Gates 20618 Radiator Coolant Hose

Gates 20618 Molded Coolant Hose

Gates 20618 is a molded radiator coolant hose built to OEM-quality specifications for coolant and heater system service. With EPDM construction and 19 mm (3/4 in.) inside diameters at both ends, it is made for direct replacement in a wide range of radiator and HVAC hose applications.

The Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other formed hose routes, helping reduce the time spent sourcing a dealer-only replacement. This part number is used across applications such as Chevrolet Cavalier, Pontiac Sunfire, and Ford Mustang cooling system repairs.

Key Features

• EPDM rubber construction for coolant-system durability
• Molded shape for formed hose routing
• 19 mm (0.75 in.) inside diameter at both ends
• 124 mm (4.9 in.) centerline length
• No spring, no modular sections, and no quick-connect fittings
• Direct-fit style replacement for radiator and heater hose service

Product Details

Gates Molded Coolant Hose 20618 is engineered for vehicles that use a formed hose between the engine, thermostat, pipe, tee, water pump, or heater circuit. The molded profile helps match the original hose path, while the EPDM material is selected for use in hot coolant environments. This hose is listed for a broad range of vehicles, including 2000-2002 Chevrolet Cavalier, 2000-2002 Pontiac Sunfire, 1995-1998 Ford Windstar, and 2006-2009 Saab 9-3.

This part cross-references Four Seasons 20618 for the same application.

Common Repair Uses

• Replacing a leaking or cracked radiator coolant hose
• Restoring coolant flow between the thermostat and pipe
• Repairing heater hose routing in HVAC-equipped systems
• Addressing soft, swollen, or heat-aged EPDM hose sections
• Correcting coolant loss from a molded hose connection point

Installation Notes

Verify hose routing, end diameters, and centerline length before installation. Compare the original hose shape to the molded profile to confirm the correct engine-to-tee, thermostat-to-pipe, or heater-to-pipe application. Inspect adjoining pipes, clamps, and sealing surfaces for wear before installing the new hose. For best results, flush the cooling system if contamination or degraded coolant is present.

Quality Assurance

Gates manufactures molded coolant hoses to OEM-quality specifications and offers one of the broadest molded hose replacement lines in the aftermarket. Part number 20618 is built for direct replacement service in confirmed applications across multiple makes and models.