Four Seasons 90769 HVAC Heater Core

Reliable Aluminum Heater Core for Nissan and Infiniti Vehicles

The Four Seasons Heater Core 90769 is designed to provide efficient heating performance for select Nissan and Infiniti models. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation.

• Core dimensions: 6.375 inches height, 6.125 inches width, 1.875 inches depth
• Constructed from corrosion-resistant aluminum material
• Tube diameter: 0.625 inches (15.88 mm) for both inlet and outlet tubes
• Compatible with Nissan D21, M30, Pathfinder, Pickup and Infiniti models
• Part number 90769 for precise fit and replacement

Product Line Details: Four Seasons Heater Core

The Four Seasons Heater Core product line focuses on delivering reliable HVAC components that meet or exceed OEM specifications. This aluminum heater core model 90769 is part of that line, offering a balance of durability and efficient heat exchange for vehicle heating systems. Its aluminum style construction helps resist corrosion and maintain performance over time.

Technical Description and Specifications

This heater core features a compact design with a core height of 6.375 inches, width of 6.125 inches, and depth of 1.875 inches, making it suitable for tight engine compartments. Both inlet and outlet tubes measure 0.625 inches (15.88 mm) in diameter, facilitating proper coolant flow. The aluminum material enhances heat dissipation and corrosion resistance, which is critical for maintaining HVAC system efficiency in Nissan D21, M30, Pathfinder, and Pickup models, as well as compatible Infiniti vehicles.

Common Applications and Problem Resolution

• Replaces leaking or clogged heater cores causing insufficient cabin heat
• Restores proper coolant flow through the heating system
• Eliminates coolant odors inside the vehicle
• Prevents engine overheating related to heater core failure
• Resolves fogging issues caused by heater core leaks

Installation Notes and Tips

When installing the Four Seasons Heater Core 90769, ensure the cooling system is fully drained before removal. Verify tube connections match the 0.625 inch diameter inlet and outlet tubes for a secure fit. Inspect surrounding HVAC components for wear or damage during replacement. Proper sealing and hose clamp tightening are essential to prevent leaks and maintain system integrity.

Quality Assurance and Warranty Information

Four Seasons manufactures this heater core to meet industry standards for durability and performance. The aluminum construction provides resistance to corrosion and wear. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.