Dayco 71664 Radiator Coolant Hose

Overview of Dayco Curved Radiator Hose 71664

The Dayco Curved Radiator Hose 71664 is designed specifically for BMW models including the 320i, 323i, 323is, 325i, 325is, 328i, 328is, M3, and Z3. This radiator coolant hose features a curved design and is constructed from durable EPDM material to ensure reliable performance in cooling systems.

• Constructed from EPDM for heat and chemical resistance
• Black single inside diameter hose with 1 19/32 inch ends
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved design tailored for specific BMW cooling system routing
• Trunk height of 12 inches for proper fitment and clearance

Detailed Product Description

The Dayco Curved Radiator Hose 71664 is engineered to maintain optimal coolant flow within the radiator system of select BMW vehicles. Made from EPDM (ethylene propylene diene monomer), this hose offers excellent resistance to heat, ozone, and coolant chemicals, which helps prevent premature wear and cracking. Both ends of the hose have an inside diameter of 1 19/32 inches, ensuring a secure and leak-free connection to the radiator and engine fittings. The hose is a single inside diameter type without additional heat shields or protective sleeves, designed to fit the specific routing requirements of BMW 3 Series and Z3 models. Compliance with SAE J20R4 Class D-1 and SAE J1684 Type EC standards confirms its suitability for automotive coolant applications.

About the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose product line focuses on providing hoses with precise bends and shapes to match the original equipment manufacturer (OEM) specifications. This ensures proper coolant flow and fitment without the need for modifications. The 71664 part number is part of this line, offering a tailored solution for BMW vehicles that require a curved hose to navigate engine bay constraints effectively.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses
• Resolving coolant leaks caused by hose degradation
• Maintaining proper coolant circulation to prevent engine overheating
• Ensuring secure hose connections with correct diameter fittings
• Addressing fitment issues in BMW 3 Series and Z3 cooling systems

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71664, ensure the engine is cool to avoid burns from hot coolant. Verify that the hose ends match the radiator and engine inlet diameters of 1 19/32 inches. Use appropriate clamps to secure the hose and check for any kinks or twists that could restrict coolant flow. It is recommended to inspect adjacent hoses and components for wear during installation to maintain overall cooling system integrity.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71664 to meet stringent SAE specifications, ensuring durability and performance in demanding automotive environments. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability. Users should consult product documentation or authorized sources for warranty information.