Gates 21189 Radiator Coolant Hose - Lower or Upper

Gates 21189 Molded Coolant Hose Overview

Gates 21189 is a molded radiator coolant hose built to OEM-quality specifications for upper coolant routing. Made from EPDM, it is shaped for a precise fit on select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications where a formed upper hose is required.

Compatible With 1980-1990 Chevrolet C1500, C2500, K1500, K2500 upper radiator hose applications, plus select Buick Regal, Pontiac Grand Prix, and Oldsmobile Cutlass models. This Gates molded coolant hose helps restore proper coolant flow in vehicles that need a formed replacement rather than a universal hose.

Key Features

• Gates Molded Coolant Hose line
• Part number 21189
• EPDM construction for coolant-system service
• Molded shape for upper hose routing
• 1.25 in. inside diameter at both ends
• 32.3 in. centerline length
• No spring and no quick-connect fittings
• Direct replacement style for radiator coolant hose service

Product Details

The Gates Molded Coolant Hose line is built for upper, lower, bypass, heater, and other coolant-system applications, with this part configured as an upper radiator coolant hose. Gates 21189 is engineered to match the formed routing used on many GM rear-wheel-drive cars and trucks, including Chevrolet Caprice, Monte Carlo, Impala, El Camino, and GMC C1500/C2500/K1500/K2500 applications. If you are replacing a worn upper radiator hose on a Buick Regal or Pontiac Grand Prix, this molded hose provides the correct shape and dimensions for the listed vehicles.

This part cross-references Dayco 71025 and Continental 61087 for the same application.

Common Problems This Hose Can Address

• Cracked or softened upper radiator hose material
• Coolant leaks at the hose body or ends
• Collapsed or misshaped hose routing
• Restricted coolant flow from a deteriorated hose
• Replacement needs on aging Chevrolet, GMC, Buick, Oldsmobile, and Pontiac cooling systems

Installation Notes and Tips

Verify end diameters, centerline length, and molded routing against the removed hose before installation. Confirm the hose is being used in the upper radiator position and inspect adjoining clamps, necks, and coolant passages for wear or corrosion. Drain coolant as needed, transfer the hose carefully to preserve the molded shape, and refill the system according to the vehicle service procedure.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for fit and service in the listed applications. The molded hose design is part of Gates’ broad replacement line for coolant-system service.