Dayco 71416 Radiator Coolant Hose - Upper

Dayco Curved Radiator Hose 71416

Dayco 71416 is a curved radiator coolant hose built for upper cooling-system routing on select Buick, Oldsmobile, and Pontiac applications. It uses EPDM construction and a single I.D. hose design to match the shape and connection size needed for the listed vehicles.

Compatible with 1989-1991 Buick Skylark, upper; 1989-1991 Oldsmobile Cutlass Calais, upper; and 1989-1991 Pontiac Grand Am, upper. This Dayco curved radiator hose 71416 is specified for 1 5/16-inch inside diameter connections at both ends.

Key Features

• EPDM rubber construction for coolant hose service
• Black finish for a factory-style appearance
• Single I.D. hose design
• 1 5/16-inch inside diameter at End 1 and End 2
• Upper radiator hose application for listed vehicles
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Product Details

The Dayco Curved Radiator Hose line is shaped for applications that require a formed hose path rather than a straight universal hose. Part number 71416 follows the upper hose routing used on the 1989-1991 Buick Skylark, Oldsmobile Cutlass Calais, and Pontiac Grand Am, helping maintain proper coolant flow between the engine and radiator. The EPDM material is selected for cooling-system use, and the hose is engineered to meet SAE requirements for radiator hose performance.

This part cross-references ACDelco 22231M and Gates 21756 for the same application.

What It Helps Address

• Cracked or hardened upper radiator hose material
• Coolant leaks at the hose body or connection points
• Incorrect hose shape on a curved upper hose route
• Loss of cooling-system integrity from aged rubber
• Replacement needs on listed Buick, Oldsmobile, and Pontiac models

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position fitment before installation. Inspect the radiator neck and engine-side connection surfaces for corrosion, residue, or damage, and replace worn clamps as needed. Confirm the hose is seated fully and routed without kinks or twist before refilling and bleeding the cooling system.

Quality Assurance

Dayco manufactures this radiator coolant hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system hose applications.