Mercedes W204 W212 Air Intake Hose Suction Pipe Tube Diesel OM642 A6420160881

The Mercedes W204 Crankcase Ventilation Hose OM642 is a component from the Hoses, Tubes, and Pipes category, designed for the crankcase ventilation system in diesel engines. A properly selected crankcase ventilation hose ensures stable engine operation, reduces blow-by, and helps maintain correct combustion parameters in a diesel engine.

Specifications and technical data

• SKU: A6420160881
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420160881
• Substitutable numbers: A6420160881, A 642 016 08 81
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Application in OM642 Engine

The crankcase ventilation hose in the Mercedes W204 model is responsible for the controlled discharge of gases from the crankcase into the intake system. In a Diesel engine, this is particularly important for:

• maintaining stable crankcase pressure,
• reducing oil leaks and oil mist,
• minimizing deposits in the intake manifold,
• maintaining smooth engine operation under various loads.

A functional crankcase ventilation hose supports the proper operation of the turbocharger, EGR system, and particulate filter, which directly impacts engine smoothness and durability.

Technical Characteristics and Construction

The crankcase ventilation hose in this configuration is specifically designed for the engine bay geometry of the W204, ensuring proper routing and no interference with other components. The hose's construction is adapted for operation in the oil and exhaust environment typical of diesel engines, considering:

• resistance to elevated temperatures in the engine bay,
• contact with oil and fuel vapors,
• adequate flexibility to compensate for engine vibrations,
• a sealed connection to intake system components and the valve cover.

Thanks to its adaptation to the specific fuel type, which is Diesel, the hose retains its properties during long-term use, reducing the risk of cracks and leaks typical of unsuitable aftermarket parts.

Condition, Origin, and Benefits of Use

The offered crankcase ventilation hose is an original Mercedes brand part in used condition, allowing for a reasonable cost while maintaining factory fit. Choosing an original hose from this series offers:

• certainty of the correct hose shape and length,
• compatibility with mounting points and connectors in the OM642 engine,
• reduced risk of installation errors resulting from imprecise aftermarket parts.

Using the correct crankcase ventilation hose helps reduce oil consumption, limit exhaust smoke, and improve engine stability, especially at higher mileages typical for diesel-powered vehicles.

Crankcase Ventilation Hose Selection and Installation

When selecting a crankcase ventilation hose for a W204 with an OM642 engine, it is crucial to match it to the specific engine version and intake system. In practice, this means paying attention to:

• compatibility with the valve cover and intake manifold design,
• the routing of hoses in the engine bay,
• the type of ancillary equipment used (e.g., different turbocharger variants).

Installing the crankcase ventilation hose is usually straightforward for an experienced mechanic – it involves removing old clamps, cleaning the connectors, and properly seating the new part. It is also a good opportunity to check the condition of other hoses from the Hoses, Tubes, and Pipes category in the engine bay to avoid further service downtime.

Other Mercedes Hoses, Tubes, and Pipes

If you are also looking for other components from the Hoses, Tubes, and Pipes category dedicated to this brand's vehicles, check out the Mercedes hoses, tubes, and pipes available in our assortment to find complete solutions for your intake, cooling, or ventilation system.

Practical Operational Tips

When replacing the crankcase ventilation hose in a diesel engine, it is worth paying attention to the typical symptoms of wear for this component, such as increased oiliness around the intake, unstable idle speed, or excessive smoke during acceleration. Regular inspection of the hoses' condition can reduce the risk of more serious malfunctions, such as intake system leaks or accelerated manifold contamination.

If you are modernizing or refreshing your car, including its visual appearance, information on restoring exterior elements may be useful – you can find it in the article Used Wheels Like New: A Guide to Buying and Refurbishing Alloy Wheels, which will help you comprehensively care for your car's appearance.