Cylinder Head Cover Mercedes W204 W906 OM651.955 Diesel Engine A6510100830

Cylinder Head Cover Mercedes W204 W906 OM651.955 Diesel Engine is an original timing system component designed for diesel engines, ensuring a tight seal for the cylinder head and stable operation of the power unit. The cover was designed by Mercedes for a precise fit to the specific engine configuration, which facilitates maintenance and reduces the risk of leaks. This used component allows for an economical yet technically correct repair without the need for more expensive replacements.

Specifications and technical data

• SKU: A6510100830
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510100830
• Substitutable numbers: A6510100830, A 651 010 08 30, KZ
• Fuel type: Diesel
• Category: Cylinder Heads

Purpose and technical function

The valve cover in a diesel engine plays a key role in sealing the upper part of the power unit. It is responsible for:

• separating the timing chamber from the environment and keeping oil in the internal circulation,
• stable operation of the components located in the upper part of the cylinder head,
• protecting mechanisms against external contaminants.

Thanks to its design tailored to the OM651.955 diesel engine, the cover works in harmony with the lubrication and ventilation system, which is important for the durability of the entire cylinder head assembly.

Benefits of using an original valve cover

Using an original valve cover in W204 and W906 series vehicles allows for maintaining the factory operating parameters of the power unit. The most important advantages include:

• precise fit with the cylinder head – reduces the risk of oil leaks and sealing problems,
• compatibility with factory diesel engine equipment,
• maintaining the structural rigidity of the cylinder head area as specified by the manufacturer,
• easier diagnostics and future maintenance thanks to the use of a component compliant with technical documentation.

Choosing a used, original component is a reasonable solution for repairs where both technical correctness and cost control are important.

Condition of the component and application in a diesel engine

The offered cover comes from the Cylinder Heads category, which emphasizes its direct connection to the upper part of the engine and the valve system. The component is intended for Diesel-powered units, where proper management of temperature, pressure, and lubrication in the cylinder head area is required.

The used component allows for restoring proper sealing and installation geometry in the event of damage to the existing cover, e.g., after overheating, cracking, or deformation. By maintaining the original design, it is possible to maintain stable engine operating conditions over a long period of use.

Selection and integration with the cylinder head system

When selecting a valve cover for a specific vehicle, it is important to match it to the engine version and equipment configuration. The original component dedicated to the OM651.955 unit facilitates:

• correct positioning of the cover gasket,
• proper routing of oil and ventilation channels,
• trouble-free installation in place of the factory cover without modifications.

This solution is particularly beneficial in vehicles used intensively, where the stability of the diesel engine and the reduction of leaks have a direct impact on reliability and service costs.

Expanding the scope of repairs in the cylinder head area

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as housings, covers, or mounting elements, check the available parts in the Mercedes Cylinder Heads category.

For users interested in a broader approach to modifications and service of power units, including a comparison of factory and tuning solutions, an article describing the practical aspects of installing a sports exhaust system may be helpful – you can find it here: Second-hand Mini John Cooper Works Pro sports exhaust – a legal way to get a racy sound and +7 HP.