Gates 65003 Molded Coolant Hose OEM Replacement Radiator Hose

The Gates 65003 Molded Coolant Hose is a precision-engineered, factory-molded radiator and coolant hose designed to deliver OEM-quality fit and long-lasting performance. Pre-shaped to match exact manufacturer specifications, this replacement coolant hose installs quickly and seals reliably without modification.

Gates engineers this hose with a proprietary EPDM compound specifically formulated to combat electrochemical degradation (ECD) — the leading cause of coolant hose failure. ECD occurs when the hose, liquid coolant, and metal fittings form a galvanic cell, creating a chemical reaction that produces micro-cracks in the hose tube. Left unchecked, this leads to coolant leaks and costly engine damage.

Key Features:

• Factory-molded construction for precise OEM-fit installation
• EPDM tube with synthetic fiber knit reinforcement and heat- and ozone-resistant EPDM cover
• Engineered to resist electrochemical degradation (ECD) — the leading cause of hose failure
• Specifically engineered materials resist vacuum collapse, reducing the need for internal support springs
• Resistant to heat, ozone, and chemical coolants
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R4 EC Class D1 requirements
• 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 proper, leak-free seal. Trust Gates — a global leader in fluid power and engine components with over a century of engineering experience.