Gates 21261 Radiator Coolant Hose - Upper

Gates 21261 Molded Coolant Hose Overview

The Gates 21261 molded coolant hose is an OE-style radiator coolant hose built from EPDM for dependable coolant transfer in upper hose applications. It is shaped to match the routing needed on select Mitsubishi Diamante, Isuzu Impulse, and Isuzu Trooper models, helping simplify radiator hose replacement.

Gates Molded Coolant Hose products are built for upper, lower, bypass, heater, and other coolant system locations, with OEM-quality specifications for direct-fit service. The molded design supports proper hose routing in tight engine bays, and the Gates 21261 part number is a direct reference for the listed applications.

Key Features

• EPDM construction for coolant system service
• Molded hose profile for accurate routing
• 1.19 in. / 30 mm inside diameter at both ends
• 16.1 in. / 409 mm centerline length
• No spring and no quick-connect fittings
• Upper position application
• Cross-reference: Dayco 70949

Detailed Product Description

This Gates radiator coolant hose is engineered for the upper coolant path on 1992-1996 Mitsubishi Diamante, 1983-1987 Isuzu Impulse, and 1984-1985 Isuzu Trooper applications. The molded shape helps maintain the correct hose path between connection points, while the EPDM material is suited for standard cooling-system temperatures and coolant exposure. If you are replacing a worn upper radiator hose on a Mitsubishi Diamante or Isuzu cooling system, Gates 21261 provides a direct replacement reference for the listed vehicles.

The Gates molded coolant hose line covers multiple coolant system locations, including radiator and heater hose applications, and this part follows that OE-style approach for the specified upper hose fitments. The Gates 21261 part number is also commonly searched alongside the vehicle names and model years listed here.

Vehicle Fitment

• Fits 1993-1996 Mitsubishi Diamante, upper. Radiator and HVAC compatible coolant and heater hose; molded coolant hose.
• Fits 1992 Mitsubishi Diamante, upper.
• Fits 1983-1987 Isuzu Impulse, upper. Radiator and HVAC compatible coolant and heater hose; molded coolant hose.
• Fits 1984-1985 Isuzu Trooper, upper.

Common Replacement Reasons

• Cracked or hardened upper radiator hose
• Coolant seepage at the hose body or ends
• Collapsed hose shape from age or heat cycling
• Poor routing or fitment with a previous replacement hose
• Need for a direct-fit hose for Mitsubishi Diamante or Isuzu cooling service

Installation Notes

Inspect the hose necks, clamps, and mating surfaces before installation. Drain coolant to a safe level, compare the molded shape and end diameters to the original hose, and verify routing clears belts, pulleys, and nearby components. After installation, refill the cooling system and check for leaks at operating temperature.

Quality Assurance

Gates manufactures molded coolant hoses to OEM-quality specifications for replacement cooling-system service. Part number 21261 is built as a molded EPDM hose for the listed upper hose applications.