Dayco 71490 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71490

The Dayco Curved Radiator Hose 71490 is designed specifically for Nissan vehicles including the D21, Frontier, Pickup, and Xterra models. Constructed from durable EPDM material, this radiator coolant hose ensures reliable performance under typical engine cooling system conditions.

• Made from high-quality EPDM rubber for heat and chemical resistance
• Black color with a curved design for precise fitment
• Inside diameter of 1 5/16 inches on both ends for consistent coolant flow
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type without heat shield or protective sleeve
• Trunk height of 14 inches for proper routing in engine bay

Detailed Product Description

The Dayco Curved Radiator Hose 71490 is engineered to maintain optimal coolant circulation in Nissan D21, Frontier, Pickup, and Xterra vehicles. Its EPDM construction offers resistance to heat, ozone, and coolant chemicals, which helps extend hose life and maintain system integrity. The hose features a uniform inside diameter of 1 5/16 inches on both ends, ensuring a secure connection and consistent coolant flow. This single inside diameter hose does not include a heat shield or protective sleeve, making it suitable for applications where additional protection is not required. The hose complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, 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 dimensions to fit specific vehicle cooling system layouts. This product line is designed to replace original equipment hoses that require a curved shape for proper installation and coolant flow. The 71490 part number is part of this line, offering a direct fit for select Nissan models, ensuring compatibility and ease of installation.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Nissan D21, Frontier, Pickup, and Xterra
• Prevention of coolant leaks caused by hose degradation
• Restoration of proper coolant flow to avoid engine overheating
• Elimination of hose collapse or swelling under pressure
• Maintaining system pressure integrity in the cooling circuit

Installation Notes and Tips

• Ensure the engine is cool before removing the old radiator hose
• Check hose clamps and replace if corroded or damaged
• Verify the hose routing matches the original to avoid kinks or interference
• Use appropriate coolant compatible with EPDM hoses
• Tighten clamps securely but avoid over-tightening to prevent hose damage

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71490 to meet industry SAE specifications, ensuring reliable performance in automotive cooling systems. While specific warranty details are not provided, Dayco products typically adhere to strict quality control standards to support durability and fitment accuracy for Nissan D21, Frontier, Pickup, and Xterra vehicles.