Dayco 72900 Radiator Coolant Hose - Upper

Durable Radiator Coolant Hose for Mazda 3 and 6 Models

The Dayco Curved Radiator Hose 72900 is engineered to provide reliable coolant flow for Mazda 3, Mazda 3 Sport, and Mazda 6 vehicles. Constructed from EPDM material, this black radiator coolant hose offers consistent performance under typical engine operating conditions.

• Material: EPDM for heat and chemical resistance
• Color: Black
• End 1 and End 2 Inside Diameter: 1 1/4 inches
• End 1 and End 2 Outside Diameter: 1 21/32 inches
• Hose Type: Single inside diameter hose
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk Height: 16 1/2 inches
• Does not include heat shield or protective sleeve

About the Dayco Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco is designed to accommodate specific radiator coolant routing requirements in various vehicle models. This product line focuses on delivering hoses with precise dimensions and material specifications to ensure proper fit and durability. The 72900 part number represents a curved hose variant tailored for select Mazda vehicles, providing a direct replacement that meets industry SAE standards.

Product Details and Specifications

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 engine cooling systems. Both ends of the hose have an inside diameter of 1 1/4 inches and an outside diameter of 1 21/32 inches, ensuring a secure fit on compatible radiator and engine connections. The hose length, indicated by the trunk height of 16 1/2 inches, supports proper coolant flow without kinking or restriction. It is a single inside diameter hose, designed for straightforward installation without additional protective sleeves or heat shields.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses on Mazda 3, Mazda 3 Sport, and Mazda 6
• Prevention of coolant leaks caused by hose degradation
• Restoration of proper coolant circulation to avoid engine overheating
• Addressing hose swelling or softening due to heat exposure
• Ensuring compliance with SAE J20R4 Class D-1 coolant hose standards

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 72900, ensure the engine is cool to prevent injury from hot coolant. Verify that the hose ends match the radiator and engine fittings by checking the inside and outside diameters. Use appropriate clamps to secure the hose ends firmly, avoiding overtightening that could damage the hose. Inspect adjacent components for wear or damage during installation to maintain overall cooling system integrity.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 72900 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, ensuring material and dimensional quality. This hose is designed for durability and consistent performance in compatible Mazda 3 and Mazda 6 models. Warranty details are provided by Dayco and should be confirmed at the time of purchase.