Dayco 71131 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 71131

Dayco 71131 is a curved radiator coolant hose built for lower radiator routing on a range of GM and Pontiac performance and utility applications. It uses EPDM construction and a dual I.D. design to match the varying connection sizes found in the listed fitments.

For buyers searching for a lower radiator hose for a 1985-1992 Chevrolet Camaro or 1985-1992 Pontiac Firebird, this hose provides the correct curved profile and SAE-rated construction for the application.

Key Features

• EPDM rubber construction for coolant-system service
• Black finish for a factory-style appearance
• Dual I.D. hose with 1 1/2 in. end 1 and 1 3/4 in. end 2
• Curved radiator hose shape for lower hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits lower radiator hose applications across select Chevrolet, Pontiac, Buick, Oldsmobile, GMC, and Astro/Safari models

Product Details

Dayco’s Curved Radiator Hose line focuses on application-specific coolant routing, with formed shapes and sizing that follow the vehicle’s original hose path. Part number 71131 is a lower radiator coolant hose for select 1982-1992 vehicles, including Chevrolet Camaro, Pontiac Firebird, Chevrolet Monte Carlo, Buick Regal, Chevrolet El Camino, Oldsmobile Cutlass and Cutlass Supreme, Pontiac Grand Prix, Chevrolet Astro, GMC Safari, Pontiac Bonneville, Oldsmobile Cutlass Calais, Chevrolet Malibu, Oldsmobile Cutlass Cruiser, and Pontiac Grand LeMans. This part cross-references Gates 21324 for the same application.

The dual I.D. design helps address the different connection diameters used in the listed vehicles, while the EPDM material is suited for standard coolant exposure and underhood temperatures. If you are replacing a lower radiator hose on a 1983-1987 Buick Regal or a 1985-1986 Chevrolet Astro, Dayco 71131 matches the specified curved lower-hose layout.

Common Problems This Hose Can Address

• Cracked or hardened lower radiator hose material
• Coolant leaks at the hose ends
• Incorrect hose shape or routing after a previous repair
• Mismatch between radiator and engine-side hose diameters
• Service replacement for aging OE-style coolant hoses

Installation Notes and Tips

• Verify the vehicle’s lower hose routing and end diameters before installation.
• Inspect hose necks, clamps, and adjacent cooling-system components for wear or corrosion.
• Drain coolant as needed before removing the existing hose.
• Confirm clearance around belts, pulleys, and nearby engine components after installation.
• Use the fitment notes for vehicles with air conditioning or without A.C. and heavy-duty cooling configurations.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and dimensional standards for cooling-system service.