Dayco 72339 Radiator Coolant Hose - Lower - Tee To Engine or Upper - Radiator To Filler Neck

Curved Radiator Hose for Select Nissan and GM Vehicles

Dayco Curved Radiator Hose 72339 is a radiator coolant hose built from EPDM for dependable coolant transfer in select applications. It uses a single I.D. hose design with a protective sleeve and a black finish for a clean OE-style appearance.

Compatible with 2013-2019 Nissan Sentra upper radiator to filler neck applications, as well as 2006 Chevrolet Cobalt, 2006 Pontiac Pursuit, and 2006 Saturn Ion lower tee to engine applications, this hose is shaped for the routing required by those cooling systems. Dayco 72339 is a direct-fit style replacement for vehicles that need a curved radiator hose with matching end diameters.

Key Features

• EPDM construction for coolant-system service
• Black finish for OE-style appearance
• Single I.D. hose design
• 1 5/16 in. inside diameter at both ends
• Protective sleeve included; heat shield not included
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose profile for routed cooling connections

Product Details

Dayco Curved Radiator Hose 72339 is part of the Dayco Curved Radiator Hose line, a cooling-hose range focused on shaped replacement hoses for specific vehicle routing and connection points. This hose is made from EPDM and measures 16 in. in trunk height, with 1 5/16 in. inside diameter at each end. The protective sleeve adds abrasion resistance where the hose passes near surrounding components, while the curved form supports the factory-style path used in the cooling circuit.

This part cross-references ACDelco 22575M and Gates 23161 for the same application.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged radiator hose
• Softening, swelling, or deterioration of an original EPDM hose
• Poor hose routing after replacement of a damaged cooling line
• Loss of coolant flow between the radiator, filler neck, tee, or engine connection
• Visible wear where the hose contacts nearby engine-bay components

Installation Notes and Tips

Verify the hose routing, end diameters, and connection points before installation. For 2013-2019 Nissan Sentra, this hose is used at the upper radiator to filler neck position; for 2006 Chevrolet Cobalt, 2006 Pontiac Pursuit, and 2006 Saturn Ion, it is used at the lower tee to engine position. Inspect clamps, mating necks, and adjacent cooling-system parts for wear or corrosion before installing the new hose.

Quality Assurance

Dayco 72339 is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for radiator hose applications. Those specifications help define material and performance expectations for coolant-system service in the listed vehicles.