Dayco 71566 Radiator Coolant Hose - Upper

Dayco 71566 Curved Radiator Hose Overview

Dayco 71566 is a curved radiator coolant hose built for coolant transfer in the engine cooling system. Made from EPDM rubber with a black finish, this single I.D. hose uses a 2-inch inside diameter at both ends and follows SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.

For drivers searching for a Dayco curved radiator hose, 71566, or a replacement radiator coolant hose for GM applications, this part is a direct-fit style cooling hose for vehicles that use a 2-inch hose connection. It is also a practical match for common make/model repair searches involving radiator hose replacement.

Key Features

• Brand: Dayco Curved Radiator Hose
• Part number: 71566
• EPDM construction for cooling-system hose service
• Black hose finish
• 2-inch inside diameter at both ends
• Single I.D. hose design
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• No heat shield and no protective sleeve

Product Details

Dayco 71566 is a curved radiator hose intended for coolant routing where a formed hose shape is required. The EPDM material is commonly used in radiator and heater hose applications because it handles engine bay temperatures and coolant exposure. With matching 2-inch end diameters, this hose is suited to vehicles that need a formed coolant hose with the same inlet and outlet size.

This part cross-references ACDelco 26215X and Gates 21989 for the same application. It is also a relevant search result for GM radiator hose replacement needs, including make/model keyword searches for Chevrolet and GMC cooling-system service.

Common Problems This Hose Can Address

• Cracked or hardened radiator hose material
• Coolant leaks at a worn hose section
• Collapsed or softened hose walls under heat and pressure
• Incorrect hose shape after prior repair work
• Restricted coolant flow caused by hose deterioration

Installation Notes and Tips

Verify the hose routing, end diameters, and formed shape before installation. Match the 2-inch inside diameter at both ends to the vehicle’s radiator and engine connections, and inspect adjoining necks, clamps, and coolant passages for wear or corrosion before reassembly. Proper coolant refill and bleed procedures should be followed after replacement.

Compatible With select GM cooling-system applications and common Chevrolet and GMC radiator hose replacement searches. For buyers comparing Dayco 71566 against other radiator coolant hose options, confirm the hose profile and connection size against the original part before installation.

Quality Assurance

Dayco manufactures cooling-system hoses to published SAE specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC, to support consistent material and dimensional requirements for radiator hose service.