Gates 21868 Radiator Coolant Hose - Upper

Upper Radiator Coolant Hose for GM V8 Applications

Gates 21868 is a molded upper radiator coolant hose built to OEM-quality specifications for select Buick, Chevrolet, and Oldsmobile applications. It is formed for direct replacement use on the upper coolant circuit, helping restore proper coolant routing on 1991-1993 Buick Roadmaster, 1991-1993 Chevrolet Caprice, 1991-1993 Chevrolet Commercial Chassis, and 1991-1992 Oldsmobile Custom Cruiser models.

Key Features

• Molded EPDM construction for coolant-system service
• Upper hose application with OEM-style formed routing
• End 1 inside diameter: 1.27 in. (32 mm)
• End 2 inside diameter: 1.27 in. (32 mm)
• Centerline length: 30.2 in. (767 mm)
• No spring and no quick-connect fittings
• Direct replacement part number: Gates 21868

Product Line Details

Gates Molded Coolant Hose products are built for upper, lower, bypass, heater, and other coolant hose locations. This line focuses on formed replacement hoses that match OEM-style dimensions and routing, reducing the need to source a hose from the dealer for radiator hose replacement. Gates 21868 is part of that molded hose family and is shaped for the upper radiator hose position.

Detailed Description

Gates 21868 uses EPDM material for coolant-system durability and a molded profile that follows the factory hose path. With matching 1.27-inch (32 mm) inside diameters at both ends and a 30.2-inch centerline length, this hose is specified for the upper radiator connection on the listed Buick Roadmaster, Chevrolet Caprice, Chevrolet Commercial Chassis, and Oldsmobile Custom Cruiser applications. If you are searching for an upper radiator coolant hose for 1991-1993 Buick Roadmaster or a molded coolant hose for 1991-1993 Chevrolet Caprice, this part number provides the correct formed replacement format.

What It Helps Address

• Cracked or aged upper radiator hose material
• Coolant leaks at the upper hose connection
• Incorrect hose routing from a previous replacement
• Heat-related hose softening or collapse in service
• Fitment issues when replacing the factory upper coolant hose

Installation Notes and Tips

Verify the hose shape, end diameters, and centerline length against the removed part before installation. Inspect the radiator neck, engine outlet, and clamps for wear or corrosion, and replace damaged sealing surfaces before installing the new hose. Confirm the hose is routed without twist or contact with moving or hot components. This part cross-references Continental 61632 and Dayco 71520 for the same application.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The formed design and application-specific dimensions support accurate fitment on the listed vehicles, including Buick Roadmaster, Chevrolet Caprice, Chevrolet Commercial Chassis, and Oldsmobile Custom Cruiser models.