Dayco 71531 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71531

The Dayco Curved Radiator Hose 71531 is designed for reliable coolant flow in select Ford and Mazda vehicles. Engineered with durable EPDM material and a dual inside diameter design, this radiator coolant hose supports efficient engine cooling for models like the Ford Explorer and Mazda Navajo.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 1 1/4 inch and 1 7/16 inch ends for precise fit
• Includes a protective sleeve to guard against abrasion
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Trunk height measures 14 1/2 inches for proper routing

Detailed Product Description

The Dayco Curved Radiator Hose 71531 is a specialized radiator coolant hose designed to meet the cooling system demands of Ford and Mazda trucks and SUVs, including the Ford Aerostar, B4000, Explorer, Navajo, and Ranger. Made from EPDM (ethylene propylene diene monomer) rubber, this hose offers excellent resistance to heat, ozone, and coolant chemicals, ensuring durability under engine operating conditions.

This hose features a dual inside diameter design, with one end measuring 1 1/4 inches and the other 1 7/16 inches, allowing for a secure and leak-free connection between different radiator components. The inclusion of a protective sleeve enhances abrasion resistance, extending the hose's service life. Although it does not contain a heat shield, the material and construction comply with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, confirming its suitability for automotive cooling systems.

About the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose line focuses on providing hoses with precise bends and dual diameter ends to accommodate specific vehicle cooling system layouts. This product line is engineered to maintain coolant flow efficiency while fitting tightly within engine compartments, reducing the risk of kinks or leaks. The 71531 part exemplifies this approach by combining material durability with a tailored shape for Ford and Mazda applications.

Common Applications and Problem Solving

• Replacement for cracked or leaking radiator coolant hoses in Ford Aerostar and Mazda Navajo
• Solves coolant flow restrictions caused by damaged or collapsed hoses
• Addresses fitment issues where dual diameter hose ends are required
• Prevents coolant leaks due to abrasion or hose wear
• Maintains proper engine temperature by ensuring reliable coolant circulation

Installation Notes and Tips

• Verify hose end diameters (1 1/4 inch and 1 7/16 inch) match vehicle connections before installation
• Inspect surrounding components for wear or damage during replacement
• Ensure clamps are properly tightened to prevent leaks without damaging the hose
• Route the hose to avoid contact with sharp edges or moving parts
• Replace any worn protective sleeves or heat shields as needed

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71531 to meet stringent SAE standards, ensuring consistent performance and durability. The EPDM material and protective sleeve contribute to long service life under typical operating conditions. Warranty coverage details should be confirmed with the original equipment manufacturer or supplier.