Dayco 71840 Radiator Coolant Hose - Upper

Curved Upper Radiator Hose for Ford and Mercury

Restore coolant flow with the Dayco Curved Radiator Hose, Part Number 71840. This upper radiator coolant hose is built from EPDM rubber and shaped for the curved routing used on select Ford Taurus and Mercury Sable applications.

Key Features

• EPDM construction for coolant-system durability
• Black finish for a clean OE-style appearance
• 1 1/2 in. inside diameter at both ends
• Single I.D. hose design for upper radiator routing
• Protective sleeve included for added abrasion resistance
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

Dayco Curved Radiator Hose 71840 is a radiator coolant hose made for upper hose applications where a formed, curved shape is required. The EPDM rubber construction is suited for cooling-system service, while the protective sleeve adds an extra layer where the hose may contact nearby components. This part cross-references Ford applications such as F6DE-8B274-DB and F6DZ-8260-A for the same application.

Compatible With 1996-2007 Ford Taurus, upper, and 1996-2005 Mercury Sable, upper. If you are replacing a worn upper radiator hose on a Ford Taurus or Mercury Sable, Part Number 71840 provides the correct curved profile for these vehicles.

What It Helps Fix

• Coolant leaks from cracked or aged upper radiator hose rubber
• Softening, swelling, or collapse in the cooling hose
• Improper hose routing caused by a damaged formed hose
• Heat-related wear where the hose contacts nearby engine components
• Loss of cooling-system integrity from a deteriorated radiator hose

Installation Notes and Tips

Verify end diameters, routing, and upper-hose orientation before installation. Inspect hose clamps, radiator necks, and thermostat housing connections for corrosion or damage before fitting the new hose. Confirm the hose follows the original curved path on the Ford Taurus or Mercury Sable to avoid kinks, rubbing, or tension at the connections.

Quality Assurance

This Dayco radiator coolant hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system service. It is built as a direct replacement for the listed upper hose applications, including Ford Taurus and Mercury Sable fitments.