Dayco 71288 Radiator Coolant Hose - Upper

Dayco Curved Radiator Hose 71288

Dayco 71288 is a curved radiator coolant hose built for upper cooling-system routing on select Chevrolet and GMC trucks and SUVs. It uses EPDM construction and a dual I.D. design to match the varying connection sizes found in the application.

Compatible with 1986-1993 Chevrolet S10, upper; 1991-1993 GMC Sonoma, upper; 1986-1990 GMC S15, upper; 1986-1989 Chevrolet S10 Blazer, upper; and 1986-1989 GMC S15 Jimmy, upper. This part cross-references Gates 20820 for the same application.

Key Features

• EPDM rubber construction for coolant hose service
• Black finish for a factory-style appearance
• Dual I.D. hose with 1 1/4 in. and 1 1/2 in. inside diameters
• Curved upper radiator hose profile for listed applications
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco Curved Radiator Hose line for application-specific cooling system routing

Product Details

Dayco 71288 is a radiator coolant hose for upper hose routing where the cooling system requires a curved shape and different end diameters. The EPDM material is selected for coolant exposure, while the dual I.D. configuration supports the connection sizes called out for the listed Chevrolet S10, Chevrolet S10 Blazer, GMC S15, GMC S15 Jimmy, and GMC Sonoma applications. The hose measures 20 1/2 in. in trunk height and does not include a heat shield or protective sleeve.

Common Cooling System Issues

• Cracked or hardened upper radiator hose
• Coolant seepage at hose connections
• Softening, swelling, or collapse of an aging hose
• Incorrect hose routing on replacement service
• Loss of cooling-system integrity from worn rubber

Installation Notes

Verify the vehicle year, make, model, and upper hose routing before installation. Compare the existing hose shape and both end inside diameters to the replacement part, and inspect the radiator neck and engine outlet for corrosion or damage before fitting the hose. Use proper coolant service procedures and confirm clamp placement after installation.

Quality Assurance

Dayco 71288 is manufactured to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for radiator hose applications. The Dayco Curved Radiator Hose line is built for direct-fit cooling system service on the listed vehicles.