Mercedes W207 W211 Engine Cylinder Head Rocker Cover Right O/S OM642 A6420101630

Mercedes W207 W211 Engine Cylinder Head Rocker Cover Right O/S OM642 is an original component from the Tappet and valve covers group, designed for the right side of the power unit. This used OEM part ensures factory-fit, sealing of the timing system, and stable operation of the OM642 engine in Mercedes W207 and W211 models.

Specifications and technical data

• SKU: A6420101630
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420101630
• Substitutable numbers: A6420101630, A 642 010 16 30
• Location on the vehicle: Right
• Part type: Valve Cover
• Category: Rocker & Valve Covers

Purpose and technical function

The engine rocker cover in OM642 units is responsible for covering the valve mechanism and tappets, as well as maintaining the proper sealing of the lubrication system. The right side of the cylinder head requires a component with precisely selected geometry to ensure correct oil routing, vapor control, and protection against contaminants from the engine bay.

In the case of diesel engines used in Mercedes W207 and W211 series, stable operation of the timing system has a direct impact on engine refinement, noise levels, and the durability of the power unit. Using an original rocker cover allows for maintaining the parameters specified by the manufacturer and reduces the risk of leaks or seepage.

Construction and fitment for the OM642 engine

The engine rocker cover on the right side is structurally adapted to the V6 OM642 architecture, taking into account oil channels, mounting points, and sockets for associated components. This allows for:

• maintaining proper oil flow in the upper part of the engine,
• secure mounting to the cylinder head without stress,
• proper sealing of the space above the valves and tappets,
• protection of the mechanism against dust, moisture, and external contaminants.

The original Mercedes origin facilitates trouble-free installation, without the need for modifications or adjustments to mounting holes. This is particularly important for components operating in the immediate vicinity of hot engine parts, where dimensional tolerances are of great importance.

Vehicle placement and installation aspects

The presented cover is intended for the right side of the power unit, which is crucial when selecting parts for a specific engine configuration. Proper placement on the vehicle affects:

• compatibility with the mounting system in the cylinder head,
• correct routing of cables and accessories in the engine bay,
• easier service access during inspections and repairs.

When replacing, it is recommended to use new seals and thoroughly clean the contact surface on the cylinder head to fully utilize the sealing potential offered by this rocker cover.

Characteristics of the used part

The item comes from disassembly and is offered as a used engine rocker cover. This type of OEM part is a beneficial solution for users who want to maintain the factory specification of the vehicle while optimizing repair costs. A used cover, provided it is in good technical condition, allows for continued engine operation without the need to resort to replacements with uncertain fitment.

Integration with the Mercedes engine system

The cover works with other components of the timing and lubrication system in the OM642 engine, creating a coherent system of protection and sealing for the upper part of the unit. A correctly selected element from the Tappet and valve covers group reduces the risk of contaminants entering the engine and helps maintain stable operating conditions under various loads.

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 additional covers, shields, or elements securing the valve mechanism, check the available parts in the Mercedes Tappet and valve covers category.

Additional technical support

For larger service projects, also involving the drivetrain and transmission, guide materials regarding the selection of components based on driving style and vehicle characteristics may be helpful. In such a case, it is worth reading the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which practically discusses the issues of compatibility and operation of used components.