Dayco 72340 Radiator Coolant Hose - Lower

Dayco 72340 Lower Radiator Hose

Dayco Curved Radiator Hose 72340 is a lower radiator coolant hose built for direct replacement use in select Chevrolet cooling systems. It uses EPDM construction and a curved single I.D. hose profile to match the routing needed on the application.

Compatible with 2006-2011 Chevrolet Impala, lower, and 2006-2007 Chevrolet Monte Carlo, lower. This Dayco 72340 hose is sized with 1 5/16-inch inside diameter at both ends for a consistent coolant connection.

Key Features

• EPDM rubber construction for coolant system service
• Black finish
• Single I.D. hose design
• 1 5/16-inch inside diameter at both ends
• Curved radiator hose profile for lower hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

The Dayco Curved Radiator Hose line focuses on application-specific hose shapes that follow factory-style routing and connection points. Part number 72340 is a lower radiator coolant hose for Chevrolet Impala and Chevrolet Monte Carlo applications, with EPDM material selected for cooling-system use and a curved form that supports proper hose alignment in the engine bay. This part cross-references Gates 23123 for the same application.

Common Cooling System Issues

• Cracked or aged lower radiator hose material
• Coolant leaks at the hose connection points
• Improper hose routing from a worn or misshaped hose
• Softening, swelling, or deterioration from heat and coolant exposure
• Restricted coolant flow caused by hose collapse or internal wear

Installation Notes

Verify the hose routing and end diameters before installation. Inspect the radiator neck, engine connection, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm the hose is positioned without twists or kinks so coolant can circulate properly.

Quality Assurance

Dayco manufactures cooling-system hoses to meet published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC for this part.