Dayco 72798 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 72798

The Dayco Curved Radiator Hose 72798 is designed specifically for BMW 540i, 740i, and 740iL models. Constructed from durable EPDM material, this branched radiator coolant hose ensures reliable performance in your vehicle's cooling system.

• Material: EPDM for heat and chemical resistance
• Color: Black
• Branched hose design with three ends
• End 1 and End 2 inside diameter: 1 1/2 inches
• End 3 inside diameter: 15/32 inches
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Trunk height: 14 inches
• Does not include heat shield or protective sleeve

Detailed Product Description

The Dayco Curved Radiator Hose 72798 is engineered to meet the specific cooling requirements of select BMW vehicles, including the 540i, 740i, and 740iL. Made from EPDM (ethylene propylene diene monomer), this hose offers excellent resistance to heat, ozone, and coolant chemicals, ensuring durability and longevity under demanding engine conditions. The branched hose design features three connection points with precise inside diameters—1 1/2 inches for both End 1 and End 2, and 15/32 inches for End 3—allowing for proper coolant flow and fitment within the vehicle's cooling system. The hose's black color and 14-inch trunk height provide a clean, OEM-style appearance and fit.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line focuses on delivering hoses with specific bends and branches to accommodate complex cooling system layouts. This product line is designed to provide a precise fit and reliable coolant transfer for vehicles requiring non-linear hose configurations. The 72798 part exemplifies this with its branched design and exact dimensional specifications tailored for BMW models.

Common Applications and Problem Solving

• Replacement of worn or cracked radiator coolant hoses in BMW 540i, 740i, and 740iL
• Resolving coolant leaks caused by hose degradation
• Preventing engine overheating due to compromised coolant flow
• Maintaining proper coolant circulation in branched hose systems
• Ensuring compliance with OEM cooling system specifications

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 72798, ensure all connections are clean and free of debris. Verify that the hose is routed correctly to avoid kinks or contact with moving engine parts. Use appropriate clamps to secure each end firmly, matching the specified inside diameters of 1 1/2 inches and 15/32 inches. Since this hose does not include a heat shield or protective sleeve, consider additional protection if routing near high-temperature components.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 72798 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring material and performance quality. This hose is built to withstand the thermal and chemical demands of automotive cooling systems. Warranty details should be confirmed with the original equipment provider or distributor.