Gates 21490 Radiator Coolant Hose - Lower

Gates 21490 Molded Coolant Hose

The Gates 21490 molded coolant hose is built for lower radiator hose service on select GM compact cars from the 1980s and early 1990s. Made from EPDM rubber and formed to OEM-style dimensions, it supports a direct replacement for the original coolant routing on applications such as the Chevrolet Cavalier, Buick Skyhawk, and Cadillac Cimarron.

Key Features

• EPDM construction for coolant-system durability
• Molded hose shape for factory-style routing
• End 1 inside diameter: 1.25 in. (32 mm)
• End 2 inside diameter: 1.7 in. (43 mm)
• Centerline length: 13.8 in. (351 mm)
• No spring, no branch, and no quick-connect fittings
• Lower radiator coolant hose application

Product Details

Gates Molded Coolant Hose line is engineered for upper, lower, bypass, heater, and other coolant routing needs with OEM-quality specifications. Part number 21490 follows the molded profile needed for the listed lower hose applications, helping maintain proper hose alignment and coolant flow in vehicles that require a shaped replacement rather than a universal straight hose. This part cross-references Dayco 71159 for the same application.

Vehicle Fitment

• Fits 1989-1991 Chevrolet Cavalier, Lower; Molded Coolant Hose
• Fits 1989 Buick Skyhawk, Lower; Molded Coolant Hose
• Fits 1983-1988 Buick Skyhawk, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
• Fits 1983-1988 Chevrolet Cavalier, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
• Fits 1983-1988 Oldsmobile Firenza, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
• Fits 1983-1986 Cadillac Cimarron, Lower; Molded Coolant Hose
• Fits 1986 Pontiac Sunbird, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
• Fits 1984 Pontiac J2000 Sunbird, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
• Fits 1983 Pontiac J2000, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose

Common Replacement Reasons

• Cracked or hardened lower radiator hose
• Coolant seepage at the hose body or ends
• Collapsed hose from age or heat cycling
• Incorrect hose shape after prior repair
• Loss of proper coolant circulation through the lower hose path

Installation Notes and Quality Assurance

Verify hose routing, end diameters, and centerline length against the original part before installation. Inspect adjoining necks and clamps for wear, and confirm the hose is seated without twist or kinks. Gates molded coolant hoses are produced to OEM-quality specifications for replacement use in the listed applications.

Search terms: Gates 21490, Chevrolet Cavalier lower radiator hose, Buick Skyhawk coolant hose, Cadillac Cimarron molded hose.