Mercedes W204 W207 W212 Crankshaft OM651 Diesel Engine Crank Shaft A6510301901

Mercedes W204 W207 W212 Crankshaft OM651 Diesel Engine Crank Shaft is a factory-original component of the crank-piston system designed for the OM651 series diesel engines used in popular Mercedes C-Class, E-Class, and CLK models. This component from the Crankshafts category ensures precise transfer of forces from the pistons to the drivetrain, which is crucial for engine refinement and durability. Using an OEM component is a sensible choice for professional repairs where structural compatibility and stable engine performance are paramount.

Specifications and technical data

• SKU: A6510301901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510301901
• Substitutable numbers: A6510301901, A 651 030 19 01
• Fuel type: Diesel
• Category: Crankshafts

Purpose and technical characteristics

The presented crankshaft is dedicated to OM651 diesel engines installed in Mercedes W204, W207, and W212 series vehicles. The crankshaft design has been engineered to withstand the high loads characteristic of modern diesel units, where both high torque and long-term fatigue resistance of the material are essential.

The geometry of the main and connecting rod journals, as well as the layout of the oil channels, are optimized for uniform lubrication and reduction of torsional vibrations. As a result, the crankshaft works correctly with the factory lubrication system, connecting rods, and pistons, which translates into stable engine operation across the entire rev range.

Benefits of using an original crankshaft

Using an original crankshaft in an OM651 diesel engine allows you to maintain the factory performance parameters of the power unit. The most important advantages include:

• High dimensional compatibility with the engine block and main bearings, which facilitates correct crankshaft alignment.
• Properly selected stiffness and mass, supporting smooth operation in both low and high rev ranges.
• Compatibility with the factory flywheel, pulley, and vibration damping system.
• Ability to use existing reference points for precise timing setup and synchronization with engine accessories.

For workshops specializing in Mercedes diesel engine repairs, using such a component means a predictable assembly process and a lower risk of issues with balancing or leaks in the lubrication system.

Application in the OM651 diesel engine

OM651 diesel engines are designed for high mileage and intensive use, which is why the crankshaft must withstand significant loads while maintaining adequate stiffness. The presented component works with the piston-crank system, turbocharger, and fuel injection system, ensuring:

• stable torque transfer to the transmission,
• proper cooperation with the diesel engine lubrication system,
• maintenance of the correct crankshaft geometry relative to the block and bearings.

By maintaining the factory crankshaft design, it is possible to restore the original performance parameters of the power unit after an overhaul or replacement of a damaged component.

Condition and assembly aspects

The crankshaft is offered as a used original component, which in practice means a favorable combination of price and adherence to factory specifications. Before installation, a standard workshop procedure is recommended, including inspection of the journal surfaces, checking bearing clearances, and verifying balance in accordance with the vehicle manufacturer's procedures.

When replacing the crankshaft in an OM651 engine, it is also worth paying attention to the condition of the main and connecting rod bearings, seals, and mating components to ensure the repair is durable and economically justified. This approach limits the risk of needing to intervene in the engine again in the near future.

Mercedes crankshafts – expansion and modernization of the crank system

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as other shafts, components mating with journals, or crank-piston system parts, check out the available parts in the Mercedes crankshafts category.

Technical support and expertise

When performing advanced work on the drivetrain and transmission, it is worth using reliable sources of knowledge. For a better understanding of the relationship between drive parameters, gear ratios, and driving characteristics, you can refer to the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, which practically discusses component selection and their impact on vehicle behavior.

Summary

Mercedes W204 W207 W212 Crankshaft OM651 Diesel Engine Crank Shaft is a solution intended for users and workshops that expect compliance with the factory design and predictable engine performance. Choosing an original, used crankshaft allows for a professional repair of the OM651 diesel engine while maintaining proper geometry, compatibility with accessories, and stable operation over a long service life.