Dayco 71427 Radiator Coolant Hose - Lower or Upper

Curved Radiator Hose for Cooling System Service

Dayco 71427 is a curved radiator coolant hose built for select Jeep, Cadillac, Chevrolet, and Oldsmobile applications. This Dayco Curved Radiator Hose uses EPDM construction and a dual I.D. design to match the cooling system routing and diameter transition required by the listed vehicles.

Compatible With 1991-1995 Jeep Wrangler upper radiator hose applications, as well as 1985-1986 Cadillac Cimarron, Chevrolet Cavalier, and Oldsmobile Firenza lower radiator hose applications. The Dayco 71427 is a direct-fit cooling hose for vehicles that need a curved hose profile and dual inside diameters.

Key Features

• EPDM rubber construction for radiator coolant service
• Black finish for a clean OE-style appearance
• Dual I.D. hose design with 1 1/4 in. and 1 1/2 in. inside diameters
• Curved hose shape for routed cooling system connections
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco 71427 part number for easy identification

Product Details

Dayco’s Curved Radiator Hose line is made for cooling system service where the hose must follow a formed path and maintain proper coolant flow between components. Part number 71427 is an EPDM radiator coolant hose with a dual inside diameter layout, making it suitable for applications that transition between 1 1/4 in. and 1 1/2 in. connections. It is a black hose with no heat shield and no protective sleeve, keeping the design straightforward for the specified fitments.

This part cross-references ACDelco 20073S and Gates 20793 for the same application. For buyers searching by vehicle, Dayco 71427 is a relevant match for Jeep Wrangler upper radiator hose service and for lower hose replacement on Cadillac Cimarron, Chevrolet Cavalier, and Oldsmobile Firenza models.

Common Uses

• Replacing a cracked or leaking radiator coolant hose
• Restoring proper coolant circulation in a curved hose routing
• Addressing hose swelling, soft spots, or age-related rubber breakdown
• Correcting fitment on dual-diameter cooling system connections
• Servicing upper or lower radiator hose locations on listed vehicles

Installation Notes

Verify hose routing, end diameters, and position before installation. Dayco 71427 is listed for upper radiator hose use on 1991-1995 Jeep Wrangler and lower radiator hose use on 1985-1986 Cadillac Cimarron, Chevrolet Cavalier, and Oldsmobile Firenza. Inspect clamps, necks, and adjoining cooling system parts for wear or corrosion before installing the new hose.

Quality Assurance

This hose is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and performance standards for radiator coolant service.