Dayco 70749 Radiator Coolant Hose - Lower - Pipe To Radiator or Upper

Dayco 70749 Curved Radiator Hose

Dayco 70749 is a curved radiator coolant hose built for upper and lower cooling-system routing on a range of classic and late-model vehicles. Made from EPDM rubber with a black finish, it uses a single I.D. hose design with 1 1/4-inch inside diameter ends for a direct replacement-style fit.

The Dayco Curved Radiator Hose line focuses on OE-style cooling hose geometry and material selection for dependable coolant transfer. This hose follows the curved routing needed in applications such as Chevrolet Chevette, Ford Pinto, and Infiniti Q45 fitments, helping maintain proper hose alignment in tight engine bays.

Key Features

• EPDM construction for cooling-system durability
• Black finish for a factory-style appearance
• 1 1/4-inch inside diameter at both ends
• Single I.D. hose design
• Curved radiator hose profile for routed coolant connections
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Detailed Description

Dayco 70749 is a radiator coolant hose for vehicles that require a curved upper hose or a lower pipe-to-radiator connection. Its EPDM rubber construction is suited for coolant service, while the curved shape helps match the original hose path on applications including 1975-1976 Ford Pinto, 1977-1978 Mercury Bobcat, and 1999-2001 Infiniti Q45. This part number, 70749, is also referenced across multiple aftermarket and OE catalogs for the same application.

This part cross-references Gates (e.g., 20880, 21281) for the same application.

What It Helps Address

• Cracked or aged radiator hose rubber
• Coolant leaks at the hose connection points
• Improper hose routing in curved applications
• Softening, swelling, or deterioration from heat and coolant exposure
• Replacement needs on upper radiator hose or lower pipe-to-radiator layouts

Installation Notes and Tips

Verify the hose position before installation, since this part is listed for both upper and lower routing depending on vehicle application. Confirm the 1 1/4-inch end diameters and match the hose path to the original routing on the vehicle. Inspect clamps, necks, and adjoining cooling components before installing the new hose.

Quality Assurance

This Dayco hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC standards, supporting consistent material and dimensional requirements for cooling-system service.