Gates 22518 Radiator Coolant Hose - Water Outlet Housing To Thermostat

Gates 22518 Molded Coolant Hose Overview

The Gates 22518 molded coolant hose is built for radiator cooling system service on select Nissan and INFINITI applications. It follows OEM-quality specifications and is shaped for the water outlet housing to thermostat route where a formed hose is required.

Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant applications with application-specific fitment. This hose uses EPDM construction for coolant-system durability and a molded profile that matches the original routing.

Key Features

• EPDM rubber construction for coolant hose service
• Molded design for proper routing in the cooling system
• 1.08 in. / 27 mm inside diameter at both ends
• 4.5 in. / 114 mm centerline length
• No spring, no modular sections, and no quick-connect fittings
• Direct replacement style for select Nissan Frontier, Nissan Xterra, Nissan Pathfinder, and INFINITI QX4 applications

Detailed Description

Gates part number 22518 is a molded radiator coolant hose engineered for the water outlet housing to thermostat connection on 1999-2004 Nissan Frontier, 2000-2004 Nissan Xterra, 1997-2000 INFINITI QX4, and 1996-2000 Nissan Pathfinder. The formed shape helps maintain the original hose path and connection geometry, which is important in tight engine compartments where straight hose stock will not match the factory layout. If you are replacing a worn Nissan Frontier coolant hose or servicing a Nissan Pathfinder cooling system, this formed hose provides the correct molded profile for the listed applications. Part number 22518 is also cross-referenced to Continental 66683 for the same application.

What This Hose Helps Address

• Coolant leaks at a cracked or aged hose body
• Softening, swelling, or collapse from heat and coolant exposure
• Improper routing caused by a damaged formed hose
• Cooling system service on a Nissan Frontier, Nissan Xterra, Nissan Pathfinder, or INFINITI QX4
• Replacement of a hose between the water outlet housing and thermostat

Installation Notes and Tips

Verify the hose route, end diameters, and centerline length against the original part before installation. Inspect the mating necks, clamps, thermostat housing, and water outlet housing for corrosion or damage, and replace any worn sealing surfaces before installing the new hose. Confirm the hose is seated fully and routed without twist or contact with hot or moving components.

Quality Assurance

Gates molded coolant hoses are manufactured to OEM-quality specifications for the listed cooling-system applications. The Gates 22518 is part of the brand’s molded coolant hose line, which is built to cover a wide range of replacement hose needs with application-specific fitment.