Gates 21558 Radiator Coolant Hose - Upper

Gates 21558 Molded Coolant Hose Overview

The Gates 21558 molded coolant hose is an OE-style radiator coolant hose built for upper cooling-system routing on select Jeep, Buick, Chevrolet, Oldsmobile, and Pontiac applications. Made from EPDM, it follows molded dimensions for a direct replacement on listed vehicles and helps restore proper coolant flow through the radiator and heater circuit.

Gates Molded Coolant Hose products are part of a broad replacement line covering upper, lower, bypass, heater, and other coolant hose applications. This line is built to match OEM-quality specifications, giving technicians and DIY buyers a direct-fit option for radiator hose replacement without sourcing the original dealer part.

Key Features

• EPDM construction for coolant-system durability
• Molded hose shape for routed OE-style fitment
• 1.25 in. inside diameter at End 1 and 1.5 in. inside diameter at End 2
• 22.9 in. centerline length
• No spring, no modular sections, and no quick-connect fittings
• Direct replacement for upper radiator coolant hose applications listed below

Fitment Details

• Fits 2000 Jeep Cherokee, upper; radiator and HVAC compatible coolant and heater hose.
• Fits 1997-1999 Jeep Cherokee, upper; cut-to-fit for vehicles without air conditioning.
• Fits 1983-1986 Buick Century, upper; without air conditioning, with standard cooling.
• Fits 1982-1986 Chevrolet Celebrity, upper; without air conditioning, with standard cooling.
• Fits 1982-1986 Oldsmobile Cutlass Ciera, upper; without air conditioning, with standard cooling.
• Fits 1986 Pontiac 6000, upper; with standard cooling.
• Fits 1982-1985 Pontiac 6000, upper; without air conditioning, with standard cooling.
• Fits 1982 Buick Century, upper; without air conditioning, with standard cooling.

What This Hose Helps Address

• Cracked or hardened upper radiator hose material
• Coolant leaks at the hose body from age or heat cycling
• Restricted coolant flow caused by a deteriorated hose
• Incorrect hose routing after a failed replacement
• Fitment issues on vehicles requiring a molded upper coolant hose

Installation Notes

Verify the hose shape, end diameters, and centerline length against the removed part before installation. On 1997-1999 Jeep Cherokee applications, confirm whether the vehicle is without air conditioning and whether a cut-to-fit configuration is required. Inspect clamps, necks, and adjoining cooling-system components for wear before installing the new hose.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for listed radiator and heater hose applications. Part number 21558 is engineered as a direct replacement within the Gates Molded Coolant Hose line and cross-references BBB Industries 8273 for the same application.