Denso 221-3406 Radiator

Overview of the Denso 221-3406 Radiator for Infiniti and Nissan

The Denso 221-3406 radiator is engineered for reliable cooling performance in select Infiniti and Nissan vehicles. Designed specifically for models like the Armada, QX56, and TITAN, this radiator ensures efficient heat dissipation and includes a transmission oil cooler for enhanced functionality.

• Core Height: 23.5 inches
• Core Width: 26.812 inches
• Core Thickness: 0.937 inches
• Inlet Diameter: 1.375 inches
• Outlet Diameter: 1.375 inches
• Includes Transmission Oil Cooler

Detailed Specifications and Features

This radiator features a core height of 23.5 inches and a width of 26.812 inches, providing ample surface area for effective engine cooling. The core thickness of 0.937 inches supports optimal coolant flow and heat exchange. Both the inlet and outlet diameters measure 1.375 inches, ensuring compatibility with the vehicle’s existing cooling system hoses. The integrated transmission oil cooler adds an extra layer of protection by maintaining transmission fluid temperature, which is critical for the Infiniti Armada, QX56, and Nissan TITAN models during heavy-duty or towing applications.

Compatible Vehicles and Applications

This Denso radiator, part number 221-3406, is compatible with the following vehicles:

• Infiniti Armada
• Infiniti QX56
• Nissan TITAN

It is designed to replace original equipment radiators in these models, ensuring proper fit and function without modification.

Common Issues Addressed by the Denso 221-3406 Radiator

• Engine overheating due to inefficient heat dissipation
• Transmission fluid overheating during towing or heavy load conditions
• Coolant leaks from damaged or corroded radiator cores
• Reduced cooling system performance from clogged or worn radiators
• Incompatibility with OEM cooling system dimensions and fittings

Installation Notes and Tips

When installing the Denso 221-3406 radiator, ensure all hose connections match the 1.375-inch inlet and outlet diameters for a secure fit. Verify that the transmission oil cooler lines are properly connected to maintain transmission cooling. It is recommended to flush the cooling system before installation to remove any debris or contaminants. Use manufacturer-recommended coolant and check for leaks after installation. Professional installation is advised to maintain system integrity and performance.

Quality Assurance and Warranty Information

Denso radiators are manufactured to meet or exceed OEM specifications, providing reliable cooling system performance. The 221-3406 radiator undergoes rigorous quality control testing to ensure durability and fitment accuracy. While specific warranty details may vary, Denso typically offers a limited warranty covering defects in materials and workmanship. Consult the product documentation or supplier for exact warranty terms related to this radiator.