Dayco 71280 Radiator Coolant Hose - Lower

Overview of Dayco Curved Radiator Hose 71280

The Dayco Curved Radiator Hose 71280 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 heat-resistant EPDM material for durability
• Black color with protective sleeve for added abrasion resistance
• Dual inside diameter hose: 1 7/16" on one end and 1 1/2" on the other
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height measures 12 3/4" for precise fitment
• Compatible with Ford B4000, Bronco II, Explorer, Ranger, and Mazda Navajo

Details on the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose product line focuses on delivering radiator coolant hoses with specific bends and dual inside diameters to accommodate varying radiator and engine inlet sizes. This design ensures a secure fit and proper coolant flow in vehicles requiring non-linear hose routing. The 71280 part number exemplifies this with its dual i.d. hose construction and protective sleeve, tailored for select Ford and Mazda models.

Technical Description and Features

This radiator coolant hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for under-hood applications. The hose features a dual inside diameter design, measuring 1 7/16" on one end and 1 1/2" on the other, allowing it to connect different sized fittings securely. The black hose includes a protective sleeve to guard against abrasion, although it does not contain a heat shield. It meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry coolant hose requirements. The trunk height of 12 3/4" supports proper routing and fitment in the engine bay.

Common Applications and Problem Solving

• Replacement of worn or cracked radiator coolant hoses in Ford B4000 and Bronco II
• Addressing coolant leaks caused by hose degradation in Mazda Navajo and Ranger
• Resolving improper fitment issues due to varying inlet sizes with dual i.d. hose design
• Preventing abrasion damage with the included protective sleeve
• Maintaining coolant system integrity in Ford Explorer models

Installation Notes and Tips

Ensure the engine is cool before removing the old radiator hose to avoid burns. Verify the hose ends match the radiator and engine inlet diameters (1 7/16" and 1 1/2") for proper fit. Use appropriate clamps to secure the hose and check for leaks after installation. The protective sleeve should be positioned to face areas prone to abrasion. Inspect surrounding components for wear during replacement to maintain system reliability.

Quality Assurance and Warranty

Dayco radiator hoses are manufactured to meet SAE specifications, providing consistent quality and performance. The 71280 hose undergoes rigorous testing to ensure durability and resistance to heat and coolant exposure. While specific warranty details are not provided here, Dayco products typically come with manufacturer-backed warranties covering defects in materials and workmanship.