Mercedes W169 W245 OM640 CDI Cylinder Head Valve Cover A6400102420

Mercedes W169 W245 OM640 CDI Cylinder Head Valve Cover is an original component from the Tappet and valve covers group, designed for OM640 power units in A-Class and B-Class models. It ensures a tight seal for the upper part of the engine, stabilizing the operation of the timing system and protecting the valve mechanism from contaminants.

Specifications and technical data

• SKU: A6400102420
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400102420
• Substitutable numbers: A6400102420, A 640 010 24 20, KZ
• Category: Rocker & Valve Covers

Purpose and technical function

The valve cover in the OM640 engine is responsible for isolating the working space of the tappets and valves from the engine compartment. It limits the ingress of dust, moisture, and vapors from the outside, while helping to maintain stable operating conditions for the timing components. Thanks to its factory geometry and fitment to the OM640 cylinder head, this component supports proper oil flow in the upper part of the engine and facilitates maintaining the proper tightness of the system.

Construction and fitment for the OM640 unit

The original valve cover for Mercedes W169 and W245 models is designed to precisely interface with the OM640 cylinder head and factory mounting points. The design provides for proper routing of mounting bolts, service channels, and support points, which minimizes the risk of deformation during installation. As a result, the proper flatness of the mating surface is maintained, which is crucial for tightness and reducing leaks in the upper part of the power unit.

Benefits of using an original cover

Using an original valve cover in the OM640 engine allows for maintaining the factory operating parameters of the power unit. Key advantages include:

• secure fitment to the cylinder head and standard mounting points,
• stable operating conditions for tappets and valves due to proper isolation from contaminants,
• reduced risk of leaks in the upper part of the engine,
• compliance with Mercedes factory service procedures.

For users of A-Class and B-Class models with the OM640 unit, this means more predictable operation and easier diagnostics of potential faults in the cylinder head area.

Product characteristics and service application

The valve cover from this offer comes from a Mercedes vehicle and is a component from the Tappet and valve covers group. It is suitable both for standard replacement of a damaged cover and for major service work within the OM640 cylinder head, such as timing system regeneration or sealing the upper part of the unit. Choosing an original component allows for maintaining the structural integrity of the entire system and facilitates installation without the need for additional modifications.

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

Technical support and knowledge development

When planning major service work, it is worth expanding your knowledge on the selection and regeneration of consumable parts. If you are interested in how to approach the purchase of used components and their refurbishment, the guide article Used rims like new: a guide to buying and refurbishing aluminum rims may be helpful, as it shows a practical approach to assessing the condition and cost-effectiveness of regenerating automotive parts.