Dayco 72239 Radiator Coolant Hose - Lower

Dayco 72239 Curved Radiator Hose

The Dayco 72239 curved radiator hose is a direct-fit coolant hose built for the lower cooling circuit on select Dodge Ram 1500 trucks. Made from EPDM rubber with a black finish, it is shaped to match the routing needed for reliable coolant transfer in the engine bay.

Compatible with 2004-2008 Dodge Ram 1500 lower radiator hose applications, this hose is built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications. The 1 3/4-inch inside diameter at both ends and curved trunk height help support a proper fit in the factory hose path.

Key Features

• Dayco Curved Radiator Hose, part number 72239
• EPDM construction for cooling-system use
• Black finish for a factory-style appearance
• 1 3/4-inch inside diameter at both ends
• Single I.D. hose design for lower radiator routing
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Compatible with 2004, 2005, 2006, 2007, and 2008 Dodge Ram 1500 lower hose applications

Product Details

Dayco’s Curved Radiator Hose line focuses on molded coolant hoses that follow the vehicle’s original routing geometry. For the Dodge Ram 1500, the curved shape and 19-1/2-inch trunk height help the hose align with the lower radiator connection while maintaining consistent coolant flow. The Dayco 72239 is a practical OE-style replacement for trucks that need a lower radiator hose with the correct bend and end sizing.

This part cross-references ACDelco 22445M and Gates 22693 for the same application.

Common Problems This Hose Can Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose connection points
• Softening, swelling, or heat-related hose deterioration
• Poor fit from an incorrect straight hose replacement
• Restricted coolant transfer caused by a damaged hose

Installation Notes and Tips

Before installation, compare the hose shape, end diameters, and routing to the removed part to confirm the correct lower hose application. Inspect the radiator neck and engine-side connection for corrosion, residue, or sharp edges that could affect sealing. Replace coolant as needed and verify clamp condition during service. This hose does not include a heat shield or protective sleeve.

Quality Assurance

Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, the Dayco 72239 is engineered for cooling-system service on the specified Dodge Ram 1500 applications. Its EPDM construction supports dependable use in engine-bay temperatures and coolant exposure.