Gates 51512 Premium Molded Coolant Hose

The Gates 51512 Premium Molded Coolant Hose is a factory-molded, OEM-quality replacement coolant hose engineered for precise fit and long-lasting performance. Designed as a direct replacement for upper, lower, or bypass radiator hose applications, this hose is pre-shaped to ensure a perfectly sealed connection right out of the box.

Gates engineers this hose with a proprietary EPDM tube and cover compound specifically formulated to resist electrochemical degradation (ECD) — the leading cause of coolant hose failure. ECD occurs when the hose, liquid coolant, and metal fittings form a galvanic cell, triggering a chemical reaction that creates micro-cracks in the hose tube wall. Gates' advanced materials resist this process, extending service life and reducing the risk of unexpected coolant loss or roadside breakdowns.

Key Features:

• Pre-shaped, factory-molded construction for OEM-quality fit and sealed performance
• EPDM tube, synthetic fiber knit reinforcement, and heat- and ozone-resistant EPDM cover
• Engineered to resist electrochemical degradation (ECD) — the leading cause of hose failure
• Specifically engineered materials resist vacuum collapse
• Temperature range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R4 Class D2 and DIN 73411 Class A requirements
• Approved for marine applications

Gates recommends replacing hose clamps each time a new coolant hose is installed to ensure a leak-free seal. The Gates molded coolant hose line is one of the most comprehensive replacement lines on the market, making it a trusted choice for professional technicians and DIY mechanics alike.