The faulty pump must be replaced. Ping us if you have anything cool to share on the latest cars or how to make older cars more efficient, or just want to say hi! 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. Why word? If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. The 2.1 CDI engine marked OM 651 debuted in 2008. The differential pressure sensor usually falls first. Bosch electromagnetic devices can be repaired for 80-108 dollars. The system is capricious. Entdecken Sie KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay. Thats why I compiled the list above in this way. Many owners unknowingly did not change the refractory washers under the nozzles. As long as everything works perfectly in the cooling and lubrication system. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. In a car used daily, really you should, ideally aim to match your engines power to your cars usage. It is a unit where different opinions can be found or heard. While the turbocharger used by Mercedes on the 2.1 CDI OM651 engine was extremely durable, on the more powerful model with the Twin Turbo system, the airflow control malfunction occurred. The fuel system provided 2 pilot injections. And as a tip, when buying a used car, look at the date of the technical inspection. Good oil service and replacement of the standard oil pump with a more efficient one, with two gears, helps to extend the life of the crankshaft of the OM611 engine. Some of you might have read my guide on oil dilution and my personal experience with oil dilution on the 6-cylinder Mercedes diesel engine. Format: .pdf document, Applications: See Image >, Download Link Sent to your PayPal email address, OM646.951, OM646.961, OM646.962, OM646.963, OM646.966, OM646.980, By the way, mechanical compressors called compressors by Mercedes were not a source of trouble or major expenses, like the regular turbochargers in gasoline engines from that period. In recent times the market of turbo units is always moving on and we now see variable vane turbo units, allowing the vane angle is altered according to speed to lower lag and increase top end performance. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. It was available with a variety of petrol and diesel engines, including: 1.6-liter M274 I4 engine; 1.8-liter M271 I4 engine; 2.1-liter OM646 diesel I4 engine; 2.1-liter OM651 diesel I4 engine; 2.5-liter M272 V6 engine; 3.0-liter M272 V6 engine; 3.5-liter M276 V6 . turbocharged inline-four cylinder motor produced between 2002 and 2010. Jump To Article. The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. It is your responsibility to check and verify any tip advice or other articles content with a qualified mechanic before undertaking work or following instructions. Read more here! Due to the lack of special elements, the whole branch must be changed. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Save my name, email, and website in this browser for the next time I comment. The OM651 is the latest engine fitted to cars badged as 200/220cdi (the latest <W212> E Class), but these have a few more issues compared to the OM646, such as injector issues . 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. Tips for N54 Tuning Here is the complete list based on the engine variant (source; Wikipedia): If youre in a rush, heres a quick summary of all the common OM646 diesel engine problems: For those of you that want to know more details, make sure you continue reading as we dig deeper into these concerns and more. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. Compliance with Euro-5 environmental standards is the first characteristic feature of this engine. The pulley alternator in + can often fail. The 6-speed automatic gearbox is actually a manual automatic gearbox with sequential displacement without the use of a clutch. These manuals include procedures for maintenance, adjustment, service Oil dilution on these engines is most commonly triggered by frequently interrupted diesel particulate filter regenerations. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. Definition. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. Hence the problems faced by other and subsequent owners. The compression ratio is reduced to 16.2: 1. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. It depends on the approach to the car. We strive to provide the internet with information that will ease your purchase of a new or a used car. This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. OM647 and OM648 If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. The compression ratio is reduced to 16.2: 1. . Usual exhaust restrictions can be traced to the filters installed, so adding a faster flowing high performance aftermarket one will improve air flow, and rather than doing an illegal decat, will keep the car road legal. Light and compact, yet almost completely trouble free with proper servicing. The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. We have this feature on twinchargers if you want to read more. To improve engine starting, ceramic glow plugs began to be used. Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. As these cars reach high mileage, they can start leaking or causing other problems which results in uneven idling, twitching at startup and more. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. Remapping Diesels The four-cylinder in-line engine is the successor to the OM-646 four-cylinder series and is also intended to replace the weaker versions of the V6 OM 642 engine . Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. OM602 engine 2.3. Look after it, and it's a good engine capable of many hundreds of thousands of miles. The original cost over $ 80. Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. Mercedes-Benz OM646 engine: Successor: Mercedes-Benz OM654 engine: The OM651 is a family of inline-four cylinder automobile diesel engines introduced by Mercedes-Benz in 2008. The first generation Bosch CP1 fuel pump is also very reliable. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. To resolve or even prevent the problems with the plastic swirl flaps, many people decide to get rid of them all together. Depending on the model year and trim level, the car is equipped with a variety of engines, ranging from small four-cylinder engines to larger V6 engines. Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. Chassis Cab 4. 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. On the front, instead of a simple macpher, theres a system with two wishbones on the bottom with non-replaceable pins that arent very durable. In a direct comparison with its predecessor, consumption has been further reduced and the engine . 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. The chain itself is not very expensive, so no worries here! The engine was offered in five power variants. ECU Remapping If you continue to use this site we will assume that you are happy with it. They also improve the scavenging effect of the engine. Save my name, email, and website in this browser for the next time I comment. ! 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. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. We use cookies to ensure that we give you the best experience on our website. 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. On the example of a 2002 Mercedes C220 CDI with a manual transmission: Mercedes diesel is very reliable and will easily pass even 1 million km. In 2006, Mercedes-Benz upgraded the OM646 diesel. Therefore, if the diesel engine began to eat oil, its time to take it to a service center for a check. Classic cars with converters have 5 or 7 gears. (OM611) Engine Specs, Problems, Reliability. This entry was AMG is the definition of an amazing engine. In terms of issues, there were none that would occur frequently. It was also installed on the E-class W210, Vito and Sprinter. The durability of the structure itself is very high. keep up with our latest YouTube content and subscribe. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. Economy, of course, depends on the weight of the car and the forcing of the car. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. A complete set for over $770 is worth replacing when absolutely necessary. W204 Engine Codes. However, the compressor is a more complicated component and therefore a bit more emergency. Even in the early nineties, Mercedes diesel engines were in a class of their own. This reduces the degree in the combustion chamber and reduces the temperature value of the working cycle, pressure. Download: 36.7 mb, 168 pages the engine problems and damage described above. - Injectors. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. Low power models have a single turbo and a Bosch electromagnetic injector. . Technical Data. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. Fast road cams commonly boost the power across the rpm range, you may sacrifice a little low end power but your top end will improve. Shopping for a Mercedes-Benz? So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. So, for the replacement, the whole machine had to be removed! If an engine is turbocharged, upgrades are going to net you a larger power gain and most turbocharged engines are built using more solid components. Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. Its also not easy to repair, though it costs a lot like a turbo at around $250. In addition to the described areas, it is worth paying attention to the drive system. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. Check our guide on bad fuel injectors to learn more. The common rail injection system ensures smooth engine operation and low fuel consumption. Please watch our video which covers the 5 principles of tuning your car. The engine was equipped with a Common Rail 2 fuel system. Unfortunately, this is also a series of problems, some of which end in . Cookies are used to track visitor behaviour enabling us to monitor and optimise the effectiveness of our content via Google Analytics, and to remember your preferences and settings on this site. Regulators regenerate most often. We detect unauthorised copyright material taken from our site using pattern matching tools. Such improvements enabled it to produce 622hp, making it the highest horsepower engine at . Hi Guys, This ones got me pulling my hair out, and there isn't a lot of that :frown 2009 model year 906 633 Sprinter with L4 2.2 CDI Engine OM646-986 Mileage = 128,000 Came in a while back, needs a lot of Cranking then gradually fires up, real bad when cold, still not good hot. . Less risky in the petrol version than in the W204 successor. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. 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