Dayco 70659 Radiator Coolant Hose - Lower or Upper

Overview of Dayco Curved Radiator Hose 70659

The Dayco Curved Radiator Hose 70659 is designed for reliable coolant flow in select Chevrolet, Oldsmobile, and Pontiac vehicles. Engineered with durable EPDM material, this dual inside diameter hose supports efficient engine cooling in models like the Chevrolet Impala and Pontiac GTO.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 1 1/2 inch and 1 3/4 inch ends for precise fitment
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 19 inches suitable for curved radiator hose applications

Detailed Product Description

The Dayco Curved Radiator Hose 70659 is a dual inside diameter hose designed to replace original equipment in various classic and late-model vehicles. Made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, this hose ensures durability and long service life. The hose features a 1 1/2 inch inside diameter on one end and a 1 3/4 inch inside diameter on the other, allowing it to connect different radiator and engine fittings securely. It does not include a heat shield or protective sleeve, which is consistent with many OEM radiator hose designs. The hose complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for coolant system applications.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line focuses on providing hoses with specific bends and dual inside diameters to match factory configurations. This product line is engineered to maintain proper coolant flow and fitment in vehicles requiring curved hose designs, such as the Chevrolet Caprice and Oldsmobile Delta 88. The 70659 part number is part of this line, offering a direct replacement option that meets OEM specifications.

Compatible Vehicles and Common Applications

• Chevrolet models including Bel Air, Caprice, El Camino, Impala, Malibu
• Oldsmobile models such as Delta 88, Custom Cruiser, Laurentian, Parisienne
• Pontiac models including Bonneville, Catalina, Grand Am, Grand LeMans, GTO, LeMans, Tempest

Installation Notes and Tips

• Ensure the hose ends match the radiator and engine fitting diameters (1 1/2 inch and 1 3/4 inch)
• Inspect hose clamps and replace if worn to prevent leaks
• Verify routing to avoid kinks or contact with moving parts
• Drain coolant before removal to minimize spills
• Check for proper seating and secure clamps after installation

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70659 to meet SAE standards for coolant hoses, ensuring reliable performance under typical operating conditions. While specific warranty details are not provided, Dayco products generally adhere to industry quality controls and are designed for durability in automotive cooling systems.