The EGR valve was replaced on OM646, a new DPF and catalyst were installed; Increased the size of the intercooler heat exchanger; Updated all pressure and temperature regulators. Es ist ein Problem . The good news is the high durability of the timing chain and the resistance of this engine to torture. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. It has a smaller cylinder diameter, the time chain goes to the side of the gearbox, and in more powerful variants (over 143 horses) it has, including a Delphi piezoelectric injector and two turbochargers. The displacement of the new version of the engine is 2143 cm3. Solving the problem is not complicated and not too expensive. GASKET CYLINDER HEAD FOR MERCEDES-BENZ OM646.821/811/820/812/701 2.1L 4cyl. A number of solutions included in the TwinPulse name are used. Help us improve, leave a suggestion or tip. So, for the replacement, the whole machine had to be removed! Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. The culprit is the coolant pump. "All you need to know about tuning the Mercedes OM646 engine!". The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. Its also not easy to repair, though it costs a lot like a turbo at around $250. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. Combi with so round that it has a bit bigger 470 l for roller shutter. Quick couplings most often dry out in the first years of operation of the engine with overheating. The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). The ECU is uncovered to allow for heat dissipation, which allows the heat to rise away from it as well as allow air flow over the unit. Which helps us keep our guides and tips up to date helping others with their modified car projects. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). Tuning . and operation, along with removal and installation of components. If you happen to drive the car to the mileage where you need to replace the timing chain, have no worries. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Read more here! Please watch this video and subscribe to my YouTube channel. The 2.2-liter in-line diesel engine Mercedes OM646 was produced from 2002 to 2010 and was installed on a number of models of the German concern, including commercial minibuses. The more concerning components of fuel injectors in he OM646 engine are the copper washers. This engine continued the modular tradition. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. It was also installed on the E-class W210, Vito and Sprinter. It is one of the most costly upgrades but provides the best gains. The new engine was the first common rail Mercedes diesel engine. (In some cases, as the factory ECU is locked flashing is not an option, so an aftermarket ECU is the route to take, and many of these will outperform factory ECU's but make sure it has knock protection and that you get it setup properly.). The updated OM646 EVO has 90 parts replaced. Their pistons are exactly the same. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Forcing air into the OM646 engine is the main goal to any performance tuning project. General description. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. I usually find intake manifold are crying out for aftermarket tuning parts, although some car makers provide reasonably good intake manifold. 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 . If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. Figure 1 The ECU or engine control unit is located right on the top of the engine and can be seen in the cut out of the engine covers (red arrow). Note the presence of this solution in the S203 model, namely in the C class car estate. Specifications Of The Mercedes 2.2 CDI OM611 Engine. As befits a Mercedes comfortable. Another weak area is the intake system. Bosch fuel system Well, the drive is located on the side of the gearbox. In summary, all gasoline engines can be recommended. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. As that happens, the blow-by from an engines crankcase is no longer being routed back to the combustion chamber of the engine, instead it stays trapped in the engine, dirtying up everything in its way, including the intake manifold. Shopping for a Mercedes-Benz? Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Particle filter accessories arent the most durable either. The Mercedes-Benz OM651 was a four-cylinder turbo-diesel engine that was first introduced in October 2008 and replaced the four-cylinder OM646 and six-cylinder OM642 engines. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. The Mercedes 2.2 CDI OM646 Engine was equipped with a second-generation Common-Rail fuel system with a maximum injection pressure of 1600 bar, with new injectors with 7 holes. and ceramic glow plugs for improved engine starts. Why word? This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. These Mercedes Engines Won't Last 100,000 Miles!Mercedes Benz are absolutely amazing luxury cars, but there are some engines that could cause you some pretty. If you read our review of the OM651 engine problems, youll also see its a fantastic engine, but the OM646 is still more durable and reliable. The flaps wear out and break. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. 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. Regulators regenerate most often. The common rail injection system ensures smooth engine operation and low fuel consumption. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. This makes engine repairs much cheaper. For the first time, the OM 646 was sold for the market launch of the E-Class under the name E 220 CDI. This is not the coolest tolerance, but you should not neglect it. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. 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. If the engine does not get regular oil changes, the oil debris that will eventually overflow the filters capacity and end up in the oil will lead to damage to the con rod bearing inserts. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. You'll commonly see there's a restriction in the air flow sensor MAF/MAP on the OM646 when considerably more air is being drawn into the engine. Mercedes E-Class W211 - OM646.951 OM646.961 The Mercedes OM642 are fantastic to work on and with the best sports mods like a remap, turbo kits and camshafts you will really enhance your driving opportunities. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. turbo to intercooler. Engines & Engine Parts; Gaskets, Seals & Hardware; Gaskets & Seals; GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L; See Details on Ebay GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L. - Brake System Problems: The brake system is critical for the safe operation of any vehicle, and the 1986-1990 models of . The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. Please help us improve these tips by sending us your feedback in the comments box below. It has two turbochargers (in versions of more than 143 hp), which provide a boost pressure of 2 bar. Longer valve durations can alter the torque band and on most engines the exhaust and intake durations do not need to match, although most cams and tuners use matched pairs there are some advantages to extending the intake or exhaust durations. keep up with our latest YouTube content and subscribe. Specifications and Modifications. Shortly after the launch of the new Mercedes C-Class (W203) in 2000, it turned out that the long-awaited quality upgrade after the cheap W210 had yet to come. AMG vehicles from 2007 to 2014. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. Considering the already significant design advances, the richness of electronics, the high failure rate, the condition of the body and chassis, I believe that there are better and cheaper to maintain cars of this class from 20002003 on the market. The engine was equipped with a Common Rail 2 fuel system. 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 . However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Other variants are ok. Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. Browse our daily deals for even more savings! Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. We use cookies to ensure that we give you the best experience on our website. Minibus 3.3. Free shipping on many items! One of the most notable features of the Mercedes C200 is its engine. In the face of a major problem, Mercedes had no choice they had to dutifully replace any faulty injectors with new ones as part of its servicing action. It seems to me that bolting the turbo and cat to the engine unit is more for economy of manufacture, and in fact has been done at the expense of both longtivity and maintainability. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. In practice, two seats with a small luggage capacity of 310 liters. *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of 500 per page (250 per image) used without permission, (This covers our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines.). During 9 years of production, OM651s 2.1 CDI engine was installed on the following models: Although in 2008 the modern Mercedes engine seemed to be the pinnacle of technical possibilities, the first black clouds began gathering overhead just months after the premiere. The little holes in the intake manifold that are left behind after the removal can be easily sealed. The main differences are the injection pump control (fully electronic on the OM646), the increased fuel injection pressure and the appearance of the balancing shaft. Secure dispatch in special transportation case. Regular oil + filter changes and frequent motorway runs will help to . In this new series I hightlight common or ridiculously expensi. Classic cars with converters have 5 or 7 gears. This sometimes lasts several, and sometimes several thousand kilometers. Excessive Carbon Build-Up. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. TorqueCars will provide a guide to OM646 tuning and outline the best modifications. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Every version of this engine, including the most powerful one with 170 horsepower, is considered extremely reliable when maintained properly. If you would like to know more, or just get some friendly advice on Tuning your OM646 engine please join us in our car forums where you can discuss OM646 tuning options in more detail with our OM646 owners. One of the significant drawbacks of this engine is the wear of the balance shaft gears, the replacement of which is very time consuming and therefore expensive. Advantages Costs. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. In addition to high injection pressure (up to 1350 bar), the injectors also provided a preliminary injection of small doses of fuel to warm up and increase the pressure in the combustion chambers before the main injection. Bosch electromagnetic devices can be repaired for 80-108 dollars. Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability, Specifications Of The Mercedes 2.2 CDI OM611 Engine, Modification: OM611 DE 22 LA red. Where is the number. Save my name, email, and website in this browser for the next time I comment. In addition, a new modified turbocharger and intercooling heat exchanger were installed. Less risky in the petrol version than in the W204 successor. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction. There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. 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. The system is aired. Extensive global service network of Mercedes-Benz workshops. OM602 engine 2.3. Loves high-quality and clean fuel. 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. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. Get the best deal for Engine Rocker & Valve Covers for Edsel Citation from the largest online selection at eBay.com.my. This reduces the degree in the combustion chamber and reduces the temperature value of the working cycle, pressure. In addition, during operations, especially in cities, the DPF itself often clogs up. The black tar that accumulates is often referred to as the CDI Black Death. If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. 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. Limp Mode? The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. 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