HomeHVAC > Motors, Core, Case and Related ComponentsFour Seasons 98581A HVAC Heater Core
Part #: 98581A

Four Seasons 98581A HVAC Heater Core

Heater Core
⚙️ 19 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Core
🚗Fitment: Ford, Lincoln, and Mercury, Continental, Grand Marquis, LTD, and Marquis
🔄Easy Returns — Return within 60 days for a full refund
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Reliable HVAC Heater Core for Ford, Lincoln, and Mercury Vehicles

The Four Seasons Heater Core 98581A is designed to restore efficient heating performance in select Ford, Lincoln, and Mercury models. Engineered with durable aluminum construction, this heater core ensures consistent warmth and comfort during colder months.

  • Core dimensions: 6 inches length, 9-3/8 inches width, 1-7/8 inches thickness
  • Constructed from corrosion-resistant aluminum material
  • Core depth of 1.875 inches and height of 6 inches for precise fitment
  • Tube sizes: 0.625 inch (15.875 mm) and 0.750 inch (19.05 mm)
  • Meets or exceeds OEM specifications for reliable performance
  • Non-adjustable pipe positioning for direct replacement

Product Details and Specifications

This Four Seasons Heater Core 98581A is part of the Heater Core product line, which focuses on delivering quality HVAC components tailored to specific vehicle applications. The aluminum heater core design offers enhanced heat transfer and resistance to corrosion compared to traditional materials. With exact core dimensions and tube sizes, this heater core is engineered to fit Ford Continental, Lincoln Continental, Mercury Marquis, Grand Marquis, and LTD models, ensuring proper integration with the vehicle’s heating system.

Compatible Vehicles and Common Applications

This heater core is compatible with the following makes and models:

  • Ford Continental
  • Lincoln Continental
  • Mercury Marquis
  • Mercury Grand Marquis
  • Mercury LTD

It is designed to address heating system issues such as:

  • Insufficient cabin heat output
  • Coolant leaks inside the vehicle
  • Overheating due to clogged or damaged cores
  • Unpleasant odors from a failing heater core
  • Fogging or moisture buildup on interior windows

Installation Notes and Tips

When replacing the heater core 98581A, ensure the vehicle’s cooling system is properly drained before removal. Due to the non-adjustable pipe positioning, this part is a direct fit replacement, simplifying installation. It is recommended to inspect and replace any worn hoses or seals during installation to prevent future leaks. Proper reassembly and coolant refilling are essential to restore full heating functionality.

Quality Assurance and Warranty

The Four Seasons Heater Core 98581A meets or exceeds OEM standards, providing dependable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to withstand typical wear and tear. While specific warranty details are not provided, Four Seasons products generally adhere to strict quality control measures to ensure customer satisfaction and long-term reliability.

BrandFour Seasons
Part Number98581A
PositionHeater Core
Length6
Thickness1-7/8
Width9-3/8
Core MaterialAluminum
Adjustable Pipe PositioningNo
Core Depth IN1.875
Core Height IN6.000
Core Width IN9.375
DescriptionHeater cores
Meets / Exceeds OEM?Yes
StyleAluminum heater core
Tube 1 IN0.625
Tube 1 MM15.875
Tube 2 IN0.750
Tube 2 MM19.050
TypeHeater core /aluminum

This part fits 19 vehicles. Search below:

YearMakeModelSubmodelPositionNotes
1979LincolnContinentalN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976FordLTDN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976FordLTDBaseN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976FordLTDLandauN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976FordLTDBroughamN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976LincolnContinentalN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976MercuryGrand MarquisN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976MercuryMarquisBaseN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1976MercuryMarquisBroughamN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975FordLTDN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975FordLTDBaseN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975FordLTDLandauN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975FordLTDBroughamN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975LincolnContinentalN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975MercuryGrand MarquisN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975MercuryMarquisBaseN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1975MercuryMarquisBroughamN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1974LincolnContinentalN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1973LincolnContinentalN/ACompatible with vehicles equipped with air conditioning.; Heater Core

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

10040515626021711015181175922092284250201250293279310398019554581609354660352168807022098019901028990312945819858198581AC9AZ18476BD3AZ18476AD3HE18476AD5AZ18476AD9HH18476AAD9HZ18476AD9VY18476AFM90312H2299HT398019ZH293

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.