windshield defrost performance caused by heater core failure
• Visible coolant leakage from the HVAC housing
• Restricted coolant flow through a worn or clogged heater core

Installation Notes and Tips

Verify the vehicle’s year, model, and HVAC configuration before installation. Because heater core replacement often requires access to the HVAC case, inspect coolant hoses, clamps, and related seals during service. Confirm the tube size and core dimensions against the original unit before final assembly. Fits 1997-1998 Volvo S90, N/A. Fits 1997-1998 Volvo V90, N/A. Fits 1992-1997 Volvo 960, N/A. Fits 1991-1995 Volvo 940, N/A. Fits 1985-1992 Volvo 740, N/A. Fits 1987-1991 Volvo 780, N/A. Fits 1983-1990 Volvo 760, N/A. Fits 1985 Volvo 745, N/A.

Quality Assurance

Four Seasons 98734 is manufactured to meet or exceed OEM requirements for the listed Volvo heater core applications. Confirm fitment by matching the original part dimensions and vehicle application before installation.