Dayco 70758 Radiator Coolant Hose - Upper

Dayco Curved Radiator Hose 70758

Dayco 70758 is a curved radiator coolant hose built for upper cooling-system routing on select Ford vans and Chevrolet Corvette applications. Made from EPDM rubber with 1 1/2-inch inside diameters at both ends, it provides a direct replacement option for vehicles that need a formed hose with the correct bend and SAE J20R4 Class D-1 / SAE J1684 Type EC compliance.

The Dayco Curved Radiator Hose line is engineered for vehicle-specific cooling layouts where a straight hose will not follow the factory path. This hose is a practical OE-style replacement for upper radiator connections on 1969-1982 Ford E-Series vans and 1969-1976 Chevrolet Corvette models, including applications with air conditioning and specific radiator sizes noted in the fitment data.

Key Features

• EPDM construction for cooling-system durability
• Black finish for a factory-style appearance
• 1 1/2-inch inside diameter at both ends
• Single I.D. hose design for upper radiator routing
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved hose profile for factory-style fitment
• Dayco part number 70758

Fitment Details

• Fits 1982 Ford E-250 Econoline Club Wagon, upper; 26 In. Rad.; Curved Radiator Hose
• Fits 1982 Ford E-250 Econoline Club Wagon, upper; 30 In. Rad.; Curved Radiator Hose
• Fits 1982 Ford E-350 Econoline, upper; 26 In. Rad.; Curved Radiator Hose
• Fits 1982 Ford E-350 Econoline, upper; 30 In. Rad.; Curved Radiator Hose
• Fits 1982 Ford E-350 Econoline Club Wagon, upper; 26 In. Rad.; Curved Radiator Hose
• Fits 1982 Ford E-350 Econoline Club Wagon, upper; 30 In. Rad.; Curved Radiator Hose
• Fits 1981 Ford E-250 Econoline, upper; 26 7/32 In. Rad.; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1981 Ford E-250 Econoline Club Wagon, upper; 26 7/32 In. Rad.; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-250 Econoline Club Wagon, upper; 26 7/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-250 Econoline Club Wagon, upper; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1981 Ford E-350 Econoline, upper; 26 7/32 In. Rad.; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-350 Econoline, upper; 26 7/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-350 Econoline, upper; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1981 Ford E-350 Econoline Club Wagon, upper; 26 7/32 In. Rad.; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-350 Econoline Club Wagon, upper; 26 7/32 In. Rad.; Curved Radiator Hose
• Fits 1980-1981 Ford E-350 Econoline Club Wagon, upper; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1980 Ford E-100 Econoline, upper; Curved Radiator Hose
• Fits 1980 Ford E-250 Econoline, upper; 26 7/32 In. Rad.; Curved Radiator Hose
• Fits 1980 Ford E-250 Econoline, upper; 30 13/32 In. Rad.; Curved Radiator Hose
• Fits 1980 Ford E-250 Econoline, upper; Curved Radiator Hose
• Fits 1980 Ford E-250 Econoline Club Wagon, upper; Curved Radiator Hose
• Fits 1980 Ford E-350 Econoline, upper; Curved Radiator Hose
• Fits 1980 Ford E-350 Econoline Club Wagon, upper; Curved Radiator Hose
• Fits 1976 Chevrolet Corvette, upper; Early; Curved Radiator Hose
• Fits 1971-1975 Chevrolet Corvette, upper; Curved Radiator Hose
• Fits 1970 Chevrolet Corvette, upper; Late; Curved Radiator Hose
• Fits 1969 Chevrolet Corvette, upper; Compatible with vehicles containing air conditioning.; Curved Radiator Hose

What This Hose Helps Address

• Upper radiator hose leaks caused by age, heat, and coolant exposure
• Cracking, hardening, or swelling in the original hose
• Incorrect hose routing on Ford E-Series cooling systems
• Replacement needs for Corvette upper radiator hose service
• Cooling-system maintenance on vehicles with factory curved hose routing

Installation Notes and Tips

Verify the radiator size and upper hose routing before installation, especially on 1980-1982 Ford E-Series applications with multiple radiator configurations. Confirm both hose ends match the 1 1/2-inch inside diameter specification and inspect the necks, clamps, and adjoining cooling components for wear before installing Dayco 70758.

For 1969-1976 Chevrolet Corvette and 1980-1982 Ford E-Series fitments, compare the original hose shape to the replacement hose to ensure the curved profile follows the factory path without kinking or tension. This part cross-references Gates 20809 for the same application.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, supporting consistent material and dimensional requirements for radiator coolant service. The EPDM construction is selected for use in engine-cooling environments where heat and coolant exposure are routine.