Dayco 72221 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose for Jeep Cooling Systems

The Dayco 72221 is a curved radiator coolant hose built for lower cooling-system routing on select Jeep applications. Made from EPDM rubber and finished in black, it is shaped to match the factory-style hose path for the Jeep Commander and Jeep Grand Cherokee.

For buyers searching for a lower radiator hose for 2005-2010 Jeep Grand Cherokee or 2006-2010 Jeep Commander, this Dayco curved radiator hose provides a direct-fit replacement option. The Dayco 72221 part number is also a useful reference when comparing OE-style cooling hose replacements.

Key Features

• EPDM construction for coolant-hose service
• Black finish for a factory-style appearance
• Single I.D. hose design
• 1 25/32 in. inside diameter at both ends
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose profile for lower hose routing
• Dayco 72221 identification for easy cross-reference

Product Details

Dayco Curved Radiator Hose 72221 is engineered as a lower radiator coolant hose for vehicles that require a formed hose with matching end diameters and a curved layout. The EPDM material is commonly used in cooling-system hoses for its resistance to heat and coolant exposure, while the single I.D. hose construction supports a straightforward OE-style replacement. This hose is listed for 2005-2010 Jeep Grand Cherokee, lower, and 2006-2010 Jeep Commander, lower.

This part cross-references ACDelco 24553L and Gates 23040 for the same application.

Common Cooling Issues This Hose Can Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose body or ends
• Softening, swelling, or deterioration from age and heat
• Incorrect hose shape or routing after prior repairs
• Loss of proper coolant circulation through the lower hose path

Installation Notes and Tips

Verify the hose routing, end diameters, and lower-position fitment before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm the hose follows the original curved path without kinks or twist.

Quality Assurance

Dayco manufactures cooling-system components to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC for this hose. The Dayco 72221 is built as an OE-style replacement for Jeep cooling applications.