Dayco 71073 Radiator Coolant Hose

Dayco 71073 Curved Radiator Hose Overview

Dayco 71073 is a curved radiator coolant hose made from EPDM rubber for reliable coolant transfer in the engine cooling system. With a 2 1/4 in. inside diameter at both ends and a black finish, this single I.D. hose is built for direct replacement use where the original hose follows a curved routing path.

Compatible With select Chevrolet Silverado and GMC Sierra cooling system applications, this hose supports common radiator hose replacement needs for trucks and SUVs that use a 2 1/4 in. connection size. Dayco 71073 is also cross-referenced to ACDelco 24150L and Gates 21393 for the same application.

Key Features

• EPDM construction for coolant hose service
• Curved radiator hose profile for routed cooling-system layouts
• 2 1/4 in. inside diameter at both ends
• Single I.D. hose design
• Black exterior finish
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 71073 for easy identification

Product Details

Dayco’s Curved Radiator Hose line focuses on replacement coolant hoses that match common OE-style routing and connection sizes. Part number 71073 uses EPDM material for the demands of engine cooling service, with a 16 1/2 in. trunk height and a curved shape that helps follow the original hose path in the vehicle. If you are replacing a worn radiator hose on a Chevrolet Silverado or GMC Sierra, this hose provides the correct 2 1/4 in. end sizing for applications that call for that dimension.

What It Helps Address

• Coolant leaks from cracked or aged radiator hoses
• Softening, swelling, or hardening of the original hose material
• Loss of coolant flow caused by hose deterioration
• Improper hose routing after a failed replacement hose
• Service needs on Chevrolet Silverado and GMC Sierra cooling systems

Installation Notes and Tips

Verify the hose routing, end diameters, and overall shape against the removed part before installation. Inspect hose clamps, radiator necks, and adjoining coolant pipes for wear or corrosion, and replace any damaged sealing surfaces before refilling the cooling system. Confirm that the hose follows the original curved path without kinks or twist points.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for radiator coolant hose service. The EPDM construction and OE-style curved form support consistent fit and cooling-system performance in the specified applications.