Dayco 71129 Radiator Coolant Hose - Lower

Durable Radiator Coolant Hose for Select GM Vehicles

The Dayco Curved Radiator Hose 71129 is engineered to provide reliable coolant flow for various Buick, Chevrolet, Oldsmobile, and Pontiac models. Designed with precision, this dual inside diameter hose ensures a secure fit and efficient cooling system performance.

• Constructed from EPDM material for heat and chemical resistance
• Black color for standard OEM appearance
• Dual inside diameters: 1 1/2 inch and 1 25/32 inch ends
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 19 1/2 inches for proper routing
• Does not include heat shield or protective sleeve

About the Dayco Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco focuses on delivering hoses with precise bends and dual inside diameters to accommodate specific radiator and engine connections. This product line is designed to meet stringent SAE standards, ensuring compatibility and durability for cooling systems in classic and modern GM vehicles.

Product Details and Specifications

This radiator coolant hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals, making it suitable for long-term use in automotive cooling systems. The hose features two different inside diameters—1 1/2 inch on one end and 1 25/32 inch on the other—allowing it to connect components with varying sizes securely. Its black color matches OEM styling, and the 19 1/2 inch trunk height supports proper installation without kinking. The hose meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its compliance with industry requirements for coolant hoses.

Compatible Vehicles and Common Applications

• Buick models including LeSabre and Regal
• Chevrolet models such as Caprice, Impala, Malibu, Monte Carlo, El Camino, and Custom Cruiser
• Oldsmobile models like the Cutlass and 88 series
• Pontiac models including Bonneville and Grand Prix
• G-series vans: G10, G20, G30

Installation Notes and Tips

• Verify hose dimensions and fitment with your vehicle’s cooling system before installation
• Ensure both radiator and engine connections are clean and free of debris
• Use appropriate clamps to secure the hose ends firmly
• Check for leaks after installation and during initial engine operation
• Replace any worn or damaged clamps to maintain a secure seal

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71129 to meet SAE specifications, ensuring consistent quality and performance. While specific warranty details are not provided, Dayco products typically adhere to industry standards for durability and reliability in automotive cooling applications.