Gates 51381 Lower Molded Coolant Hose

The Gates 51381 is a precision-molded lower coolant hose engineered to OEM-quality specifications for demanding cooling system applications. This factory-molded hose is pre-shaped to ensure a perfect fit and proper sealed connections, eliminating installation guesswork and reducing the need for expensive dealer parts.

Key Features:

• EPDM tube construction with synthetic fiber knit reinforcement for superior durability
• Heat- and ozone-resistant EPDM cover withstands harsh under-hood environments
• Engineered to resist electrochemical degradation (ECD), the leading cause of coolant hose failure
• Pre-shaped design ensures perfectly sealed conditions and eliminates installation strain
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R4 EC Class D1 specifications
• Approved for marine applications

Gates molded coolant hoses feature specifically engineered materials that resist vacuum collapse, reducing the need for internal springs in many applications. The advanced EPDM compound resists the electrochemical degradation that occurs when coolant, hose material, and metal fittings create a galvanic reaction, preventing the micro-cracks and reinforcement breakdown that lead to premature failure. Gates recommends replacing hose clamps each time a new coolant hose is installed for optimal performance and leak prevention.