Dayco 71542 Radiator Coolant Hose - Upper

Dayco 71542 Curved Radiator Hose

Dayco 71542 is a curved radiator coolant hose built for the upper cooling circuit on select Nissan applications. It uses EPDM construction and a black finish, with matching 1 11/32-inch inside diameters at both ends for a direct replacement-style fit.

Compatible with 1989-1998 Nissan 240SX, upper, this hose supports coolant flow through the radiator connection on the vehicle’s upper hose route. The Dayco Curved Radiator Hose line focuses on application-specific shapes and dimensions for service replacement work, and 71542 follows that approach for the 240SX cooling system.

Key Features

• EPDM rubber construction for cooling-system service
• Black finish for a clean OE-style appearance
• Curved radiator hose profile for the upper hose routing
• 1 11/32-inch inside diameter at both ends
• Single I.D. hose design
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits 1989-1998 Nissan 240SX, upper

Detailed Description

Dayco 71542 is a radiator coolant hose engineered for the upper radiator connection on the Nissan 240SX. Its EPDM material is commonly used in cooling-system hoses for resistance to heat and coolant exposure, while the curved shape helps match the factory routing. If you are replacing a worn upper hose on a 1989-1998 Nissan 240SX, this part number provides the correct size and configuration for that application. This part cross-references Gates 22197 for the same application.

Common Issues This Hose Can Address

• Cracked or aged upper radiator hose material
• Coolant seepage at the hose connection points
• Softening, swelling, or collapse of the existing hose
• Loss of proper coolant circulation through the upper hose route
• Fitment problems caused by an incorrect replacement hose

Installation Notes and Tips

Inspect the radiator neck and engine-side connection before installation, and replace any damaged clamps or corroded fittings as needed. Confirm the hose orientation matches the upper routing on the vehicle before securing it, and verify that the hose seats fully on both ends without twisting. After installation, refill and bleed the cooling system according to the vehicle service procedure and check for leaks at operating temperature.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional standards for cooling-system service. Part number 71542 is built as a direct-fit replacement for the listed Nissan 240SX upper radiator hose application.