Dayco 70859 Radiator Coolant Hose - Upper

Overview of Dayco Curved Radiator Hose 70859

The Dayco Curved Radiator Hose 70859 is designed to provide reliable coolant flow for a range of vehicles including Chevrolet, Ford, Lincoln, Mazda, and Mercury models. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance under typical engine operating conditions.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Black color with a curved design for precise fitment
• Both ends have a 1 1/2 inch inside diameter for uniform coolant flow
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Single inside diameter hose type with 19-inch trunk height

Detailed Product Description

The Dayco Curved Radiator Hose 70859 is part of the Curved Radiator Hose product line, which focuses on delivering hoses shaped to fit specific engine layouts and cooling system configurations. This hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for long-term use in automotive cooling systems. The hose features a consistent 1 1/2 inch inside diameter on both ends, ensuring proper coolant flow without restriction. Its black color and curved design allow for easy installation in tight engine compartments, particularly in vehicles such as the Chevrolet Bel Air, Ford Mustang, Lincoln Continental, Mazda RX-7, and Mercury Cougar.

Compatible Vehicles and Applications

This radiator coolant hose is compatible with several popular models, including:

• Chevrolet Bel Air and Impala
• Ford Mustang, Thunderbird, LTD
• Lincoln Continental, Grand Marquis, Marquis
• Mazda RX-7, Montego
• Mercury Cougar, Grand Marquis

It is designed to replace original equipment hoses that require a 1 1/2 inch inside diameter and a curved shape for proper fitment.

Common Issues Addressed by This Radiator Hose

• Coolant leaks caused by cracked or worn radiator hoses
• Overheating due to restricted or collapsed hoses
• Swelling or softening of hoses from heat exposure
• Improper fitment leading to coolant loss or hose detachment
• Degradation from exposure to engine chemicals and ozone

Installation Notes and Tips

• Ensure the engine is cool before removing the old hose to avoid burns
• Check hose clamps and replace if corroded or damaged
• Verify the hose routing matches the original to prevent kinks or interference
• Use proper tools to avoid damaging the hose during installation
• Inspect the cooling system for leaks after installation

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70859 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for coolant hoses. The EPDM material and construction provide durability and resistance to heat and chemicals commonly found in automotive cooling systems. Warranty details should be confirmed with the original equipment manufacturer or supplier, as they may vary.