Dayco 72391 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Ford Fusion

Dayco 72391 is a branched upper radiator coolant hose built from EPDM for reliable coolant routing in the engine bay. It is shaped for the upper hose location on select Ford Fusion, Mercury Milan, and Lincoln Zephyr applications, with a protective sleeve to help manage exposure in demanding underhood conditions.

Key Features

• EPDM construction for coolant system service
• Black finish with a curved, branched hose design
• Protective sleeve included for added abrasion resistance
• End sizes: 1 1/4 in., 1 1/2 in., and 9/32 in. inside diameter
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 72391 for direct identification

Detailed Description

Dayco Curved Radiator Hose 72391 is engineered as an upper radiator coolant hose for 2006-2009 Ford Fusion, 2006-2009 Mercury Milan, and 2006 Lincoln Zephyr applications. The branched hose layout and molded curvature support the factory-style coolant path, while the EPDM rubber construction is suited for hot coolant circulation and everyday engine bay temperatures. This hose also includes a protective sleeve, which adds an extra layer between the hose surface and nearby components.

For buyers searching for a 2006 Ford Fusion upper radiator hose, a 2007-2009 Mercury Milan coolant hose, or a 2006 Lincoln Zephyr radiator hose, Dayco 72391 provides a fitment-specific replacement option. This part cross-references Gates 23668 for the same application.

Common Cooling System Issues

• Cracked or split upper radiator hose
• Coolant seepage at the hose body or connection points
• Softening, swelling, or heat-related hose wear
• Restricted coolant flow from a deteriorated hose
• Replacement need after age-related rubber breakdown

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position fitment before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace damaged clamps as needed. Confirm that the protective sleeve is positioned away from sharp edges and hot components during routing.

Quality Assurance

Dayco manufactures cooling system hoses to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC, to support consistent material and dimensional standards for service replacement.