Dayco 70887 Engine Coolant Bypass Hose

Overview of Dayco Curved Radiator Hose 70887

The Dayco Curved Radiator Hose 70887 is engineered for reliable engine coolant bypass in select BMW, Lincoln, and Mercedes-Benz models. Designed with durable EPDM material, this black single inside diameter hose ensures consistent performance under demanding conditions.

• Constructed from high-quality EPDM for heat and chemical resistance
• Black color with a trunk height of 6 1/4 inches
• Both ends have an inside diameter of 1 9/16 inches
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type for precise fitment

Detailed Product Description

The Dayco Curved Radiator Hose 70887 is part of the Curved Radiator Hose product line, designed specifically to provide a reliable coolant bypass solution. Made from EPDM, this hose offers excellent resistance to heat, ozone, and automotive fluids, making it suitable for engine cooling systems in vehicles such as the BMW 535i, Mercedes-Benz S500, and Lincoln Continental. The hose features a consistent inside diameter of 1 9/16 inches on both ends, ensuring a secure connection and optimal coolant flow. Its trunk height of 6 1/4 inches accommodates the specific routing requirements of the compatible vehicles.

Compatible Vehicles and Applications

This engine coolant bypass hose is compatible with a range of BMW, Lincoln, and Mercedes-Benz models, including but not limited to:

• BMW 400E, 528i, 530i, 535i, 635CSi, 735i, M5
• Lincoln Continental, Mark VII
• Mercedes-Benz 400SE, 500E, 500SEC, 500SL, S420, S500, SL500, CL500

It is designed to replace worn or damaged hoses that may cause coolant leaks, overheating, or reduced engine efficiency.

Common Issues Addressed by This Hose

• Coolant leaks due to cracked or deteriorated hoses
• Engine overheating caused by restricted coolant flow
• Loss of coolant pressure in the bypass system
• Hose collapse or deformation under heat stress
• Incompatibility with OEM specifications leading to premature failure

Installation Notes and Tips

• Ensure the engine is cool before removing the old hose
• Check hose clamps and replace if corroded or damaged
• Verify the hose routing matches OEM specifications for proper fit
• Inspect surrounding components for wear or damage during installation
• Use appropriate tools to avoid damaging the hose ends during installation

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70887 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring durability and performance in demanding automotive environments. While specific warranty details are not provided, Dayco products typically adhere to strict quality control processes to maintain reliability and fitment accuracy for BMW, Lincoln, and Mercedes-Benz vehicles.