MERCEDES BENZ 646 REFURBISHED ENGINE
€3100.00
Refurbished engines offered at our company undergo a meticulous restoration process, ensuring they meet high-quality standards and performance expectations. These engines have been disassembled, inspected, and repaired to like-new condition, with any worn or faulty components replaced. Our refurbishment process combines expertise and precision to bring these engines back to optimal functionality.
By choosing a refurbished engine from our e-shop, customers benefit from cost savings compared to purchasing a brand-new engine, making it a budget-friendly and environmentally sustainable choice. Each refurbished engine is thoroughly tested to guarantee reliability and efficiency, providing customers with a dependable and high-performing option for their automotive needs.
Explore our selection of refurbished engines, and experience the perfect balance of affordability, reliability, and eco-consciousness for your vehicle
The 646986 engine is a diesel engine produced by Mercedes-Benz. It belongs to the OM646 family of engines, which have been used in various Mercedes-Benz models:
Mercedes C-Class W203 from 2003 to 2007 and W204 from 2007 to 2009
Mercedes CLC-Class C203 from 2008 to 2010
Mercedes CLK-Class C209 from 2005 to 2009
Mercedes E-Class W211 from 2002 to 2009
Mercedes Sprinter W906 from 2006 to 2009, and Sprinter Classic starting in 2013
Mercedes V-Class W639 from 2003 to 2010
*buying the refurbished engine, old engine core need to be returned
The 2.2-liter inline diesel engine, known as the Mercedes OM646, was produced between 2002 and 2010. This engine was utilized across various Mercedes-Benz models, including the C-Class, CLK-Class, and E-Class, as well as the Vito and Sprinter minibuses. Additionally, a transverse variant of this diesel engine, the OM644, was developed specifically for the Chrysler PT Cruiser.
Evolution from OM611 to OM646
The OM646 engine emerged in 2002 as an evolution of the earlier OM611 4-cylinder diesel engine. While the overall design of the engine remained largely similar—retaining features such as the cast-iron cylinder block, a two-row timing chain, and an aluminum 16-valve cylinder head with hydraulic compensators—several key upgrades were introduced.
Key Features and Innovations
Fuel System: The OM646 was equipped with a more advanced Bosch Common Rail fuel system featuring a CP3 pump and 7-hole solenoid injectors capable of generating an injection pressure of 1600 bar. This system improved fuel atomization and included two pilot injections, helping to lower combustion chamber temperatures, thereby reducing NOx emissions. The engine also benefitted from smoother operation, with reduced noise and vibration levels.
Intake and Turbocharging: The engine featured an electronically controlled swirl flaps (EKAS) intake manifold and an advanced Garrett GTA1852VK turbocharger with variable geometry and an electric drive. For passenger car versions, Lanchester-type balance shafts were included to further enhance smoothness.
EGR and Emissions: The pneumatic EGR valve from previous designs was replaced with an electronically controlled valve, improving the engine's emissions performance.
2006 OM646 EVO Upgrade
In 2006, the OM646 underwent significant updates, resulting in the OM646 EVO version, which featured 90 newly replaced parts:
Compression Ratio: The compression ratio was reduced from 18.0 to 17.5, with the use of higher pistons and shorter connecting rods.
Turbocharging and Cooling: A new, modified turbocharger and an upgraded intercooling heat exchanger were introduced. The cylinder head was redesigned for better cooling efficiency, and ceramic glow plugs were added to improve cold starts.
Bi-Turbo Modification: For the Sprinter, a bi-turbo version was created, incorporating a pair of BorgWarner turbochargers.
Environmental Compliance and Final Enhancements
One of the primary objectives of the OM646 EVO was to meet the Euro-5 environmental standards. To achieve this, several updates were made:
EGR Valve: The EGR valve was replaced with a more efficient model.
DPF and Catalyst: A new Diesel Particulate Filter (DPF) and catalyst were installed.
Intercooler Size: The size of the intercooler heat exchanger was increased for better cooling efficiency.
Updated Regulators: All pressure and temperature regulators were modernized to enhance performance and environmental compliance.
The OM646 engine, especially in its EVO form, represents a significant step forward in diesel engine technology, balancing power, efficiency, and environmental responsibility.