Dayco 71791 Engine Coolant Bypass Hose

Durable Engine Coolant Bypass Hose for Mercedes-Benz Vehicles

The Dayco Curved Radiator Hose 71791 is designed to provide reliable coolant flow for select Mercedes-Benz models. Engineered with EPDM material, this black engine coolant bypass hose ensures consistent performance under demanding conditions.

• Constructed from durable EPDM material for heat and chemical resistance
• Black single inside diameter hose with 1 13/32 inch diameter on both ends
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 6 1/2 inches for precise fitment
• Compatible with multiple Mercedes-Benz models including 300CE, 300E, 300SE, 300TE, C36 AMG, C280, E320, S320, and SL320

About the Dayco Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco focuses on delivering hoses designed to accommodate specific engine layouts requiring curved configurations. This product line emphasizes durability and compliance with SAE standards, ensuring proper coolant bypass flow and fitment for vehicles like the Mercedes-Benz 300 series and AMG variants. The 71791 hose is part of this line, providing a tailored solution for engine coolant routing without the need for additional modifications.

Product Details and Specifications

The Dayco 71791 engine coolant bypass hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1 13/32 inches, designed as a single inside diameter hose to maintain consistent coolant flow. The hose does not include a heat shield or protective sleeve, which is typical for this type of bypass hose. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for coolant hoses. The trunk height of 6 1/2 inches supports proper installation and fitment within the engine bay of compatible Mercedes-Benz models.

Common Applications and Problem Solving

• Replacement of worn or cracked engine coolant bypass hoses in Mercedes-Benz 300CE, 300E, 300SE, and related models
• Addressing coolant leaks caused by hose degradation or damage
• Restoring proper coolant circulation to prevent engine overheating
• Resolving fitment issues with original equipment hoses that have become brittle or misshapen
• Maintaining engine cooling system integrity in performance models like the C36 AMG

Installation Notes and Tips

Ensure the engine is cool before removing the old hose to avoid burns. Inspect hose clamps and surrounding components for wear and replace if necessary. Confirm the hose orientation matches the original routing to prevent kinks or restrictions. Lubricate hose ends with a small amount of coolant or water to ease installation. Verify that the hose is seated fully on the fittings and clamps are securely tightened to prevent leaks.

Quality Assurance and Warranty

Dayco manufactures the 71791 hose to meet strict SAE specifications, ensuring durability and performance. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability. Using this hose helps maintain the integrity of the cooling system in compatible Mercedes-Benz vehicles.