Ford Focus St-2 Mk2 Crankcase Breather Bleeding Hose Tube Pipe Line 8670008

Ford Focus St-2 Mk2 Crankcase Breather Bleeding Hose Tube Pipe Line is a component from the Lines, Hoses and Pipes group, responsible for the proper discharge of vapors from the crankcase in the power unit. A properly selected hose ensures stable operation of the breather system, reduces the risk of leaks, and helps maintain uniform pressure in the engine, which translates into smoother operation and predictable performance.

Specifications and technical data

• SKU: 8670008
• Mark: Ford
• Condition: Used
• OEM Part Number: 8670008
• Substitutable numbers: 8670008
• Category: Hoses, Lines & Pipes

Purpose and function of the breather hose

The described breather hose is designed for use in the sports version of the second-generation Ford Focus ST-2. Its task is the controlled discharge of oil vapors and gases from the crankcase into the intake system, which allows for maintaining proper engine operating parameters and reducing contamination of the engine compartment.

A well-selected breather hose:

• stabilizes pressure in the crankcase,
• limits blow-by and uncontrolled oil leaks,
• supports smooth operation of the power unit under load,
• reduces the risk of deposit formation in the breather area.

Technical characteristics and product group

The element belongs to the Lines, Hoses and Pipes group, which means it has been designed to work in an environment exposed to temperature changes, contact with oil vapors, and vibrations generated by the engine. The design of the hose is adapted to the specific routing in the engine compartment of the Focus ST-2 Mk2, thanks to which it maintains the appropriate geometry and does not interfere with other components.

As an original Ford part, the hose maintains factory flow characteristics and fitment to the connectors and mounts in the given model. This is especially important in high-performance units, where an incorrect cross-section or length of the hose can affect the operation of the breather system.

Product condition and service application

The hose is offered as a used part, which allows for an economical replacement of the element in a situation where the existing hose has worn out, hardened, cracked, or developed a leak. Such components are often replaced preventively during service work related to the breather system, intake cleaning, or during major engine repairs.

In practice, installing the breather hose in a Focus ST-2 Mk2 is a service task of moderate difficulty, however, it requires maintaining the tightness of connections and proper positioning of the hose relative to other elements in the engine compartment. A properly selected and installed hose helps reduce problems such as unstable idle speed, excessive oiling of the intake, or an unpleasant smell of vapors around the engine.

Benefits of using an original Ford hose

Using a breather hose dedicated to the Ford Focus ST-2 Mk2 brings several practical benefits:

• Factory fitment – maintaining the original geometry and connection diameters facilitates installation and minimizes the risk of leaks.
• Compatibility with the breather system – the hose works with factory system components, which promotes stable engine operation across the full rev range.
• Safe operation – a sealed breather system limits the escape of vapors into the engine compartment and helps keep the equipment clean.

For users of the ST-2 version, where the engine often operates under higher loads, maintaining a functional breather hose is important from the point of view of power unit durability and performance repeatability.

System expansion and related parts

If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other elements from the same group, such as additional vacuum lines, cooling system hoses, or breather pipes, check the available parts in the Ford Lines, Hoses and Pipes category.

For drivers interested in comparing technical solutions used in various brands and sports versions, including models with increased power and a modified intake system, an article discussing structural differences in RS series engines and chassis may be helpful – more information can be found in the material Audi RS vs other models – what is hidden under the hood and chassis?.