Dayco 71278 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71278

The Dayco Curved Radiator Hose 71278 is designed specifically for Jeep Cherokee, Comanche, and Wagoneer models. This radiator coolant hose features a dual inside diameter design and is constructed from durable EPDM material to ensure reliable engine cooling performance.

• Material: EPDM for heat and chemical resistance
• Color: Black
• End 1 Inside Diameter: 1 1/4 inches
• End 2 Inside Diameter: 1 1/2 inches
• Hose Type: Dual inside diameter hose
• SAE Specifications: SAE J20R4 Class D-1, SAE J1684 Type EC
• Trunk Height: 17 inches
• Does not contain heat shield or protective sleeve

Detailed Description of the Curved Radiator Hose

The Dayco Curved Radiator Hose 71278 is engineered to meet stringent SAE standards, including SAE J20R4 Class D-1 and SAE J1684 Type EC, ensuring compatibility with cooling system requirements for Jeep Cherokee, Comanche, and Wagoneer vehicles. Made from EPDM, this hose offers resistance to heat, ozone, and coolant chemicals, which helps maintain durability and prevents premature failure. The dual inside diameter design allows for a secure fit on varying radiator and engine connections, with one end measuring 1 1/4 inches and the other 1 1/2 inches in diameter. The hose’s curved shape facilitates proper routing within the engine bay, reducing stress and potential kinks.

About the Dayco Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco focuses on providing hoses with precise bends and dual inside diameters to accommodate specific vehicle cooling system layouts. This product line is designed to replace original equipment hoses with exact fitment and material quality, ensuring consistent coolant flow and system integrity. The 71278 part number is a representative example tailored for Jeep models requiring a curved hose with dual diameters.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in Jeep Cherokee, Comanche, and Wagoneer
• Resolving coolant leaks caused by hose degradation or improper fit
• Preventing overheating due to compromised coolant flow
• Addressing hose swelling or softening from heat exposure
• Ensuring proper hose routing to avoid kinks and premature wear

Installation Notes and Tips

• Verify hose diameters and curvature match your vehicle’s radiator and engine connections
• Inspect clamps and replace if corroded or damaged to ensure a secure seal
• Drain coolant before hose removal to prevent spills
• Check for any debris or corrosion on connection points before installing the new hose
• After installation, refill coolant and bleed the system to remove air pockets

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71278 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring material and performance reliability. The EPDM construction provides resistance to heat and coolant chemicals, contributing to long service life. Warranty details should be confirmed with the original equipment manufacturer or supplier, as they may vary.