Gates 21057 Radiator Coolant Hose - Upper

Gates 21057 Molded Coolant Hose Overview

The Gates 21057 molded coolant hose is an OE-quality radiator coolant hose built for upper coolant routing on select Chevrolet, Geo, Pontiac, Subaru, and Suzuki applications. Made from EPDM, it is shaped to match the original hose path for a cleaner fit and easier replacement on vehicles such as the Chevrolet Metro, Pontiac Firefly, and Suzuki Swift.

Gates Molded Coolant Hose products are built for radiator, heater, bypass, and other coolant system applications where a formed hose is needed to follow factory routing. This line is engineered to reduce the time and effort of sourcing a dealer-only replacement while maintaining the dimensions needed for proper coolant flow.

Key Features

• Part number: 21057
• Brand: Gates Molded Coolant Hose
• Material: EPDM
• Molded hose construction for factory-style routing
• Upper hose position
• Centerline length: 18.1 in. (460 mm)
• End inside diameter: 1 in. (25 mm) on both ends
• No spring and no quick-connect fittings
• Direct replacement style for select radiator and HVAC coolant applications

Detailed Description

Gates 21057 is a molded radiator coolant hose for upper-position applications that require a formed EPDM hose with matching end diameters and centerline length. It is listed for 1998-2000 Chevrolet Metro, 1994-2000 Pontiac Firefly, 1995-1998 Suzuki Swift, 1993-1997 Geo Metro, 1989-1992 Chevrolet Sprint, 1989-1992 Geo Metro, 1992 Suzuki Swift, 1989-1991 Pontiac Firefly, 1977-1979 Subaru Standard, and 1976 Subaru Standard with California emission system. This part cross-references Dayco 70894 for the same application.

For buyers searching for a 1998 Chevrolet Metro upper radiator hose, a 1994 Pontiac Firefly coolant hose, or a 1995 Suzuki Swift molded hose, this part number provides a formed replacement that follows the original hose path and supports proper coolant system routing.

Common Problems This Hose Can Address

• Cracked or split upper radiator hose
• Coolant leaks at the hose body
• Collapsed or softened hose material from age and heat
• Poor hose routing after a previous repair
• Difficulty sourcing an OE-style molded replacement

Installation Notes and Tips

• Verify the vehicle year, make, model, and upper hose position before ordering.
• Compare the hose shape and end diameters to the original part before installation.
• Inspect hose clamps, thermostat housing, radiator necks, and nearby coolant components for wear or corrosion.
• Drain coolant as needed before removing the old hose and refill the system after installation.
• Check for leaks and confirm proper coolant circulation after the engine reaches operating temperature.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for fit and function in the listed applications. The EPDM construction and molded profile are intended to match factory-style coolant hose requirements for select Chevrolet Metro, Geo Metro, Pontiac Firefly, Subaru Standard, and Suzuki Swift vehicles.