Gates 25257 Radiator Coolant Hose

Gates 25257 Flexible Coolant Hose

The Gates 25257 Vulco-Flex II radiator coolant hose is built for direct replacement where a flexible routing solution is needed. With a 1.25 in. inside diameter at both ends and a 23 in. centerline length, it is sized for a wide range of upper and lower coolant hose applications across import and domestic vehicles.

Gates Flexible Coolant Hose (Standard) construction uses EPDM with steel reinforcement for durability, while the flexible design helps replicate OE hose angles and bends without requiring a molded shape. The improved sealing surface is engineered for stronger leak resistance during coolant system service.

Key Features

• Part number 25257 from Gates Vulco-Flex II
• 1.25 in. inside diameter at both ends
• 23 in. centerline length for flexible routing
• EPDM and steel construction for coolant system use
• Non-molded design for broad OE-style replacement coverage
• Improved sealing surface for leak resistance

Detailed Description

This radiator coolant hose is designed for vehicles that need a flexible replacement hose rather than a pre-formed molded hose. It can bend in almost any direction, making it a practical choice for service work on applications such as Toyota Camry upper and lower hose positions, Mazda MX-6 upper hose applications, and Mitsubishi 3000GT upper hose service. The Gates 25257 also cross-references Gates 31615 for the same application.

By matching common OE hose dimensions and routing needs, this hose supports straightforward replacement on a broad range of vehicles, including Toyota Corolla lower hose applications, Volvo 960 upper hose applications, and Ford Mustang upper hose applications. The flexible design helps reduce the need to source expensive molded OE-style hoses when the original routing can be duplicated with a standard flexible hose.

What It Helps Address

• Cracked or aged radiator coolant hose material
• Coolant leaks at worn hose sealing surfaces
• Replacement needs where a molded hose is no longer practical
• Routing challenges on upper or lower coolant hose runs
• Service on vehicles with discontinued or costly OE hose shapes

Installation Notes and Tips

Verify inside diameter, centerline length, and hose routing before installation. This hose is listed for multiple positions, including upper, lower, and engine-to-pipe or pipe-to-radiator applications, so confirm the exact vehicle position and any notes such as A/C or one-piece hose requirements. For fitment examples, it fits 1992-1997 Toyota Camry, lower; 1995-1997 Mazda MX-6, upper; and 1991-1999 Mitsubishi 3000GT, upper.

Inspect the coolant necks, clamps, and adjoining pipes before installing the new hose. Proper alignment and clean sealing surfaces help the hose seat correctly and support leak-free operation.

Quality Assurance

Gates Vulco-Flex II hoses are engineered as OE-style replacement parts for coolant system service, with flexible EPDM and steel construction and an improved sealing surface for dependable fit and sealing performance.