Gates 18751 Small I.D. Molded Heater Hose 5/8 in. x 3/4 in. x 13-7/8 in.

The Gates 18751 is a factory-molded, small I.D. coolant hose engineered to fit the tighter, more compact engine compartments found in modern vehicles. Built to OEM specifications, this hose delivers reliable performance as a direct replacement for heater and coolant circuit applications.

Key Features:

• EPDM construction with synthetic fiber knit reinforcement and EPDM cover for long-lasting durability
• Electrochemical degradation resistance — specifically engineered to combat the leading cause of hose failure
• Meets SAE 20R3 Type EC Class D-1 and D-2 specifications for reliable, standards-compliant performance
• Temperature range: -40°F to 275°F (-40°C to 135°C)
• Approved for marine applications in addition to automotive use
• Pre-molded shape ensures a precise fit and properly sealed connections without unnecessary stress on fittings
• Suitable for coolant, water, and air transfer applications

Specifications:

• End 1 Inside Diameter: 5/8 in. (16mm)
• End 2 Inside Diameter: 3/4 in. (19mm)
• Centerline Length: 13-7/8 in. (353mm)
• Material: EPDM Rubber
• Color: Black
• Branches: None (straight molded)
• Sold individually

Gates recommends replacing hose clamps — ideally with Gates PowerGrip® SB Clamps — every time a new coolant hose is installed to ensure a leak-free seal.