Dayco 71991 Radiator Coolant Hose - Lower

Overview of Dayco Curved Radiator Hose 71991

The Dayco Curved Radiator Hose 71991 is designed specifically for Jeep Grand Cherokee models, providing reliable coolant flow and engine temperature regulation. Constructed from durable EPDM material, this dual inside diameter hose ensures a precise fit and long-lasting performance.

• Made from high-quality EPDM rubber for heat and chemical resistance
• Dual inside diameters: 1 1/2 inch and 1 11/16 inch for secure connections
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 19 inches for proper routing in Jeep Grand Cherokee cooling systems

Detailed Product Description

The Dayco Curved Radiator Hose 71991 is engineered to meet the cooling system demands of Jeep Grand Cherokee vehicles. Its EPDM construction offers resistance to heat, ozone, and coolant chemicals, which helps maintain hose integrity under typical engine operating conditions. The hose features a dual inside diameter design, with one end measuring 1 1/2 inches and the other 1 11/16 inches, allowing for a secure and leak-free connection between radiator and engine components. This hose does not include a heat shield or protective sleeve, focusing on a straightforward, durable design that fits the specific routing requirements of the Jeep Grand Cherokee.

About the Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco is tailored to provide precise fitment and reliable coolant flow in vehicles requiring non-linear hose shapes. This product line addresses the need for hoses that accommodate complex engine bay layouts, such as those found in Jeep Grand Cherokee models. The 71991 part exemplifies this with its curved design and dual inside diameters, ensuring compatibility and performance within the cooling system.

Common Applications and Problem Solving

• Replacement of worn or cracked radiator coolant hoses in Jeep Grand Cherokee
• Resolving coolant leaks caused by hose degradation or improper fit
• Preventing engine overheating due to compromised coolant flow
• Addressing hose swelling or softening from heat exposure
• Ensuring proper coolant system pressure and flow with correct hose dimensions

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71991, ensure the hose is routed according to Jeep Grand Cherokee factory specifications to avoid kinks or interference with other engine components. Use appropriate clamps to secure both ends, matching the dual inside diameters of 1 1/2 inch and 1 11/16 inch. Inspect the radiator and engine fittings for corrosion or damage before installation to ensure a proper seal. It is recommended to replace coolant and flush the system if the old hose showed signs of failure.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71991 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for coolant hoses. The EPDM material and construction methods provide durability and resistance to typical automotive coolant system conditions. Warranty details should be confirmed with the original equipment manufacturer or supplier, as Dayco typically offers coverage against manufacturing defects.