Dayco 71438 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 71438

The Dayco Curved Radiator Hose 71438 is designed specifically for BMW 325i, 325is, and 325iX models. Engineered with durable EPDM material, this dual inside diameter hose ensures reliable coolant flow and heat resistance for your vehicle's cooling system.

• Constructed from high-quality EPDM material for durability and heat resistance
• Dual inside diameter hose with 1 7/16 inch and 1 1/2 inch ends for precise fitment
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 13 1/4 inches for proper routing in engine bay

Detailed Product Description

The Dayco Curved Radiator Hose 71438 is a radiator coolant hose designed to meet the specific cooling requirements of BMW 325i, 325is, and 325iX vehicles. Made from EPDM (ethylene propylene diene monomer) rubber, this hose offers excellent resistance to heat, ozone, and coolant chemicals, ensuring long-lasting performance. The dual inside diameter design features one end measuring 1 7/16 inches and the other 1 1/2 inches, allowing for a secure and precise connection to the radiator and engine components. This hose does not include a heat shield or protective sleeve, focusing on a straightforward, OEM-style replacement. It meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant systems.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line is engineered to provide reliable coolant flow with precise bends that match OEM specifications. This product line focuses on delivering hoses that maintain proper coolant circulation while fitting the unique routing requirements of specific vehicle models. The 71438 part is part of this line, offering a tailored fit for BMW 3 Series models, ensuring compatibility and performance without modification.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses in BMW 325i, 325is, and 325iX
• Prevention of coolant leaks caused by hose degradation
• Restoration of proper coolant flow to avoid engine overheating
• Addressing hose swelling or softening due to heat exposure
• Ensuring secure connections with dual inside diameter ends for leak-free operation

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71438, ensure the engine is cool to prevent burns or injury. Verify the hose orientation matches the original routing to avoid kinks or stress points. Use appropriate clamps to secure both ends firmly, matching the 1 7/16 inch and 1 1/2 inch inside diameters. Inspect adjacent components for wear or damage during installation to maintain overall cooling system integrity.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71438 to meet stringent SAE specifications, including J20R4 Class D-1 and J1684 Type EC, ensuring compliance with industry standards for coolant hoses. While specific warranty details are not provided, Dayco products typically undergo rigorous quality control to deliver reliable performance in automotive cooling applications.