Gates 51984 Molded HVAC Heater Hose

The Gates 51984 is a precision-molded HVAC heater hose designed for OEM-quality coolant routing in automotive heating and cooling systems. This factory-molded hose is pre-shaped to fit specific vehicle applications, ensuring proper fitment and sealed connections without modification.

Key Features:

• EPDM (ethylene propylene diene monomer) tube construction with synthetic fiber knit reinforcement for durability
• Heat and ozone-resistant EPDM cover for extended service life
• Engineered to resist electrochemical degradation (ECD), the leading cause of coolant hose failure
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Pre-molded design ensures accurate fit and proper sealing
• Resists vacuum collapse in most applications without internal springs

Gates molded coolant hoses meet or exceed SAE industry standards for coolant system applications. The advanced EPDM compound resists the chemical breakdown that occurs when coolant, hose material, and metal fittings create electrochemical reactions. This results in longer hose life and reduced risk of cooling system failure. Gates recommends replacing hose clamps when installing new coolant hoses for optimal sealing performance.