Gates 25249 Radiator Coolant Hose

Flexible coolant hose for OE-style replacement

The Gates 25249 Flexible Coolant Hose (Standard) is a radiator coolant hose built for applications that need a bendable, direct-fit style replacement. With a flexible steel-reinforced EPDM construction and an improved sealing surface, it is designed to replace expensive OE coolant hose routing with a simpler, more cost-effective solution.

Compatible With 1950-1987 Chevrolet Bel Air, Toyota Corona, Toyota 510, Mercury Capri, and Isuzu Impulse applications, this hose is sized with a 1.25 in. inside diameter at both ends and a 7.5 in. centerline length. The Gates Vulco-Flex II design helps replicate complex hose angles and planes without requiring a molded hose shape.

Key features

• Part number: Gates 25249
• Flexible radiator coolant hose for upper and lower cooling system routing
• EPDM and steel construction for durability and shape retention
• 1.25 in. inside diameter at both ends
• 7.5 in. centerline length
• Non-molded design for routing in multiple directions
• Improved sealing surface for greater leak resistance
• OE-style replacement for applications that use formed coolant hose geometry

Product details

Gates Flexible Coolant Hose (Standard) 25249 is part of the Vulco-Flex II line, which is engineered for cooling system repairs where a rigid molded hose is not the only option. The flexible construction allows the hose to follow the required path in the engine bay while maintaining a secure seal at the connection points. This makes it a practical choice for radiator hose replacement on older vehicles such as the Chevrolet Bel Air, Toyota Corona, and Nissan 510, as well as select Mercury Capri and Isuzu Impulse applications.

This part cross-references Dayco 81011 and Dorman - HELP 67901 for the same application.

Common repair applications

• Replacing a cracked or leaking radiator coolant hose
• Restoring coolant flow after hose collapse or softening
• Repairing a hose route that requires a flexible bend instead of a molded shape
• Addressing coolant seepage at the sealing surface
• Servicing upper or lower cooling system hose connections on listed vehicles

Installation notes and tips

Verify the hose inside diameter, routing path, and centerline length before installation. This hose is not molded, so it should be positioned to match the original cooling system angle and secured with the correct clamps for the application. Inspect the mating tubes and pipe ends for corrosion, pitting, or deformation before fitting the hose to help maintain a proper seal.

Fits 1950-1954 Chevrolet Bel Air, Upper; fits 1967-1973 Nissan 510, Upper; fits 1967-1973 Toyota Corona, Upper; fits 1972-1973 Mercury Capri, Lower; fits 1985-1987 Isuzu Impulse, Lower - Engine To Pipe.

Quality assurance

Gates designs the Vulco-Flex II coolant hose line for durable service in demanding cooling system applications. The EPDM and steel construction, along with the improved sealing surface, supports reliable fitment and leak resistance in OE-style radiator hose replacement work.