Gates 19040 Small I.D. Molded Coolant Hose 0.63 in. ID 19.7 in. Length

The Gates 19040 is a factory-molded, small inside diameter (Small I.D.) coolant hose engineered as a direct OE replacement. With a 0.63 in. inside diameter and a 19.7 in. centerline length, this hose is precision-shaped for a valve-to-intake-manifold coolant routing application, delivering an exact-fit installation without cutting or modification.

Gates Small I.D. molded coolant hoses are constructed with an EPDM tube, synthetic fiber knit reinforcement, and an EPDM cover, providing exceptional resistance to heat, ozone, and chemical coolants. The hose is specifically engineered to combat Electrochemical Degradation (ECD) — the leading cause of coolant hose failure — which occurs when the hose, liquid coolant, and engine fittings form a galvanic cell that causes micro-cracks to develop in the hose tube.

Key Features:

• Inside Diameter: 0.63 in. (5/8 in.)
• Centerline Length: 19.7 in.
• Application: Valve to Intake Manifold coolant routing
• Construction: EPDM tube, synthetic fiber knit reinforcement, EPDM cover
• Temperature Range: -40°F to +275°F (-40°C to +135°C)
• Meets SAE 20R3 EC Class D1 standard
• Engineered to resist Electrochemical Degradation (ECD)
• Approved for marine applications
• OE replacement fit — sold individually
• Backed by a lifetime Gates limited warranty

Gates Small I.D. coolant hoses are factory-molded to exact manufacturer specifications, ensuring a secure, leak-free fit in today's smaller, tighter engine compartments. Suitable for coolant, water, and air applications. Gates recommends replacing hose clamps each time a new coolant hose is installed.