Mercedes W222 Diesel OM656 Engine Breather Valve Oil Separator A6560101001

Mercedes W222 Diesel OM656 Engine Breather Valve Oil Separator is a specialized component of the crankcase ventilation system, designed for OM656 diesel units. It is responsible for the controlled discharge of oil vapors from the diesel engine, which supports stable engine operation and reduces intake contamination. Thanks to its design tailored to the specific engine generation, it provides a reliable service solution for repairs and upgrades of the breather system.

Specifications and technical data

• SKU: A6560101001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6560101001
• Substitutable numbers: A6560101001, A 656 010 10 01
• Fuel type: Diesel
• Category: Vacuum Pumps

Purpose and technical function

The presented breather hose is a component of the crankcase ventilation system in the OM656 diesel engine, used in W204 and W222 class models. Its task is to direct blow-by gases and oil vapors from inside the engine for further processing in the intake system, which helps maintain proper pressure in the crankcase and reduce oil losses.

A properly selected breather hose in a diesel engine:

• stabilizes the operating conditions of the engine under various loads,
• reduces the risk of oil leaks caused by overpressure in the crankcase,
• limits the accumulation of contaminants in the intake system,
• supports the uniform operation of the lubrication system in the long term.

Benefits of using an original breather hose

In the case of modern diesel engines, such as the OM656, the geometry and diameters of the breather hoses are precisely matched to the gas flow characteristics. Using the correct hose:

• ensures proper fit to the connectors and mounts in the engine bay,
• minimizes the risk of leaks at the connections,
• maintains the oil vapor flow path designed by the manufacturer,
• allows for the preservation of the factory operating parameters of the ventilation system.

For diesel engines, the hose's resistance to temperature, pressure pulsations, and contact with oil mist is particularly important. The correct breather hose helps reduce the formation of deposits in the intake manifold and cooperating components, which translates into more predictable operation.

Operational characteristics and installation

The offered item comes from the Vacuum pumps group, but in practice, it acts as a hose in the engine breather system. This is a used part, which in the case of original factory-fitted components often means maintaining the original geometry and compatibility with factory brackets and routing in the engine bay.

When replacing the breather hose in an OM656 unit, it is worth paying attention to:

• the condition of the connection ports on the engine and cooperating components,
• proper routing of the hose according to the factory path,
• the absence of twists and kinks that could restrict gas flow,
• the tightness of connections after the first engine start.

Selecting parts according to the vehicle manufacturer's markings and the engine unit helps reduce the risk of installation problems and ensures consistency with other system components.

Technical support and selection by part numbers

In the case of diesel engine-related components, such as breather hoses, it is crucial to match them to the specific engine version and vehicle year. It is worth using manufacturer markings and reference numbers to avoid dimensional discrepancies or differences in the shape of the connectors.

If you want to better understand the relationships between the fuel system and diesel engine operation, selecting parts by OEM numbers, and operating principles, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips on diagnostics and component selection in diesel engines there.

Related elements from the same group

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as vacuum lines, connectors, or components cooperating with the breather system, check the available parts in the Mercedes Vacuum pumps category.

Summary

Mercedes W222 Diesel OM656 Engine Breather Valve Oil Separator is a functional component of the crankcase ventilation system in a diesel engine, designed with the specifics of the OM656 unit in mind. Proper selection and correct installation of this hose support stable engine operation, reduce the risk of leaks, and help maintain proper conditions in the intake system. This is a practical service solution for users who want to restore the correct operation of the breather system in their Mercedes with a diesel engine.