Dayco 70423 Radiator Coolant Hose - Lower or Upper

Dayco 70423 Curved Radiator Hose Overview

Dayco 70423 is a curved radiator coolant hose built for lower cooling-system routing on select Ford trucks. This dual I.D. hose uses EPDM construction and follows SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for service in coolant applications.

Compatible with 1962-1964 Ford F-100, lower; 1962-1964 Ford F-250, lower; and 1962-1964 Ford F-350, lower, this hose is sized with a 1 3/4-inch inside diameter at one end and a 2-inch inside diameter at the other. The Dayco 70423 is a direct-fit style replacement for the lower radiator hose path on these classic Ford trucks.

Key Features

• EPDM rubber construction for coolant-system use
• Dual I.D. hose design with 1 3/4-inch and 2-inch inside diameters
• Curved radiator hose profile for lower hose routing
• Black finish for a factory-style appearance
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Dayco 70423 part number for accurate ordering and cross-reference

Product Details

The Dayco Curved Radiator Hose line focuses on replacement hoses shaped for specific cooling-system layouts, helping maintain proper coolant flow where a straight hose will not match the factory routing. This Dayco 70423 hose is formed for lower radiator use and is sized to transition between different connection diameters, making it a practical replacement for original equipment-style applications on 1962-1964 Ford F-100, F-250, and F-350 trucks. This part cross-references Ford C2TA-8286-B and Gates 21256 for the same application.

What This Hose Helps Address

• Cracked or aged lower radiator hose material
• Coolant leaks at the hose connection points
• Improper hose fitment from incorrect diameter matching
• Restricted cooling-system routing caused by a misshaped replacement hose
• Service replacement needs on classic Ford F-100, F-250, and F-350 trucks

Installation Notes and Tips

Verify the lower hose routing, end diameters, and overall shape before installation. Match the hose to the radiator and engine connection sizes, and inspect the mating necks, clamps, and surrounding cooling-system components for wear before reassembly. Confirm fitment by vehicle year, make, model, and position: Fits 1962-1964 Ford F-100, lower; Fits 1962-1964 Ford F-250, lower; Fits 1962-1964 Ford F-350, lower.

Quality Assurance

Dayco manufactures this hose to meet published SAE material and performance specifications for radiator coolant service. The EPDM construction and formed profile support consistent replacement quality for the listed Ford truck applications.