Dayco 71979 Radiator Coolant Hose - Lower

Dayco 71979 Curved Radiator Hose Overview

The Dayco 71979 curved radiator hose is a direct-fit coolant hose built for the lower radiator circuit on select Ford Escort models. Made from EPDM rubber and formed as a single I.D. hose, it is shaped to route coolant cleanly through the engine bay while maintaining a secure seal at both ends.

Compatible with 1998-2003 Ford Escort, lower, this Dayco Curved Radiator Hose supports the cooling system layout used on these vehicles. The Dayco 71979 is engineered to meet SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for radiator hose service.

Key Features

• EPDM construction for coolant hose durability
• Black finish for OE-style appearance
• Single I.D. hose design with 1 11/32 in. inside diameter at both ends
• Curved radiator hose profile for lower hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Fits 1998-2003 Ford Escort, lower

Product Details

This radiator coolant hose is shaped for the lower hose position on the Ford Escort cooling system and is sized with matching 1 11/32 in. end diameters for consistent connection at both ends. EPDM material is commonly used in coolant applications because it handles heat and exposure to engine coolant in normal service. If you are replacing a worn lower radiator hose on a 1998-2003 Ford Escort, the Dayco 71979 provides the correct curved routing and fitment profile. This part cross-references Ford (e.g., F8KE-8B273-AE, F8KZ-8286-AA) for the same application.

Common Problems This Hose Can Address

• Coolant leaks from cracked or aged lower radiator hose material
• Softening, swelling, or collapse of the hose under operating temperature
• Improper hose routing caused by a damaged or misshaped replacement hose
• Loss of cooling-system pressure at the lower radiator connection
• Visible wear, hardening, or deterioration on the original Ford Escort hose

Installation Notes and Tips

Verify the lower hose routing and end diameters before installation on your Ford Escort. Inspect the radiator neck and engine-side connection for corrosion, residue, or sharp edges that can affect sealing. Replace coolant as needed after hose service, and confirm the system is properly filled and bled according to vehicle service procedures.

Quality Assurance

Dayco manufactures this hose to meet published SAE radiator hose specifications for coolant-system service. The 71979 is part of Dayco’s Curved Radiator Hose line, which focuses on formed hose routing for applications that require a specific bend and end size.