Gates 51553 Molded Coolant Hose

The Gates 51553 is a precision-molded HVAC heater hose designed to deliver OEM-quality performance for cooling system applications. This pre-shaped coolant hose is engineered to provide a perfect fit and ensure properly sealed connections in your vehicle's heating and cooling system.

Key Features:

• EPDM rubber construction with synthetic fiber knit reinforcement for superior durability
• Pre-molded design ensures exact fit and eliminates installation difficulties
• Engineered to resist electrochemical degradation (ECD), the leading cause of coolant hose failure
• Heat and ozone resistant EPDM cover withstands harsh engine compartment conditions
• 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 materials specifically engineered to resist vacuum collapse, and are designed to handle modern extended-life coolants. The EPDM compound resists the electrochemical degradation that occurs when coolant, hose, and metal fittings create a galvanic reaction, preventing premature cracking and failure. Gates recommends replacing hose clamps when installing new coolant hoses for optimal sealing performance.