Dayco 71781 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71781

The Dayco Curved Radiator Hose 71781 is designed specifically for Chevrolet Astro and GMC Safari vehicles. Engineered with durable EPDM material and a protective sleeve, this radiator coolant hose ensures reliable performance in your vehicle's cooling system.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Black color with a curved design for precise fitment
• Single inside diameter hose with 1 5/16 inch ends on both sides
• Includes a protective sleeve for added durability
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 23 inches for proper routing

Detailed Product Description

The Dayco Curved Radiator Hose 71781 is a radiator coolant hose tailored for the cooling systems of Chevrolet Astro and GMC Safari models. Made from EPDM (ethylene propylene diene monomer) rubber, this hose offers excellent resistance to heat, ozone, and coolant chemicals, which helps maintain system integrity under demanding conditions. Both ends of the hose have an inside diameter of 1 5/16 inches, ensuring a secure connection to the radiator and engine fittings. The hose features a protective sleeve to guard against abrasion and external damage, although it does not include a heat shield. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant applications. The curved design and 23-inch trunk height facilitate proper installation and routing within the engine bay.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line focuses on delivering hoses with precise bends and dimensions to match specific vehicle cooling system layouts. This product line emphasizes fitment accuracy and durability, reducing the need for modifications during installation. The 71781 part is part of this line, providing a direct replacement hose engineered to meet the exact specifications required by Chevrolet Astro and GMC Safari models.

Common Applications and Problem Solving

• Replacement of worn or cracked radiator coolant hoses
• Prevention of coolant leaks due to hose degradation
• Restoration of proper coolant flow in Chevrolet Astro and GMC Safari vehicles
• Addressing overheating issues caused by compromised hoses
• Ensuring secure hose connections with correct diameter and fitment

Installation Notes and Tips

Before installation, verify that the hose dimensions match your vehicle’s requirements. The 1 5/16 inch inside diameter ends should fit snugly on the radiator and engine fittings. Use appropriate clamps to secure the hose and prevent leaks. Inspect the protective sleeve for any damage prior to installation. Avoid twisting or stretching the hose excessively during installation to maintain its integrity and fitment.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71781 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for radiator coolant hoses. The use of EPDM material and protective sleeve enhances durability and service life. Warranty details should be confirmed with the original equipment manufacturer or supplier.