Ford Focus Mk3 Heater Matrix Water Coolant Hose Line Pipe CV61-18K579-WD

The Ford Focus Mk3 Heater Hose is an original cooling system component designed for diesel engines. It ensures stable coolant flow to the heater, which translates to efficient cabin heating and proper operation of the entire system.

Specifications and technical data

• SKU: RHD-CV61-18K579-WD
• Mark: Ford
• Condition: Used
• OEM Part Number: CV61-18K579-WD
• Substitutable numbers: CV61-18K579-WD, CV6118K579WD, 1890797
• Fuel type: Diesel
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This hose belongs to the Cooling System Hoses and Pipes category and is specifically designed for diesel vehicles. It is responsible for the stable flow of coolant between the engine and the heater, which is crucial for maintaining the engine's optimal temperature and cabin comfort.

Thanks to its factory-specified geometry and connection diameters, the hose ensures:

• correct cooling system pressure, without undesirable constrictions or kinks,
• adequate cabin heating performance during cold starts and under high load,
• compatibility with factory wiring harnesses and accessories routing in the engine bay.

Construction and Fit for Ford Focus Mk3

The heater hose has been developed by the vehicle manufacturer, guaranteeing compatibility with the original Ford cooling system. Its shape, length, and connection placement are tailored to the engine bay architecture of the Focus Mk3 model with a diesel engine.

This precise fit results in:

• easier installation without the need for modifications or adapting universal hoses,
• secure seating on the heater and engine spigots, minimizing the risk of leaks,
• proper hose routing away from high-temperature components and moving parts.

Benefits of Using an Original Cooling Hose

Using an original hose in a diesel cooling system allows for maintaining the operating parameters intended by the vehicle manufacturer. In practice, this means:

• stable engine operating temperature across a wide range of loads,
• reduced risk of overheating due to leaks or improper fluid flow,
• better cooperation with other cooling system components, such as the radiator, thermostat, and water pump.

This solution is particularly beneficial for users who expect predictable vehicle performance in daily use, without unexpected cooling system failures.

Component Condition and Practical Application

The offered hose is a used part, intended for users seeking a tested, original component at a reasonable price. Such parts are excellent replacements for worn or leaking hoses that can cause coolant loss, air in the system, or reduced heating efficiency.

When replacing the hose, it is recommended to simultaneously check the condition of other hoses and the quality of the coolant to fully utilize the potential of the newly installed component and maintain even cooling of the diesel engine.

Cooling System and High-Temperature Operation

A functional heater hose is particularly important during the summer, when the cooling system operates under increased load. If you want to better understand how high ambient temperatures affect the entire cooling system and how to reasonably use used components, check out the guide Summer Heat vs. Cooling System – How Used Cooling System Components Aid in Economical Operation.

Other Ford Cooling System Hoses and Pipes

If you are also looking for other cooling system hoses and pipes for Ford, check out our dedicated offer: Ford Cooling System Hoses and Pipes. This will allow you to easily assemble a complete set of components responsible for coolant circulation in your car.