The engine was offered in five power variants. Which Mercedes-Benz Cars Had the OM646 Diesel Engine? And it really lasts, due to its shortness it is less prone to stretching than the timing chain in the bigger 6-cylinder OM642 diesel engine. The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. Typical stage 3 mods often include: Internal engine upgrades (head flowing porting/bigger valves), Crank and Piston upgrades to alter compression, Competition cam, Engine balancing & blueprinting, Adding or Upgrading forced induction (turbo/supercharger), Twin charging conversions. The diesel compression ratio was lowered from 18.0 to 17.5. And this doesnt go hand in hand with durability. Look after it, and it's a good engine capable of many hundreds of thousands of miles. OM617 engine 3. The item is your responsibility until it reaches us. Lets start with fuel injectors. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. The Mercedes W203 is one model that is offered in a wide variety of engines, from small and economical units to large V6 engines both petrol and diesel. Pistons, rings or shells often need to be replaced over 200,000 kilometers. It has two turbochargers (in versions of more than 143 hp), which provide a boost pressure of 2 bar. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. Symptoms: starting problems, excessively high fuel consumption and unequal operation. Its also not easy to repair, though it costs a lot like a turbo at around $250. Good for you, but don't buy anything untill watching this video. or 200 CDI . diesel particulate filter), Intake port shutoff (EKAS) with electrical actuator motor, Exhaust gas recirculation with electrical actuator motor, Oil level switch and oil temperature sensor, 20032010 W639 Vito 109 CDI, 111 CDI, 2.0 CDI, 20102013 Vito (Chinese market; known as OM646 980). Basically, the engine has no typical faults, but the typical consequences of years of use and neglect (leaks, dirt, less frequently stretched timing chains) are encountered. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. Hi there, I am Mladen and I am an auto enthusiast. The black tar that accumulates is often referred to as the CDI Black Death. A number of solutions included in the TwinPulse name are used. At an auto store, the same part can be purchased for $ 40. Jump To Article. Manufacturer Part Number 61-37200-10. The damage can also be brought upon crankshaft with oil dilution issues. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. Mercedes-Benz Sprinter (W906) repair manual. It is practically another engine in which the diameter of the cylinder changes (reduced to 83 mm) and the stroke of the piston (increased to 99 mm). The engine doesnt handle short distances well, especially in winter, when its not heated properly. Save my name, email, and website in this browser for the next time I comment. There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. Alternator pulley failure is accompanied by noise. The OM646 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. The engine was equipped with a Common Rail 2 fuel system. Ping us if you have anything cool to share on latest cars or on how to make older cars more efficient, or just want to say hi! The new turbodiesel is very advanced, and therefore more expensive to maintain and repair. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. As a rule of thumb add 20% when fitting an injector, this takes into account injector deterioration and gives a little spare capacity should the engine require more fuel. Glow plugs will need changing now and then. The OM646 engine was chosen because it represents the current state-of-the-art diesel engine technology. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Browse our daily deals for even more savings! The Fora platform includes forum software by XenForo. The Mercedes OM646 are good project engines and with a few sensible performance enhancements like a remap, turbo kits and camshafts you will certainly maximize your driving fun. In terms of issues, there were none that would occur frequently. When not working, a power drop occurs. Issues by Engine Type or Engine Name 2.1. I am interested in your opinion about the w211, 220cdi 170hp, means redesign, with a 646 engine, as they turned out, because I plan to buy it, and what to pay attention to when buying OM647 and OM648 Check crankshaft bearings for alignment. The more air you can get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. Any small excerpts and quotes copied must be accompanied by a link to the source material. Built with a streamlined idea in mind, so its smaller and loads more. On this Wikipedia the language links are at the top of the page across from the article title. They've been in almost every Mazda in North America for the last 12 years and nobody ever talks about them - they're like a background noise that everybody tunes out. We use cookies to ensure that we give you the best experience on our website. Tuning the Mercedes OM646 and best OM646 performance parts. The 2.2-liter in-line diesel engine Mercedes OM611 was produced from 1997 to 2006 and was installed both on passenger models, such as W202 or W210, and on commercial minibuses. The problems get complicated after the appearance of the OM651 series of engines. While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. More than 300,000 vehicles appear on the website. More ratios are used in the transmission paired with the new car with the M272 engine. The system is capricious. Check our guide on bad fuel injectors to learn more. Chassis Cab 4. The system is aired. We have this feature on twinchargers if you want to read more. The compression ratio is reduced to 16.2: 1. Here, careful verification is important. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, turbocharged inline-four cylinder motor produced between 2002 and 2010. and ceramic glow plugs for improved engine starts. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. Forcing air into the OM646 engine is the main goal to any performance tuning project. The original cost over $ 80. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. 2003 is a time for change. Tips for N54 Tuning The OM 646 is additionally equipped with a balance shaft and an electric fuel pump (instead of a mechanical one). Good proof is a machine called the 2.1 CDI OM651. We love hearing about our website visitors projects, especially the mods done and which work best for you on your car. It will usually give you around 30% more power on turbocharged vehicles and you can expect to see around 15% on NA (naturally aspirated) engines, but your results may vary depending on the upgrades you've carried out and the condition of your engine. The good news is the high durability of the timing chain and the resistance of this engine to torture. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. Sign up now!!! Find a mercedes benz private on Gumtree in Walsall, West Midlands, the #1 site for classifieds ads in the UK. Ignoring the issues with the OM651 CDIs more powerful 2.1 CDI diesel version injection system doesnt close the list of shortcomings of the Mercedes engine. Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. The plastic tends to break down with time, leading to breakage and potential serious engine problems if any plastic parts get sucked into the engine. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. Which helps us keep our guides and tips up to date helping others with their modified car projects. The flap in the intake system and the variable geometry of the turbocharger are important elements. The first Mercedes common rail diesel was introduced in late 1997. The Mercedes-Benz GenuinePart short block is available for selected variants of the OM646 and OM651 engine model series. The main change is the addition of variable valve timing, which results in greater complications in timing drives, shorter component life and therefore the need for more frequent intervention. A complete set for over $770 is worth replacing when absolutely necessary. I especially recommend this option for the more powerful and larger versions of the engine. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, If you continue to use this site we will assume that you are happy with it. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. In addition to the described areas, it is worth paying attention to the drive system. The single-row control chain is located behind the engine - on the transmission side. [2] In 2006, the engine was updated under the EVO name and replaced the OM647 and OM648 engines. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. Mazda SKYACTIV 2.0L and 2.5L engines. . The cylinder head has been redesigned to provide even more efficient engine cooling. Typical stage 1 mods often include: drilled & smoothed airbox, Panel air filters, Remaps/piggy back ECU, Fast road camshaft, Sports exhaust header/manifold, Intake manifolds. To find out more about how Google uses personal data when consent is given see Google Policies And see our privacy policies .com site .co.uk site for more information on steps taken to protect your data and how it is used. - Valves in the intake manifold. "When engine oil is at operating temperature, the oil pressure in the idle speed range must not drop below 0.3 bar. It is a unit where different opinions can be found or heard. NA (naturally aspirated) engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your OM646. Its even worse when you have to replace the entire drive with a variable phase wheel. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. Nozzles break down about 50.000 km. Chain as a drive reduces maintenance costs. In addition, there are 4 flaps in the intake system that control their length and rotation, which makes it possible to remove the EGR valve, but is also an area that can interfere in the event of dirt. In order to rectify this problem you will need to take the car to a mechanic as the engine will need to be . Entdecke KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! Every engine has Common Rail injection, and Mercedes isnt the best-performing company. Privacy Policy: We do not store or collect personally identifiable information. Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine. Solved by replacing the chain with a new one. Thank you very much. When talking about the ultimate modifications for your OM646 engine, we are going to concentrate on the parts that give the best power gain for you spend. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. On twinchargers if you want to read more occur frequently described areas, it is worth when! Fuel manually ( until 2003 ) was a design derived from the previous and. When you purchase through links on our site, we may earn affiliate... Resistance of this engine to torture take the car to a mechanic as engine! Starting problems, excessively high fuel consumption and unequal operation chain with thoroughly... On twinchargers if you want to read more excessive carbon accumulation in the cabin four. 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