CSF 3781 Radiator

Overview of CSF Radiator for Honda Civic

The CSF radiator part number 3781 is designed specifically for Honda Civic models, providing reliable cooling performance. Featuring an aluminum core and plastic tanks, this radiator supports efficient heat dissipation to maintain optimal engine temperature.

• Core thickness: 1 1/4 inches
• Core width: 17 11/16 inches
• Core length: 26 9/16 inches
• Aluminum core material with plastic tanks
• Cross flow design with one core row
• Inlet and outlet diameter: 1 1/4 inches (left inlet, right outlet)
• Cap not included

Detailed Radiator Specifications

This CSF radiator (part number 3781) features a cross flow design that enhances coolant flow efficiency for Honda Civic vehicles. The aluminum core provides lightweight durability and effective heat transfer, while the plastic tanks reduce overall weight without compromising strength. The radiator core measures 1 1/4 inches thick, 17 11/16 inches wide, and 26 9/16 inches long, ensuring proper fitment and cooling capacity. Both the inlet and outlet have a diameter of 1 1/4 inches, positioned on the left and right sides respectively, matching OEM specifications for seamless installation.

Common Applications and Problem Solving

• Replaces leaking or cracked radiators in Honda Civic models
• Addresses overheating issues caused by inefficient cooling
• Restores proper coolant flow with OEM-style plastic tanks and aluminum core
• Solves radiator core damage from corrosion or impact
• Improves engine temperature regulation for consistent performance

Installation Notes and Tips

When installing the CSF radiator 3781 on a Honda Civic, ensure all hose connections match the 1 1/4 inch inlet and outlet diameters. Verify the cross flow orientation aligns with the vehicle’s cooling system layout. Since the radiator does not include a cap, reuse the existing OEM cap or purchase a compatible replacement. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal coolant circulation.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards, featuring durable aluminum cores and plastic tanks designed for longevity. This radiator is free of hazardous materials and undergoes quality control to ensure reliable performance. Warranty details should be confirmed with the distributor or manufacturer, as coverage may vary.