Dayco 71409 Radiator Coolant Hose - Upper - Pipe To Engine

Overview of Dayco Curved Radiator Hose 71409

The Dayco Curved Radiator Hose 71409 is designed for reliable cooling system performance in select Nissan vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent heat resistance and flexibility for Nissan D21, Maxima, and Pathfinder models.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Black single inside diameter hose with 7/8 inch diameter on both ends
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height measures 9 1/4 inches for precise fitment
• Designed without heat shield or protective sleeve for direct coolant flow

Details on the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose product line focuses on delivering hoses shaped to accommodate specific engine bay layouts, improving coolant flow and installation ease. The 71409 part number represents a single inside diameter hose tailored for Nissan vehicles, providing a reliable replacement option that meets industry SAE standards for radiator coolant hoses.

Technical Description and Specifications

This radiator coolant hose features a uniform 7/8 inch inside diameter on both ends, making it suitable for consistent coolant flow without restriction. The EPDM material offers resistance to heat, ozone, and coolant chemicals, which is essential for maintaining system integrity under operating temperatures. The hose’s trunk height of 9 1/4 inches ensures proper routing within the engine compartment of Nissan D21, Maxima, and Pathfinder models. It does not include a heat shield or protective sleeve, which is typical for this hose type and application.

Applications and Common Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Nissan D21, Maxima, and Pathfinder
• Prevention of coolant leaks caused by hose degradation or swelling
• Restoration of proper coolant flow to avoid engine overheating
• Addressing hose collapse or blockage that impairs cooling system efficiency
• Ensuring compatibility with OEM cooling system specifications

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71409, ensure the hose is routed without kinks or sharp bends to maintain coolant flow. Verify that the 7/8 inch inside diameter matches the radiator and engine fittings on your Nissan D21, Maxima, or Pathfinder. Use appropriate clamps to secure the hose ends and check for leaks after installation. It is recommended to replace any worn clamps or related components during installation for optimal performance.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71409 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for radiator coolant hoses. The EPDM material and construction provide durability under typical operating conditions. Warranty details should be confirmed with the original equipment manufacturer or distributor, as they may vary by region.