Gates 25265 Radiator Coolant Hose - Lower or Upper

Flexible OE-Style Coolant Hose Replacement

The Gates 25265 Flexible Coolant Hose is a radiator coolant hose built for direct-fit replacement where a formed hose is difficult to source. With a 1.25 in. (32 mm) inside diameter at both ends and a 35 in. (889 mm) centerline length, it is made to replicate a wide range of OE hose angles and routing paths for upper and lower cooling system applications.

For drivers and technicians servicing Chevrolet C1500, GMC K1500, Honda Prelude, or other listed applications, this Gates coolant hose offers a practical solution when the original hose route is complex or no longer available. The flexible construction helps simplify replacement on vehicles that need a custom-shaped cooling hose without relying on a molded OE part.

Key Features

• Part number: Gates 25265
• Flexible radiator coolant hose for cooling system service
• 1.25 in. / 32 mm inside diameter at both ends
• 35 in. / 889 mm centerline length
• EPDM and steel construction for durability
• Improved sealing surface for stronger leak resistance
• Non-molded design for routing in multiple directions

Product Details

Gates Flexible Coolant Hose (Standard) line is engineered for replacement jobs that call for a hose with broad routing flexibility rather than a fixed molded shape. The Gates Vulco-Flex II design follows the angles and planes of many OE coolant hoses, making it a useful option for upper radiator hose and lower radiator hose service across a wide range of vehicles. This part cross-references FF317 for the same application.

Compatible fitment includes 1999 Chevrolet C1500 upper radiator hose applications, 1996-1997 GMC K1500 upper radiator hose applications, and 1988-1996 Honda Prelude lower radiator hose applications. It also appears in fitment for Chevrolet Camaro, Pontiac Firebird, Toyota Corolla, and several GM full-size and G-body platforms. The part number 25265 is also listed with Gates 31618 and Gates 52035 in interchange data.

Common Problems This Hose Can Address

• Replacement of a deteriorated or leaking radiator coolant hose
• Service for hard-to-find OE hose shapes on older vehicles
• Cooling system repairs where a formed hose is no longer available
• Routing issues on upper or lower hose applications with unusual angles
• Leak concerns caused by worn sealing surfaces at the hose ends

Installation Notes and Tips

Verify end diameters, centerline length, and routing before installation. This hose is not molded, so it should be positioned to match the original cooling system path without kinks or sharp bends. Confirm vehicle-specific notes before ordering; some applications, including certain 1993-1994 Chevrolet P30 and GMC P3500 listings, are noted as not compatible with vehicles equipped with AC.

Use the vehicle fitment list to confirm the correct application for Chevrolet C1500, GMC K1500, Honda Accord, Honda Prelude, and other listed models. Proper clamp selection and a clean sealing surface are important for leak-free cooling system service.

Quality Assurance

Gates designs this flexible coolant hose for durable service in radiator and engine cooling systems, using EPDM and steel construction with an improved sealing surface to support leak resistance. The Gates 25265 is built as a standard replacement hose for a broad range of OE-style applications.