Gates 18346 Molded Heater Hose

The Gates 18346 is a premium molded heater hose designed for HVAC and cooling system applications. This factory-molded, OE-style hose is engineered to fit today's smaller, tighter-fitting engine compartments with precision.

Key Features:

• Dual inside diameters: 5/8 inch (16mm) and 3/4 inch (18mm) for versatile connections
• Centerline length: 20-5/16 inches (516mm)
• EPDM rubber construction with synthetic fiber knit reinforcement and EPDM cover
• Engineered to resist electrochemical degradation (ECD) - the leading cause of hose failure
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R3 Type EC Class D-1 and D-2 specifications
• Approved for marine applications
• Compatible with coolant, water, and air applications

This molded heater hose delivers OE-quality performance with all the features of Gates premium coolant hose. The EPDM rubber construction provides excellent resistance to heat, weathering, and coolant degradation, ensuring long-lasting reliability. Gates recommends replacing hose clamps each time a new coolant hose is installed for optimal performance.

Important: Do not use for fuel or oil transfer applications.

Cross-Reference Part Numbers: ACDelco 16559M, Carquest 18346, GM 15926948, GM 25952801, NAPA 10346