Dayco 71070 Radiator Coolant Hose - Upper

Curved radiator hose for Mercedes-Benz applications

Dayco 71070 is a curved radiator coolant hose built for upper cooling-system routing on select Mercedes-Benz trucks. It uses EPDM construction and a dual I.D. design to match the required hose connection sizes while maintaining a secure coolant path.

Key features

• EPDM rubber construction for coolant-system service
• Dual I.D. hose design with 1 1/2 in. and 1 3/4 in. end diameters
• Curved profile for upper hose routing
• Black finish for a clean OE-style appearance
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Detailed description

This Dayco radiator coolant hose is engineered for upper cooling-system use on Mercedes-Benz L1113, L1116, L1117, and L1316 models. The curved shape supports the routing required in these applications, while the dual inside diameter design helps match the connection points specified for the vehicle. Dayco 71070 is a practical replacement choice for owners servicing the cooling system on Mercedes-Benz L1113 and related models.

This part cross-references Duralast B71070 and Goodyear 61044 for the same application.

What this part is used for

• Replacing a cracked or aged upper radiator hose
• Restoring coolant flow through the cooling system
• Addressing leaks at hose connection points
• Correcting hose fitment when the original hose has hardened or collapsed
• Servicing a curved upper hose route on Mercedes-Benz trucks

Installation notes and tips

Verify the hose routing, end diameters, and upper-position application before installation. Inspect the mating necks and clamps for wear or corrosion, and replace any damaged sealing surfaces to help maintain a proper coolant seal. Confirm the hose follows the original curved path without kinks or twist.

Quality assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for coolant-hose service.