Dayco 72371 Radiator Coolant Hose - Upper

Dayco 72371 Upper Radiator Hose

Dayco 72371 is a curved radiator coolant hose built for upper cooling-system routing on select Chevrolet, Pontiac, and Saturn applications. It uses EPDM construction and a single I.D. hose design to match the shape and diameter requirements of the original cooling hose path.

Compatible with 2006-2010 Chevrolet Malibu, upper; 2006-2010 Pontiac G6, upper; and 2007-2008 Saturn Aura, upper. This Dayco Curved Radiator Hose is identified by part number 72371.

Key Features

• EPDM rubber construction for coolant-hose service
• Black finish for OE-style appearance
• 1 1/4 in. inside diameter at both ends
• Curved hose profile for upper radiator routing
• Single I.D. hose design
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Product Details

Dayco’s Curved Radiator Hose line focuses on replacement hoses shaped for specific cooling-system layouts. Part number 72371 follows that approach with a formed profile and matching 1 1/4 in. end diameters to support proper coolant flow in upper radiator applications. It is a direct-fit style hose for the Chevrolet Malibu, Pontiac G6, and Saturn Aura applications listed above, making it a practical choice when replacing a worn or damaged upper coolant hose.

This part cross-references ACDelco 26540X and Gates 23122 for the same application.

Common Problems This Hose Can Address

• Cracked or split upper radiator hose
• Coolant leaks at the hose body or ends
• Softening, swelling, or deterioration from heat and age
• Restricted coolant transfer caused by a failing hose
• Loss of proper hose shape in the upper cooling circuit

Installation Notes and Tips

Verify hose routing, end diameter, and upper-position fitment before installation. Inspect the radiator neck and engine-side connection points for corrosion, residue, or sharp edges that could affect sealing. Replace clamps if they are worn or no longer hold consistent tension, and refill the cooling system with the correct coolant after installation. Bleed air from the system according to the vehicle service procedure.

Quality Assurance

This Dayco radiator coolant hose is manufactured to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for hose construction and performance.