Dayco 71771 Radiator Coolant Hose - Upper

Product Overview

Dayco 71771 is a curved radiator coolant hose built for upper cooling system routing. It uses EPDM construction and a single I.D. hose design with matching 1 7/16-inch inside diameters at both ends for a direct replacement style fit.

Fits 1995-1997 Ford Crown Victoria, upper. Fits 1995-1997 Lincoln Town Car, upper. Fits 1995-1997 Mercury Grand Marquis, upper.

Key Features

• EPDM rubber construction for coolant service.
• Curved hose profile for upper radiator routing.
• Single I.D. hose design with 1 7/16-inch ends.
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.
• Black finish for a clean OE-style appearance.

Detailed Description

This Dayco radiator coolant hose is engineered for upper cooling system connections on the Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis. Part number 71771 matches the listed fitment and uses EPDM material to handle coolant exposure in a standard radiator hose application. The curved shape helps follow the original hose path, while the equal-diameter ends support a consistent connection at both ends. If you are replacing a worn or cracked upper hose on these vehicles, 71771 provides a fitment-specific solution. This part cross-references Ford (e.g., F5AE-8B274-AC, F5AZ-8260-A) for the same application.

What It Is Used For

• Replacing a cracked or deteriorated upper radiator hose.
• Restoring coolant flow between engine and radiator connections.
• Addressing leaks caused by hardened or swollen hose material.
• Correcting hose routing issues on the original cooling layout.

Installation Notes and Tips

Verify the hose path, end diameters, and upper position before installation. Inspect adjoining necks and clamps for wear, corrosion, or deformation before transferring the new hose. Confirm the vehicle application by year, make, model, and position to match the listed fitment for the Ford Crown Victoria, Lincoln Town Car, or Mercury Grand Marquis.

Quality Assurance

Dayco manufactures cooling system hoses to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC for this part.