Gates 18616 Premium Molded Heater Hose 3/4" x 13-5/16"

The Gates 18616 is a premium molded heater hose measuring 3/4" inside diameter x 13-5/16" centerline length, engineered as a direct OEM-style replacement for automotive and light-truck heating and cooling systems. Factory-molded to a precise shape, this hose is designed to fit today's tighter engine compartments with no cutting or bending required.

Key Features:

• EPDM Construction: Inner tube and outer cover are both EPDM (Ethylene Propylene Diene Monomer) rubber for superior resistance to heat, ozone, and weathering
• Synthetic Fiber Reinforcement: Knit fiber reinforcement layer provides structural integrity under pressure and temperature cycling
• Electrochemical Degradation Resistance: Engineered compound resists ECD — the leading cause of heater hose failure — for extended service life
• Low Water Permeation: Reduces coolant loss through the hose wall, helping maintain proper coolant levels
• Wide Temperature Range: Rated from -40°F to +275°F (-40°C to +135°C)
• SAE Compliant: Meets SAE 20R3 EC Class D-1 specifications
• Marine Approved: Suitable for marine cooling and heating applications
• OEM-Style Fit: Factory-molded shape ensures proper routing and a leak-free connection

Compatible with coolant, water, and air transfer applications. Not intended for fuel or oil transfer. Gates has been a trusted name in hose and belt technology for over a century, supplying OEM and aftermarket customers worldwide with industry-leading fluid power products.