Gates 51398 HVAC Heater Hose Molded Coolant Hose

The Gates 51398 is a premium molded HVAC heater hose designed to deliver reliable coolant flow from the engine to the heater core for consistent cabin heating performance. This pre-shaped, curved hose is engineered with OEM-quality specifications to ensure proper fit and sealed connections in demanding automotive applications.

Construction and Materials:

• EPDM (ethylene propylene diene monomer) tube construction for superior heat and chemical resistance
• Synthetic fiber knit reinforcement for structural integrity
• Heat- and ozone-resistant EPDM cover for long-lasting durability
• Integrated components include female quick connector for easy installation
• Engineered to resist electrochemical degradation, the leading cause of coolant hose failure

Specifications:

• Centerline Length: 16.5 inches
• End 1 Inside Diameter: 0.75 inches (19mm)
• End 2 Inside Diameter: 0.85 inches (22mm)
• Includes 1 quick connect fitting
• Meets SAE 20R4 EC Class D1 requirements
• Temperature range: -40°F to +275°F (-40°C to +135°C)

This modular coolant hose features pre-shaped geometry to eliminate installation guesswork and prevent kinking or collapse under vacuum conditions. The Gates 51398 replaces OEM part numbers 20893310, 1818631, and others, providing a cost-effective alternative to dealership parts without compromising quality or performance.