Mercedes W639 W906 Diesel OM651 Engine Cover Head Rocker Panel A6510100230

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W639 W906 Diesel OM651 Engine Cover Head Rocker Panel is a factory timing system component designed for OM651 diesel engines used in Mercedes commercial models. As part of the Tappet and valve covers group, it ensures a tight seal for the cylinder head and stable operation of the valve mechanism in diesel-powered units. Using this OEM component allows for a technically correct replacement of a worn cover without interfering with the engine's construction.

Specifications and technical data

• SKU: A6510100230-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510100230
• Substitutable numbers: A6510100230, A 651 010 02 30
• Fuel type: Diesel
• Category: Rocker & Valve Covers

Purpose and function in the OM651 engine

The valve cover in the OM651 engine is responsible for separating the timing workspace from the environment and maintaining proper operating conditions for the tappets and valves. In diesel units, this is particularly important for lubrication stability, leak control, and preventing contaminants from entering the cylinder head. Using an original cover dedicated to the Mercedes W639 and W906 allows for maintaining factory fit tolerances and correct sealing geometry.

Construction and fitment for the valve system

The valve cover from this series has been designed as an integral part of the cylinder head assembly in the OM651 engine. The design provides precise guidance over the tappets and valves, which facilitates maintaining proper oil pressure and improves the engine's operating culture. Thanks to the preservation of the original mounting geometry and contact surfaces, installation in a Mercedes W639 or W906 does not require modifications or adaptations, and the entire assembly works with the factory ventilation and lubrication system.

Benefits of using an original valve cover

Using a used, original valve cover to replace a damaged component allows for restoring the proper tightness of the upper part of the engine and reducing the risk of oil leaks in the cylinder head area. For diesel units, it is also essential to maintain cleanliness inside the valve system, which translates into stable tappet operation and longer service life of the timing components. Choosing a component from the Tappet and valve covers group dedicated to a specific engine family also facilitates diagnostics and subsequent service.

Professional use in service and refurbishment

The valve cover designed for the Mercedes W639 and W906 is suitable both for standard replacement of a damaged element and during more extensive service work in the cylinder head area. It can be used in workshops specializing in servicing OM651 units, in refurbishment processes, and for fleet repairs of commercial vehicles. Using an OEM component allows for optimizing repair costs while maintaining proper fitment to the factory engine design.

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 covers, seals, or mounting elements, check the available parts in the Mercedes Tappet and valve covers category.

For users interested in deepening their knowledge about the selection and installation of engine accessories, including turbochargers and charge air cooling systems, the Global Parts technical guide may be helpful – BMW B58 code, or 340 HP from the secondary market – a checklist before buying a turbocharger and intercooler for the BMW 3 Series (G20), which shows how to approach the verification of compatibility and condition of components before installation step by step.