Gates 25656 Molded Radiator Coolant Hose

The Gates 25656 is a molded radiator coolant hose engineered to OEM-quality specifications for reliable cooling system performance. Manufactured using an EPDM tube and cover with synthetic fiber knit reinforcement, this hose is built to withstand the demanding thermal and chemical environment of modern engine cooling systems.

Gates molded coolant hoses are specifically designed to resist electrochemical degradation (ECD)—the leading cause of hose failure—by forming a protective barrier against the galvanic reactions that cause micro-cracking and internal breakdown over time.

Key Features:

• EPDM tube, synthetic fiber knit reinforcement, and heat- and ozone-resistant EPDM cover
• Engineered to resist electrochemical degradation (ECD), the leading cause of hose failure
• Pre-shaped molded design for precise OEM-style fit and a perfectly sealed connection
• Materials resist vacuum collapse, reducing the need for internal support springs
• Approved for marine applications
• Suitable for upper, lower, bypass, heater, and other coolant hose applications
• Meets SAE 20R4 and 20R3 Type EC Class D-1 and D-2 specifications
• Temperature Rating: -40°F to +275°F (-40°C to +135°C)
• Not for use in fuel or oil transfer applications

Gates recommends replacing hose clamps with Gates PowerGrip SB Clamps each time a new coolant hose is installed to ensure a leak-free seal and maximum service life.