Dayco 71135 Radiator Coolant Hose - Upper

Dayco Curved Radiator Hose 71135

Dayco 71135 is a curved upper radiator coolant hose built from EPDM for dependable coolant routing in a range of import and domestic applications. With 1 1/4-inch inside diameters on both ends, this black single I.D. hose is shaped for upper radiator connections where a formed hose is required.

Key Features

• EPDM construction for coolant-system service
• Black curved radiator hose design
• 1 1/4-inch inside diameter at both ends
• Single I.D. hose configuration
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Upper radiator hose application for selected Mazda, Toyota, Buick, Chevrolet, Oldsmobile, Pontiac, and Mitsubishi vehicles

Product Details

The Dayco Curved Radiator Hose line is engineered for formed coolant routing where straight hose stock will not match the factory path. Part number 71135 follows the curved upper hose profile used on applications such as the 2003-2008 Mazda 6, 1987-1991 Toyota Camry, and 1982-1990 Buick Century, along with additional Chevrolet Celebrity, Oldsmobile Cutlass Ciera, Oldsmobile Cutlass Cruiser, Pontiac 6000, Mazda MX-3, Mazda 323, and 1987 Mitsubishi Galant fitments. This hose cross-references Gates 21361 for the same application.

Common Uses

• Replacing a cracked or softened upper radiator hose
• Restoring coolant flow after hose swelling or collapse
• Addressing coolant seepage at the hose connection points
• Correcting a worn formed hose on upper radiator routing
• Servicing vehicles with factory air conditioning or without A.C., depending on application notes

Installation Notes

Verify the hose shape, end diameters, and vehicle notes before installation. Confirm upper hose routing against the original part, especially on 1982-1990 Buick Century, Chevrolet Celebrity, Oldsmobile Cutlass Ciera, Oldsmobile Cutlass Cruiser, and Pontiac 6000 applications that list A.C. and non-A.C. variations. Inspect the radiator necks and engine fittings for corrosion or residue, then seat the hose fully and secure it with the correct clamps.

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 coolant-system service.