Dayco 71734 Radiator Coolant Hose - Lower or Lower - Radiator To Oil Cooler

Curved Radiator Hose for Ford E-Series

Dayco 71734 is a curved radiator coolant hose built for Ford E-250 and E-350 Econoline applications that route coolant between the radiator and oil cooler. Made from EPDM rubber in black, this dual I.D. hose is shaped for the lower cooling-system path used on select 1990-1994 vans.

Key Features

• EPDM construction for coolant-system service
• Dual I.D. hose design with 1 11/16 in. and 1 23/32 in. inside diameters
• Curved hose profile for lower radiator-to-oil-cooler routing
• Black finish
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco Curved Radiator Hose line for formed cooling-system replacement

Detailed Description

Dayco 71734 is a radiator coolant hose for Ford E-250 Econoline Club Wagon, Ford E-350 Econoline, Ford E-350 Econoline Club Wagon, and Ford E-250 Econoline applications with lower radiator-to-oil-cooler routing. The curved shape and dual inside diameters help match the factory hose path on these vehicles, while the EPDM material is suited for hot coolant exposure in the engine bay. This part cross-references Motorcraft KM1919 and Gates 21064 for the same application.

The Dayco Curved Radiator Hose product line focuses on formed replacement hoses that follow original routing and connection sizes. For buyers searching for a Ford E-350 Econoline lower radiator hose, Ford E-250 Econoline Club Wagon oil cooler hose, or Dayco 71734 coolant hose, this part provides the correct formed profile for the listed applications.

What It Helps Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse in an original hose
• Improper hose routing at the radiator-to-oil-cooler connection
• Cooling-system service on Ford E-Series vans with oil cooler plumbing
• Replacement of a worn formed hose with the correct curved profile

Installation Notes and Tips

Verify the hose routing, end diameters, and vehicle configuration before installation. This hose is listed for lower positions, including lower radiator-to-oil-cooler and lower applications on the specified Ford E-250 and E-350 Econoline models. Inspect clamps, mating tubes, and nearby cooling-system components for wear or corrosion before installing the new hose.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for cooling-system service. Part number 71734 is built as a formed replacement hose for the listed Ford applications.