Dayco 71756 Radiator Coolant Hose - Lower

Dayco 71756 Curved Radiator Hose

Dayco 71756 is a curved radiator coolant hose built for lower cooling-system routing on select Buick Regal applications. It uses EPDM construction and a single I.D. hose design with 1 1/2-inch inside diameter ends for a direct OE-style replacement on the specified vehicle fitment.

Compatible with 1986-1987 Buick Regal lower radiator hose applications, this hose is shaped to follow the factory coolant path and support reliable coolant transfer between the engine and radiator. The Dayco Curved Radiator Hose line is focused on application-specific hose geometry and material selection for cooling-system service.

Key Features

• Part number 71756 for application-specific lookup
• EPDM rubber construction for cooling-system use
• Curved radiator hose profile for lower hose routing
• 1 1/2-inch inside diameter at both ends
• Single I.D. hose design
• Black finish
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications

Detailed Description

This Dayco radiator coolant hose is engineered for the lower position on 1986-1987 Buick Regal models. The curved shape helps match the factory hose path, while the EPDM material is selected for use in engine cooling systems where heat, coolant exposure, and vibration are part of normal operation. If you are replacing a worn lower radiator hose on a Buick Regal, Dayco 71756 provides a direct-fit service part for the listed application.

This part cross-references ACDelco 26069X and Gates 21211 for the same application. Search terms such as 1986 Buick Regal lower radiator hose, 1987 Buick Regal curved coolant hose, and Dayco 71756 radiator hose can help identify the correct replacement.

Common Problems This Hose Can Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose body
• Softening or swelling from heat and age
• Incorrect hose shape on OE replacement service
• Restricted coolant flow caused by hose deterioration

Installation Notes and Tips

Verify the lower hose routing and end diameters before installation on the vehicle. Inspect hose necks, clamps, and adjoining cooling-system components for wear or corrosion before installing the replacement hose. Confirm the hose is seated fully on both connections and check the cooling system for leaks after refill and warm-up.

Quality Assurance

Dayco 71756 is built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for radiator hose service. The Dayco Curved Radiator Hose line is intended to support OE-style replacement needs for cooling-system maintenance on the listed Buick Regal applications.