Denso 221-3420 Radiator

Overview of the Denso Radiator 221-3420 for Infiniti and Nissan

The Denso radiator 221-3420 is designed specifically for Infiniti Pathfinder and Nissan QX4 models. This radiator includes a transmission oil cooler, ensuring efficient engine and transmission temperature management for these vehicles.

• Core Height: 19.687 inches
• Core Width: 27.062 inches
• Core Thickness: 0.625 inches
• Inlet Diameter: 1.375 inches
• Outlet Diameter: 1.375 inches
• Includes Transmission Oil Cooler

Detailed Specifications and Features

The Denso 221-3420 radiator features a core measuring 19.687 inches in height, 27.062 inches in width, and 0.625 inches in thickness. These dimensions provide optimal cooling surface area for the Infiniti Pathfinder and Nissan QX4. The radiator’s inlet and outlet diameters are both 1.375 inches, compatible with the factory cooling system hoses. Additionally, the integrated transmission oil cooler supports the vehicle’s transmission cooling needs, helping maintain proper operating temperatures under various driving conditions.

Compatible Vehicles and Applications

This radiator is compatible with the following vehicles:

• Infiniti Pathfinder
• Nissan QX4

It is designed to replace the original radiator and transmission oil cooler assembly, addressing issues related to engine overheating and transmission fluid temperature regulation.

Common Issues Addressed by the Denso Radiator 221-3420

• Engine overheating due to radiator core damage or clogging
• Transmission overheating caused by inefficient cooling
• Coolant leaks from worn or damaged radiator components
• Reduced cooling efficiency from corrosion or buildup
• Incompatible or damaged radiator inlet/outlet connections

Installation Notes and Tips

• Ensure compatibility with Infiniti Pathfinder or Nissan QX4 before installation
• Inspect and replace radiator hoses if necessary to match 1.375-inch inlet and outlet diameters
• Drain coolant and transmission fluid prior to removal of the old radiator
• Check for proper seating and secure all mounting points to avoid leaks
• Refill with manufacturer-recommended coolant and transmission fluid after installation

Quality Assurance and Warranty Information

Denso radiators are manufactured to meet OEM specifications for fit, form, and function. The 221-3420 radiator undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details may vary, Denso products typically include a limited warranty covering defects in materials and workmanship. Consult product documentation or the supplier for exact warranty terms.