Gates 21857 Radiator Coolant Hose - Lower

Gates 21857 Molded Coolant Hose Overview

The Gates 21857 molded coolant hose is a radiator coolant hose built to OE-style specifications for select Ford and Mercury applications. It is formed for lower hose routing and uses EPDM construction to handle everyday cooling-system demands.

Compatible with 1989-1995 Ford Thunderbird, lower; 1990 Ford Cougar, lower; and 1989-1990 Mercury Cougar, lower, this molded hose helps restore proper coolant flow in the factory routing path.

Key Features

• Brand: Gates Molded Coolant Hose line
• Part number: 21857
• Part type: radiator coolant hose
• EPDM rubber construction for cooling-system service
• Molded shape for lower hose routing
• End inside diameters: 1.5 in. (38 mm) and 1.75 in. (44 mm)
• Centerline length: 15.8 in. (401 mm)
• No spring and no quick-connect fittings

Product Details

Gates Molded Coolant Hose products are built for upper, lower, bypass, heater, and other coolant applications using OEM-quality specifications. The 21857 follows that approach with a molded profile that matches the intended routing on select Thunderbird and Cougar models, helping simplify radiator hose replacement and maintain a proper fit in the cooling circuit. If you are searching for a Ford Thunderbird lower radiator hose or a Mercury Cougar molded coolant hose, Gates 21857 is a direct-fit replacement option for the listed vehicles.

This part cross-references Continental 61573 and Raybestos Brakes 8547 for the same application.

Common Cooling System Issues It Can Address

• Cracked or aged lower radiator hose material
• Coolant leaks at the hose body or connection points
• Collapsed or misshaped hose routing
• Restricted coolant flow caused by a deteriorated hose
• Service replacement for a worn Ford Thunderbird or Cougar lower hose

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length before installation. Inspect adjoining necks, clamps, and coolant passages for wear or corrosion, and replace any damaged sealing surfaces before filling the system. After installation, refill with the correct coolant and bleed air from the system according to the vehicle service procedure.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed applications. The molded design and EPDM material support consistent replacement performance in the cooling system.