Dayco 73023 Radiator Coolant Hose - Lower

Dayco 73023 Curved Radiator Hose

The Dayco 73023 curved radiator hose is a lower coolant hose built for direct-fit service on select Scion xD applications. It uses EPDM construction and a dual I.D. hose design to match the required routing and connection sizes for the cooling system.

Compatible With 2008-2014 Scion xD, lower radiator hose applications, this part number 73023 is specified for the lower position and follows the curved hose shape needed for proper coolant flow path. The Dayco curved radiator hose line focuses on application-specific fitment for cooling system service.

Key Features

• EPDM rubber construction for coolant hose service
• Black finish
• Dual I.D. hose design
• End 1 inside diameter: 1 7/32 in.
• End 2 inside diameter: 1 5/16 in.
• End 1 outside diameter: 1 9/16 in.
• End 2 outside diameter: 1 11/16 in.
• SAE J20R4 Class D-1 and SAE J1684 Type EC specification reference
• Lower position fitment for Scion xD cooling system service

Detailed Description

Dayco 73023 is a curved radiator coolant hose engineered for the lower cooling circuit on 2008-2014 Scion xD models. The EPDM material is commonly used in coolant hose construction for resistance to heat and coolant exposure, while the curved profile supports the factory routing required in the engine bay. The dual I.D. hose configuration and listed end diameters help match the connection points used in this application. If you are servicing a Scion xD lower radiator hose, part number 73023 provides the specified hose shape and sizing for the job.

What This Hose Helps Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose connection points
• Softened or swollen hose material from age and heat
• Improper hose routing caused by a damaged curved hose
• Cooling system service on a 2008-2014 Scion xD

Installation Notes and Tips

Verify the lower hose routing and connection diameters before installation. Drain the cooling system as needed, inspect the mating necks and clamps, and confirm the hose seats fully without twisting. After installation, refill the system with the correct coolant and check for leaks at operating temperature. Confirm fitment by matching the vehicle application to 2008-2014 Scion xD lower radiator hose requirements for part number 73023.

Quality Assurance

Dayco manufactures this curved radiator hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications listed for this application. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.