Gates 25677 Molded Coolant Hose - OE-Quality Radiator Replacement Hose

The Gates 25677 is a precision-molded coolant hose engineered to OEM specifications for a direct-fit replacement in your vehicle's cooling system. Constructed with an EPDM tube, synthetic fiber knit reinforcement, and a heat- and ozone-resistant EPDM cover, this hose delivers long-lasting, reliable performance under demanding under-hood conditions.

Gates molded coolant hoses are specifically engineered to resist Electrochemical Degradation (ECD) — the leading cause of coolant hose failure. ECD occurs when the hose, liquid coolant, and metal fittings form a galvanic reaction that causes micro-cracks in the hose tube, eventually leading to coolant leaks and engine overheating. Gates' advanced EPDM compound is formulated to stop this process before it starts.

Key Features:

• EPDM tube, synthetic fiber knit reinforcement, and EPDM cover construction
• Engineered to resist electrochemical degradation (ECD) — the #1 cause of hose failure
• Specifically engineered materials resist vacuum collapse
• Heat and ozone resistant cover for extended service life
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R4 EC Class D1 standards
• Pre-shaped for a direct OEM-quality fit — no cutting or modification needed
• Approved for marine applications
• Not intended for fuel or oil transfer applications

Gates recommends replacing hose clamps each time a new coolant hose is installed to ensure a secure, leak-free seal. As one of the world's leading automotive parts manufacturers, Gates works directly with OEM vehicle programs to bring aftermarket-ready solutions that meet or exceed original equipment standards.