Dayco 71318 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Ford Cooling Systems

Dayco 71318 is a curved radiator coolant hose built for upper cooling-system routing on select Ford trucks with a dual air pump setup. It uses EPDM construction and a dual I.D. design to match the required hose transition between different connection sizes.

Compatible With 1985-1997 Ford F-350, upper; 1985-1996 Ford F-250, upper; and 1997 Ford F-250 HD, upper. This Dayco Curved Radiator Hose line is engineered for direct replacement applications where the original hose follows a formed bend and specific inlet and outlet diameters.

• EPDM rubber construction for coolant-system service
• Black finish for a factory-style appearance
• Dual I.D. hose design with 1 1/2 in. end 1 and 1 3/4 in. end 2
• Curved trunk height of 18 1/2 in. for formed routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits upper radiator hose locations on select Ford F-250, F-250 HD, and F-350 applications

Dayco 71318 is a radiator coolant hose for upper hose routing in cooling systems that require a curved profile and dual inside diameters. It is listed for Ford F-250, Ford F-250 HD, and Ford F-350 models with dual air pump notes, making it a practical replacement when the original hose shape, length, and connection sizes must match the factory layout. The Dayco 71318 part number is also referenced in aftermarket catalogs under several interchange numbers for the same application.

Common Cooling Issues This Hose Can Address

• Cracked or split upper radiator hose material
• Coolant leaks at the hose ends
• Incorrect hose shape after prior replacement
• Softening, swelling, or deterioration from heat and coolant exposure
• Fitment problems caused by mismatched inside diameters

Installation Notes and Tips

Verify the upper hose routing, end diameters, and dual air pump configuration before installation. Compare the original hose shape and connection sizes to the Dayco 71318 profile to confirm the correct replacement for your Ford cooling system. Inspect clamps, necks, and adjoining components for wear before installing the new hose.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and dimensional standards for coolant service.