Dayco 71291 Radiator Coolant Hose - Upper

Dayco Curved Radiator Hose 71291

Dayco 71291 is a curved radiator coolant hose built for upper radiator routing in select import and domestic applications. Made from EPDM rubber with a black finish, it uses a single I.D. hose design with 1 5/16-inch inside diameters at both ends for a direct replacement-style fit.

This Dayco Curved Radiator Hose line is focused on OE-style cooling system service, with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications that support proper coolant transfer in the radiator circuit. The 71291 part number is used across multiple vehicle platforms, including Geo Storm, Isuzu Pickup, and Toyota Corolla applications.

Key Features

• EPDM construction for cooling system use
• Black curved radiator hose design for upper hose routing
• 1 5/16-inch inside diameter at both ends
• Single I.D. hose configuration
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Direct replacement-style hose for select upper radiator applications

Vehicle Fitment

• Fits 1990-1993 Geo Storm, upper.
• Fits 1989 Geo Spectrum, upper.
• Fits 1985-1988 Chevrolet Spectrum, upper.
• Fits 1986-1988 Pontiac Sunburst, upper.
• Fits 1991-1993 Isuzu Stylus, upper.
• Fits 1985-1989 Isuzu I-Mark, upper.
• Fits 1983-1987 Isuzu Pickup, upper.
• Fits 1985-1986 Isuzu Pickup, upper, compatible with vehicles containing air conditioning.
• Fits 1983 Isuzu Pickup, upper, compatible with vehicles containing air conditioning.
• Fits 1985-1986 Isuzu Pickup, upper, w/o A.C., w/o P.S.
• Fits 1983 Isuzu Pickup, upper, w/o A.C., w/o P.S.
• Fits 1985-1986 Isuzu Pickup, upper, w/o A.C., w/P.S.
• Fits 1983 Isuzu Pickup, upper, w/o A.C., w/P.S.
• Fits 1980-1982 Toyota Corolla, upper, without power steering.
• Fits 1980-1982 Toyota Corolla, upper, serpentine belt compatible with vehicles equipped with power steering.
• Fits 1981-1982 Toyota Tercel, upper, w/A.P.
• Fits 1981-1982 Toyota Tercel, upper, w/o A.P.
• Fits 1987-1990 Volvo 760, upper.
• Fits 1987-1990 Volvo 780, upper.

What This Hose Helps Address

• Upper radiator hose leaks caused by age, heat cycling, or cracking
• Coolant loss from a worn or softened hose
• Restricted coolant flow from hose collapse or deformation
• Cooling system service on vehicles with curved upper hose routing
• Replacement needs for select Geo, Isuzu, Toyota, Chevrolet, Pontiac, and Volvo applications

Installation Notes and Tips

Verify hose routing, end diameters, and vehicle configuration before installation, especially on Isuzu Pickup and Toyota Corolla applications with air conditioning, power steering, or A.P. notes. Inspect hose clamps, thermostat housing, radiator necks, and adjacent cooling components for wear before installing the new hose. This part cross-references Gates (e.g., 21233, 21514) for the same application.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC standards for cooling system service. EPDM construction supports use in radiator coolant applications where heat and coolant exposure are expected.