Dayco 71783 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Honda and Acura

Dayco 71783 is a curved radiator coolant hose built for upper cooling system routing on select Honda and Acura applications. It uses EPDM construction and a single I.D. hose design with 1 3/16-inch inside diameter ends for a direct-fit replacement on the listed vehicles.

This Dayco Curved Radiator Hose line is engineered for cooling system service where a formed hose is needed to follow the factory path without unnecessary stress at the connection points. Dayco 71783 is a practical replacement choice for Honda Accord, Acura TL, and Acura CL upper radiator hose service.

Key Features

• EPDM rubber construction for coolant hose service
• Black finish for OE-style appearance
• Single I.D. hose design
• 1 3/16-inch inside diameter at both ends
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved upper radiator hose profile for factory-style routing
• Cross-references Dayco 71783 for the same application

Detailed Description

Dayco 71783 is a radiator coolant hose for the upper position on select 1995-2002 Honda Accord, 1999-2003 Acura TL, and 2001-2003 Acura CL models. The EPDM material is suited for coolant exposure and everyday engine bay temperatures, while the curved shape helps the hose follow the original routing path. For buyers searching for a 2001-2003 Acura CL upper radiator hose, 1999-2003 Acura TL upper radiator hose, or 1995-2002 Honda Accord upper radiator hose, this part number provides a focused fitment match.

What It Helps Address

• Coolant leaks at the upper radiator hose connection
• Cracking, hardening, or swelling in an aging hose
• Restricted coolant flow caused by a deteriorated hose
• Improper hose routing from a worn or misshaped replacement
• Service replacement for a damaged Honda Accord, Acura TL, or Acura CL upper hose

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position fitment before installation. Inspect the radiator neck, thermostat housing, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm that the hose follows the factory curve without twisting so the cooling system maintains proper alignment.

Quality Assurance

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