Mercedes W204 W207 W212 OM642 3.0 CDI Cylinder Head Bolt Set x8 A0039902522

Mercedes W204 W207 W212 OM642 3.0 CDI Cylinder Head Bolt Set x8 is a set designed for the professional installation of the cylinder head in OM642 3.0 CDI diesel engines used in C-Class, E-Class models, and other vehicles in this series. Properly selected cylinder head bolts ensure stable, uniform clamping of components, which is crucial for the tightness of the combustion chamber and the durability of the entire system. This solution is dedicated to users who expect a precise fit for Mercedes power units.

Specifications and technical data

• SKU: A0039902522
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0039902522
• Substitutable numbers: A0039902522, A 003 990 25 22
• Part type: Cylinder Head
• Category: Cylinder Heads

Purpose and compatibility

The presented cylinder head bolt set has been designed for the OM642 3.0 CDI engine installed in popular Mercedes W204, W207, and W212 models. Using a dedicated set within the cylinder head minimizes the risk of deformation, leaks, and problems with maintaining proper cylinder pressure. The x8 set allows for consistent assembly during a single service operation, which is particularly important for comprehensive engine maintenance.

Technical characteristics of the set

The cylinder head bolt set belongs to the Cylinder Heads category, which clearly defines its application within the engine structure. The bolts operate in a zone of high thermal and mechanical stress, which is why their proper selection is key to maintaining the stability of the connection between the block and the head. Using a uniform set during a single repair facilitates the control of tightening torque and the repeatability of assembly parameters.

Application in the repair process

Replacing cylinder head bolts is recommended whenever there is any interference with the head gasket or when removing the cylinder head in an OM642 3.0 CDI engine. Using a complete set:

• reduces the risk of the system losing its seal again after a short mileage,
• makes it easier to maintain the correct tightening sequence and values,
• supports uniform distribution of forces across the entire contact surface between the head and the block. For workshops and users servicing their vehicles independently, this is a practical solution that organizes the assembly process and reduces the number of variables affecting the final repair result.

Product condition and benefits of choosing

The offered cylinder head bolt set is in used condition, which allows for an economical approach to repairs while maintaining the original origin of the components. For many Mercedes users, it is important to use components that comply with factory specifications in critical engine areas, which promotes predictable engine behavior after service. Choosing such a set can be particularly beneficial for renovation projects and for rebuilding vehicles used on a daily basis.

Expanding the scope of service work

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 additional bolts, fasteners, or accessories related to cylinder head assembly, check out the available parts in the Mercedes Cylinder Heads category. For larger repair projects or rebuilding a car based on used components, it is worth planning the entire work in advance – practical tips on selecting original elements, the scope of work possible to perform in a garage, and safe tuning can be found in the article Garage project – how to rebuild your daily driver cheaply using proven salvaged parts.