Gates 21738 Radiator Coolant Hose

Gates 21738 Molded Coolant Hose Overview

The Gates 21738 molded coolant hose is an OEM-quality radiator coolant hose built from EPDM for dependable coolant routing in a wide range of vehicles. It is formed to match factory-style bends and dimensions, helping simplify replacement on applications such as Ford Taurus, Mazda Millenia, and Lexus LS600h inverter cooling systems.

Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant applications with a broad replacement range. This part number, 21738, is a molded hose with 16 mm inside diameter at both ends and a 6.6 in. centerline length for direct-fit service where the original hose follows a shaped routing path.

• EPDM construction for coolant-system durability
• Molded shape for factory-style hose routing
• 16 mm inside diameter at both ends
• 6.6 in. centerline length
• No spring, no quick-connect fittings, and no branch quantity
• Direct replacement for multiple radiator, heater, bypass, and oil cooler hose applications

Detailed Application Coverage

Compatible With 1984-2014 vehicle applications including Ford Taurus, Mazda 626, Mazda Millenia, Lexus SC400, Lexus LS600h, Suzuki XL-7, and other listed makes and models. Use this Gates 21738 hose where the factory routing calls for a molded coolant hose at positions such as heater to pipe, pipe to thermostat, pipe to water pump, engine to oil cooler pipe, and inverter cooling hose locations. This part cross-references Continental 63052 and AP Exhaust 8429 for the same application.

What This Hose Helps Address

• Cracked or hardened coolant hose material
• Coolant leaks at molded hose bends
• Restricted flow from collapsed or deteriorated hose sections
• Incorrect hose routing after a failed OE hose
• Replacement needs for heater, radiator, inverter, or oil cooler hose paths

Installation Notes and Tips

Verify end diameters, centerline length, and hose routing against the removed part before installation. This molded hose is used across multiple positions, including radiator and HVAC-related coolant paths, so confirm the exact vehicle application and connection points listed for your year, make, model, and engine configuration. Clean mating surfaces and inspect clamps, pipes, and adjacent coolant components before refilling the system.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use across a broad range of cooling-system applications. The Gates 21738 is part of the brand’s molded coolant hose line, which is built to cover many common factory hose shapes and sizes.