Ford Fiesta Mk7 Oil Separator Assembly Crankcase Emission Control 6M5G-6A785-AB

Ford Fiesta Mk7 Oil Separator Assembly Crankcase Emission Control is a component of the crankcase ventilation system, classified under the Oil coolers and lines group. It is responsible for efficiently separating oil mist from gases before they return to the intake, which promotes stable engine operation and reduces contamination of the intake system. Using an original Ford component is a sensible choice when servicing the crankcase ventilation system in a Fiesta Mk7.

Specifications and technical data

• SKU: 1702154
• Mark: Ford
• Condition: Used
• OEM Part Number: 1702154
• Substitutable numbers: 1702154, 6M5G-6A785-AB, 6M5G6A785AB
• Part type: Oil Cooler
• Category: Engine Oil Coolers & Lines

Function of the oil separator in the crankcase ventilation system

The oil separator in the Ford Fiesta Mk7 plays a key role in controlling crankcase pressure and reducing the amount of oil entering the intake system. A properly functioning breather stabilizes engine operation, reduces the risk of leaks through seals, and decreases carbon deposit buildup in the manifold. In practice, an efficient separator:

• improves the discharge of gases from the crankcase,
• reduces oil consumption resulting from oil mist suction,
• supports smooth engine idling,
• decreases the load on the intake system and associated components.

Purpose and fitment

The oil separator in question has been designed for use in the Ford Fiesta Mk7, maintaining the geometry and connections specific to the factory ventilation system. The original Ford design ensures proper fitment with other system components, which facilitates installation and reduces the risk of leaks. By using a dedicated element from the Oil coolers and lines group, you can maintain compatibility with the factory lubrication and ventilation system design, without the need for modifications or the adaptation of universal replacements.

Benefits of using an original used component

Choosing a used, original Ford oil separator is often a beneficial compromise between cost and quality. A salvaged component retains the factory design and flow characteristics, which is important for engine stability and the proper operation of the ventilation system. The main advantages of this solution include:

• preservation of the original geometry of channels and separation chambers,
• compatibility with factory mounts and lines,
• the possibility of an economical repair of the ventilation system while maintaining OEM standards. Before installation, a standard visual inspection and verification of the condition of the ports and connections are recommended to ensure the tightness of the entire system after replacement.

Significance for the durability of the lubrication system

A functional oil separator has a direct impact on the operating conditions of the engine oil as well as the temperature and load of associated components. Reducing the amount of oil in the gases entering the intake promotes clean intake channels and stability of the fuel-air mixture, which translates into uniform combustion. You can find more about the impact of cooling and lubrication components on engine longevity in the article Engine cooling system – overheating, repair, and used radiators, where the relationships between engine operating temperature and component durability are discussed.

Complementary Ford lubrication system components

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 oil lines, oil cooling elements, or additional lubrication system components, check the available parts in the Ford oil coolers and lines category. When deciding between refurbishment and purchasing a used component, the guide Refurbished or original used – which part to choose for repairs? may also be helpful, as it discusses the practical aspects of selecting salvaged parts in the context of cost-effectiveness and durability.