CSF 3697 Radiator

Overview of CSF 3697 Radiator for Toyota 4Runner and FJ Cruiser

The CSF 3697 radiator is designed specifically for Toyota 4Runner and FJ Cruiser models, providing reliable cooling performance. Featuring a 1 Row Plastic Tank Aluminum Core construction, this radiator balances durability and efficient heat dissipation for your vehicle's engine cooling system.

• Core Thickness: 7/8 inch
• Core Width: 23 1/4 inches
• Core Length: 25 9/16 inches
• Core Material: Aluminum
• Tank Material: Plastic
• Inlet Diameter: 1 5/16 inches (right side)
• Outlet Diameter: 1 5/16 inches (left side)
• Cross flow design with 1 core row
• Includes high-efficiency plate type oil cooler (9 13/16 inches)
• Cap not included (compatible with CSF cap number 4514)

Details on the 1 Row Plastic Tank Aluminum Core Product Line

The CSF 1 Row Plastic Tank Aluminum Core line combines OEM-style plastic tanks with an aluminum core to provide a balance of lightweight construction and effective cooling. This design supports efficient heat transfer while maintaining compatibility with factory mounting points and hose connections, making it suitable for direct replacement in Toyota 4Runner and FJ Cruiser vehicles.

Product Description and Specifications

The CSF part number 3697 radiator features a cross flow core design with a single row of aluminum tubes measuring 7/8 inch thick, 23 1/4 inches wide, and 25 9/16 inches long. The plastic tanks on either side are engineered to OEM specifications, ensuring proper fitment and durability. The inlet and outlet diameters are both 1 5/16 inches, positioned on the right and left sides respectively, facilitating straightforward hose connections. Additionally, this radiator includes a high-efficiency plate type oil cooler measuring 9 13/16 inches, which helps maintain optimal engine oil temperatures under demanding conditions.

Common Applications and Issues Addressed

• Replacement for leaking or damaged radiators in Toyota 4Runner and FJ Cruiser models
• Resolves overheating caused by clogged or inefficient cooling cores
• Addresses coolant leaks from cracked plastic tanks
• Improves engine oil cooling with integrated oil cooler
• Restores proper coolant flow with OEM-style inlet and outlet dimensions

Installation Notes and Tips

Installation of the CSF 3697 radiator should be performed by a qualified technician familiar with Toyota 4Runner and FJ Cruiser cooling systems. Ensure all hoses and clamps are inspected and replaced if necessary to prevent leaks. Note that the radiator cap is not included; use a compatible CSF cap number 4514 or OEM equivalent. Verify proper alignment of inlet and outlet connections to avoid hose strain. Bleed the cooling system thoroughly after installation to remove air pockets and ensure optimal performance.

Quality Assurance and Warranty Information

CSF radiators are manufactured to meet or exceed OEM standards, using high-quality aluminum cores and durable plastic tanks. The 3697 radiator undergoes rigorous testing to ensure leak-free operation and efficient cooling. While specific warranty details may vary, CSF products typically include a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.