Dayco 72398 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 72398

Dayco 72398 is a curved lower radiator coolant hose built for specific Chevrolet Express and GMC Savana applications from 2000-2002. It uses EPDM construction with a protective sleeve to help manage underhood heat and abrasion in demanding cooling-system service.

Key Features

• EPDM rubber construction for coolant-system durability
• Dual I.D. hose design with 1 1/2 in. and 1 3/4 in. inside diameters
• Black finish with a protective sleeve for added surface protection
• Curved radiator hose profile for lower hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco curved radiator hose line for direct-fit cooling system service

Product Details

This Dayco curved radiator hose is engineered as a lower radiator coolant hose for 2000-2002 Chevrolet Express 1500, Express 2500, and Express 3500, as well as 2000-2002 GMC Savana 1500, Savana 2500, and Savana 3500. The dual I.D. design supports the different hose-end diameters required by these applications, while the EPDM material helps withstand coolant exposure and everyday engine-bay temperatures. Dayco 72398 is a practical replacement for service work on Chevrolet Express and GMC Savana cooling systems where the original lower hose has aged, softened, or cracked.

This part cross-references ACDelco 24397L and Gates 22425 for the same application.

What It Helps Address

• Coolant leaks from a cracked or deteriorated lower radiator hose
• Softening, swelling, or collapse of an aging coolant hose
• Heat-related hose wear in the lower engine compartment
• Restricted coolant flow caused by hose damage or internal breakdown
• Service replacement for a worn Chevrolet Express or GMC Savana radiator hose

Installation Notes and Tips

Verify the hose routing, end diameters, and lower-position fitment before installation. Inspect adjoining clamps, radiator necks, and engine fittings for corrosion or damage, and replace any worn components that could affect sealing. Confirm the hose follows the original curved path without twisting so coolant flow and clearance remain correct.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and performance standards for cooling-system service.