Dayco 71721 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71721

The Dayco Curved Radiator Hose 71721 is designed specifically for Chevrolet S10 and GMC Sonoma models. This radiator coolant hose ensures reliable coolant flow with precise fitment and durable EPDM construction.

• Material: EPDM for heat and chemical resistance
• Color: Black
• End 1 Inside Diameter: 1 9/32 inches
• End 2 Inside Diameter: 1 9/32 inches
• Hose Type: Single inside diameter hose
• SAE Specifications: SAE J20R4 Class D-1, SAE J1684 Type EC
• Trunk Height: 17 inches
• Compatible with Chevrolet S10 and GMC Sonoma

About the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose line focuses on delivering hoses with precise bends and dimensions to match specific vehicle cooling system requirements. This product line emphasizes durability and compliance with SAE standards, ensuring proper coolant flow and fitment for targeted applications such as the Chevrolet S10 and GMC Sonoma. The 71721 part maintains these standards with its EPDM material and exact inside diameters.

Detailed Product Description

The Dayco 71721 radiator coolant hose is constructed from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1 9/32 inches, making it a single i.d. hose designed to fit specific radiator connections on Chevrolet S10 and GMC Sonoma vehicles. The hose does not include a heat shield or protective sleeve, focusing on straightforward installation and reliable performance. It meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, ensuring it adheres to industry standards for coolant hoses.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses on Chevrolet S10 and GMC Sonoma
• Resolving coolant leaks caused by hose degradation
• Maintaining proper coolant flow to prevent engine overheating
• Addressing fitment issues with non-OEM hoses
• Upgrading to a hose that meets SAE specifications for durability

Installation Notes and Tips

• Verify hose inside diameters match radiator and engine fittings before installation
• Ensure clamps are properly tightened to prevent leaks without damaging the hose
• Inspect surrounding components for wear or damage during replacement
• Allow engine to cool before removing old hose to avoid burns
• Check for proper routing to avoid kinks or contact with moving parts

Quality Assurance and Warranty

Dayco manufactures the 71721 radiator hose to meet SAE standards, ensuring consistent quality and performance. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed quality assurance to support reliable operation in Chevrolet S10 and GMC Sonoma vehicles.