Gates 25686 Molded Coolant Hose

The Gates 25686 is a factory-molded replacement coolant hose engineered to deliver OEM-quality performance in radiator, heater, bypass, and other cooling system applications. Precision-molded to match original equipment specifications, this hose installs with confidence and ensures a leak-free, properly sealed connection every time.

Constructed with an EPDM tube, synthetic fiber knit reinforcement, and a heat- and ozone-resistant EPDM cover, the Gates 25686 is built to withstand the demands of modern cooling systems. The compound is specifically engineered to resist electrochemical degradation (ECD) — the leading cause of coolant hose failure — which occurs when the hose, coolant fluid, and metal fittings interact to form a galvanic cell that degrades the hose from the inside out.

Key Features:

• Factory-molded for a precise OEM-fit and perfectly sealed conditions
• EPDM construction resists heat, ozone, and chemical coolants
• Engineered to resist electrochemical degradation (ECD), the leading cause of hose failure
• Reinforced materials resist vacuum collapse, reducing the need for internal springs
• Meets SAE 20R4 EC Class D1 requirements
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Approved for marine applications

Gates recommends replacing hose clamps each time a new coolant hose is installed to ensure a reliable, long-lasting seal. Do not use for fuel or oil transfer applications.