Gates 18513 Molded Heater Hose OEM-Style EPDM Coolant Hose

The Gates 18513 Molded Heater Hose is a premium, factory-molded OEM-style heater hose engineered to deliver reliable coolant flow in today's tighter, more demanding engine compartments. Built by Gates — a global leader in fluid power and power transmission products — this hose is designed as a direct-fit replacement that matches original equipment routing and dimensions.

Constructed with an EPDM (Ethylene Propylene Diene Monomer) tube and cover with synthetic fiber reinforcement, the Gates 18513 is specifically engineered to resist electrochemical degradation (ECD) — the leading cause of heater hose failure. ECD occurs when hose materials, coolant fluid, and metal fittings interact to form a galvanic reaction, causing micro-cracks that lead to coolant leaks and eventual hose failure.

Key Features:

• EPDM construction — tube, reinforcement, and cover for maximum durability and heat resistance
• Electrochemical degradation (ECD) resistance — engineered to prevent the leading cause of hose failure
• Resists water permeation — maintains hose integrity over extended service life
• Factory-molded OEM-style shape — designed for precise, leak-free fit in original routing paths
• Wide temperature range — rated from -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R3 EC Class D-1/D-2 specifications — industry-standard compliance for heater hose applications
• Compatible with coolant and water applications — not for use with fuel or oil

Gates molded heater hoses are unaffected by most coolants and non-oil-based coolant additives, keeping your engine's heating system operating at peak efficiency. This is a drop-in replacement hose built to OEM specifications, making installation straightforward and reliable. Gates recommends replacing hose clamps each time a new coolant hose is installed.

Note: Not for use in fuel or oil transfer applications.