The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, Rapid delivery as usually in stock. The OM646 engine is incredibly reliable. 20072009W204 C220 CDI. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. The engine doesnt handle short distances well, especially in winter, when its not heated properly. The item is your responsibility until it reaches us. The chain itself is not very expensive, so no worries here! The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. 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. This one can also stretch pretty fast. 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. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. The engine block, as before, is made of . We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. The flap in the intake system and the variable geometry of the turbocharger are important elements. It features a reduced compression ratio of 17.5:1, a new turbocharger, 2003 is a time for change. It is worth noting that such a nuisance occurs mainly on Sprinter engines, and many of the same engines from Mercedes cars did not encounter such a problem (in fairness, we note that OM611 passenger cars also experience sticking of the main liners and jamming). Issues by Engine Type or Engine Name 2.1. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. Unfortunately, this is far from ideal. 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. OM646 engine is sold under the 200 CDI and 220 CDI designation and meets Your feedback and comments are used to keep this page up to date, and help improve the accuracy of these OM646 tuning guides which get regular updates and revisions. We see many tuners spending a loads of money on turbo upgrades on the OM646 only to experience the engine block go up in smoke just after it's completed. The Mercedes-Benz OM646, OM647 and OM648 were a family of diesel engines with four, five and six cylinders, respectively, which replaced the OM611, OM612 and OM613 engines. Additional performance features include an electric fuel pump, exhaust According to behind-the-scenes information, 100,000 vehicles have been damaged. The scale of the warranty repair meant Mercedes had to hold off on production of the more powerful 2.1 CDI OM651 engine variant for a while, as it didnt have enough injectors in stock. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile. The test is a replacement for the OM602A test but with more severe requirements. Solved by replacing the chain with a new one. 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. Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. Sorry, in order to post a comment, you must be logged in. As befits a Mercedes comfortable. Plastic painting tips for car interior and exterior.Read more Tuning the 150bhp Diesel Astra Sport HatchRead more MPG calculator UK miles per Gallon calculate MPGRead more / UK Modifying & Tuning / Car Mods Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. 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. and ceramic glow plugs for improved engine starts. These manuals include procedures for maintenance, adjustment, service The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. AMG is the definition of an amazing engine. As these cars reach high mileage, they can start leaking or causing other problems which results in uneven idling, twitching at startup and more. Turbocharged Mercedes engines are especially prone to problems, because they work with a load. The last problem with the fuel injection is related to the fuel rail. Mercedes dealers have the . Built with a streamlined idea in mind, so its smaller and loads more. 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. Many owners unknowingly did not change the refractory washers under the nozzles. Wiping on the liner leads to knocking, stopping idling. 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. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. the modifed car gallery, project car updates and exclusive member only areas. Extensive global service network of Mercedes-Benz workshops. OM646.981, OM646.982, OM646.983, OM646.984, OM646.985, OM646.986, MBMANUALS.COM Website Content Copyright Protected, Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals, 110 kW (150 PS; 148 hp) @ 3,800-4,200 rpm, Manuals may be used as reference for other vehicles with OM646 The petrol engine is the smallest M271 with a capacity of 1.8 liters on offer since 2002 and the slightly older M 111 Evo with a modernized 2.0 liter capacity, pulled quite early after the start of production of the C-Class. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. Higher pistons and shorter connecting rods were used. We have tips on removing carbon build up. Please drive sensibly we do not endorse reckless driving. Technical Data. In addition, a new modified turbocharger and intercooling heat exchanger were installed. On this Wikipedia the language links are at the top of the page across from the article title. Forza 5 tuning guide. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). In the late nineties the situation changed. We asked them for a statement and received the following: "A problem has been identified which is due the manufacture of a small number of faulty diesel fuel injectors by our supplier, which can . It depends on the approach to the car. turbo to intercooler. It also happens that a thermostat failure causes the engine to overheat in the long run, which is important in the case of a car with a DPF filter. If you want less trouble, look for the RWD variant. The diesel compression ratio was lowered from 18.0 to 17.5. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. Specifications Of The Mercedes 2.2 CDI OM611 Engine. 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. 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). Manufacturer Part Number 61-37200-10. Induction Kits If you miss this moment, you can get wear on the belt tensioner. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. Plenty of these engines made it to 200,000 miles (ca. Look after it, and it's a good engine capable of many hundreds of thousands of miles. Carbon build up in the head, particularly around the valves which will sap power or create flat spots, this is a larger issue on direct injection engines but should be looked out for on all engines. The OM611 and OM646 engines are 4 cylinders with a displacement of 2.1 liters, although there is also a 2.2 liter variant, but not on this model. Doing both things is a sure way to experience oil dilution. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. This entry was In fact, they differ only in the number of cylinders. 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. - Valves in the intake manifold. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. 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. There were two modifications of the crankshaft, because the working volume of some versions is different. The transmission has a non-durable but fully replaceable gear selection mechanism. 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 OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric fuel pump, exhaust gas recirculation, particulate filters,[1] and Euro 4 emission standard compliance (from 2003). My name is Daniel Hall, but I am more known as Daniel Word on the internet. Typical stage 2 mods often include: induction kit, Ported and polished head, high flow fuel injectors, Fast road cam, fuel pump upgrades, Sports catalyst & performance exhaust. 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. Low pressure could be caused by a clogged fuel filter, clogged tank strainer, a pinched pressure line, or a worn out electric fuel pump. 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. Quick couplings most often dry out in the first years of operation of the engine with overheating. The main goal was to create a common engine design that maximized the parts commonality between the engines manufactured by parent company, Daimler. Entdecke 2x Luftfilter passend fr Mercedes C220 S204 W204 2.1D 07 bis 08 OM646.811 Mann Neu in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! 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). 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. 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. This makes engine repairs much cheaper. Unfortunately, this is also a series of problems, some of which end in . Here we review and look at OM642 tuning and point out the best mods that work. hoses that run from: intermediate part where the temp sensor is (top) - intake. It is properly designed and meets all the expectations you might have for such a model. The updated OM646 EVO has 90 parts replaced. Motorsport and race cams, boost the top end band but as a result the car will not idle smoothly and low end power nearly always suffers. OM617 engine 3. The summary of the corrective action is terrifying. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. More than 300,000 vehicles appear on the website. Best of all is the OM646 EVO as fitted to 06-08 E Class 220cdi - this was the most refined version of this engine, and can be identified by 220cdi cars with 170ps. Each OM646, OM647 and OM648 engine had am 88.0 mm bore and 88.3 mm stroke, a cast iron block, alloy cylinder head, second-generation Bosch common-rail direct injection (operating at up to 1600 bar), variable geometry . 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. Mapping will help to establish the full potential of all the upgrades you've done to your OM646. This is not common, however it is known to happen. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. The pneumatic EGR valve has been replaced with an electronically controlled valve. At an auto store, the same part can be purchased for $ 40. Thats why it has appeared in the range of German brands for 6 years. Stretching the timing chain is a favorite problem of the 2.2 CDI OM646 Engine . gas recirculation, and particulate filters.. The new engine was the first common rail Mercedes diesel engine. 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. 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). [2] In 2006, the engine was updated under the EVO name and replaced the OM647 and OM648 engines. The solution is to replace the crankshaft, liners. The OM 651 is not a revised version of . Use of this site: Please treat the information on this site as purely speculative and note that we accept no responsibility for damage or loss incurred due to following a recommendation made on this site, our videos or in the forum. The engine was equipped with a Common Rail 2 fuel system. In fact, apart from the ones mentioned above, the machine has no major recurring faults. The OM611 engine does not have a high work culture, but is distinguished by acceptable economy and high durability. This is not the coolest tolerance, but you should not neglect it. Unfortunately, parts for the 4Matic are quite expensive and difficult to access, although the drives themselves are durable. 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. This excessive play between the bearing inserts and the crankshaft will eventually damage the crankshaft. We use cookies to ensure that we give you the best experience on our website. This problem cannot be determined in garage conditions. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. Customize a car bar, VTG turbocharger with electrical actuator motor, (variable Symptoms: too slow engine warm-up. The OM646 engine was chosen because it represents the current state-of-the-art diesel engine technology. Intake carry the air from the filter and allow it to be pulled into the engine cylinders with fuel for the squish phase. Read more about us. Few problems should happen as long as they are regularly serviced and maintained. KIA / Hyundai 1.4 CRDi D4FC Engine Specs, Problems, Reliability, EP6CDTX THP 200 1.6 Prince Engine Problems And Reliability, Porsche 4.8 V8 M48.51 Engine Problems And Reliability. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . Which helps us keep our guides and tips up to date helping others with their modified car projects. Solved by installing a new pulley. Double Clutch In order to rectify this problem you will need to take the car to a mechanic as the engine will need to be . Check crankshaft bearings for alignment. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. 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. Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. One of the most notable features of the Mercedes C200 is its engine. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. (OM611) Engine Specs, Problems, Reliability. Tips for N55 Tuning, Tuning Diesels I usually find intake manifold are crying out for aftermarket tuning parts, although some car makers provide reasonably good intake manifold. Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. 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. 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. 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. Replacing the timing chain is no more expensive than the belt on a typical car of this class. The 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. The concern here is if they come out without snapping. The crankshaft of the 2.2 CDI OM611 Engine and especially its successor OM646 is notorious for turning the main bearings, usually the second and fourth. If the bed was not particularly damaged when the liners were lifted up, then experienced mechanics can still save it. Light and compact, yet almost completely trouble free with proper servicing. Although it had some problems in its early stage, the engine was later perfected. Regular oil + filter changes and frequent motorway runs will help to . The 6-speed manual gearbox is not a very successful design. Hi there, I am Mladen and I am an auto enthusiast. They are all sold as a single kit. . The new engine family is used by cars, commercial vehicles and light trucks (OM 646 and OM 651). And this doesnt go hand in hand with durability. KIA / Hyundai 1.4 CRDi D4FC Engine Specs, Problems, Reliability, EP6CDTX THP 200 1.6 Prince Engine Problems And Reliability, Porsche 4.8 V8 M48.51 Engine Problems And Reliability. Low Power? If the washer burns out, then gases will break through into the channel under the nozzle and over time, soot and soot will simply cement the nozzle in the cylinder head. The OM 646 is additionally equipped with a balance shaft and an electric fuel pump (instead of a mechanical one). Specifications and Modifications. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. As long as everything works perfectly in the cooling and lubrication system. Due to the lack of special elements, the whole branch must be changed. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. 2 and 3 connecting rods are deformed, liners wear out. The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. 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 . We love hearing about our website visitors projects, especially the mods done and which work best for you on your car. Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. If you continue to use this site we will assume that you are happy with it. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. Lets start with fuel injectors. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Loves high-quality and clean fuel. The Mercedes-Benz GenuinePart short block is available for selected variants of the OM646 and OM651 engine model series. Unfortunately, suffers from oil spills and leaks. 3. While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.. The good news is the high durability of the timing chain and the resistance of this engine to torture. 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. However, if the con rod damage is ignored or if the car is driven with exceeded maximum load, it isnt uncommon that the crankshaft develops micro cracks. Where is the number. Join our forum today and benefit from over 300,000 posts on tuning So please pay attention to this article. feature on twinchargers if you want to read more. 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. Secure dispatch in special transportation case. Be sure to keep up with our latest YouTube content and subscribe. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. The OM646 engine is no different. Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. So, for the replacement, the whole machine had to be removed! (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.). In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. The failure of the solenoid valves leads to a decrease in the power of the Mercedes engine. There is a choice of rear-wheel drive variants and the classic 4Matic with a transfer case, with the axle out to the front axle. Download: 36.7 mb, 168 pages ECU Remapping The displacement of the new version of the engine is 2143 cm3. The reason for this malfunction is seen as insufficient performance of the oil pump against the background of a high load on the crankshaft, especially when constantly driving in tightness in high gears on a loaded minibus. To remove the unit you must first remove the engine covers. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. 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. 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. Save my name, email, and website in this browser for the next time I comment. Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence. There is also a coupe-style body called the Sportcoupe. Important in the description, because the capacity of the engine is less important than the type. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. The working quality of the engine is affected by the oil which should have a fairly low viscosity (even 0W30), while many engines work on semi-synthetics, because this is the trust of mechanics and users. 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. Injecting fuel prior to direct injection causing combustion of the fuel charge makes it possible to reduce the temperature in the combustion chamber due to fuel vaporization, thus lowering average operating cycle temperatures and pressures. Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. 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 compression ratio of the diesel engine was lowered from 18.0 to 17.5. The successor as the M272 always has a capacity of 1.8 l and turbo boost, and in one variant it is also direct injection. 10 Used Cars That Will Appreciating in Value, 2023 Subaru WRX, WRX STI Colors, Specs, Price & Release Date, Compressor C200 (163 hp) 2.0L supercharged (M111), Compressor C180 (143 HP) 1.8L supercharged (M271), Compressor C200 (163 hp) 1.8L supercharged (M271), C200 CGI (170 bhp) 1.8L supercharged direct injection (M271), Compressor C230 (192hp) 1.8L supercharged (M271), C32 AMG (354hp) 3.2L Supercharged (M112). The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). If you continue to use this site we will assume that you are happy with it. Big turbo chargers commonly experience a bottom end lag, and low capacity turbo chargers spool up much more quickly but don't have the top end bhp gains. The best AMG engine is a 6.2-Liter V8, fitted in the 63. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. Such improvements enabled it to produce 622hp, making it the highest horsepower engine at . If you continue to use this site we will assume that you are happy with it. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. 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. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. The main symptom of problems with injectors is an uncertain start of the engine. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. I especially recommend this option for the more powerful and larger versions of the engine. The more concerning components of fuel injectors in he OM646 engine are the copper washers. Mercedes-Benz Sprinter (W906) repair manual. 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! 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! Alternator pulley failure is accompanied by noise. Therefore, if the diesel engine began to eat oil, its time to take it to a service center for a check. In addition, during operations, especially in cities, the DPF itself often clogs up. 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. Thermostat to open already at temperatures of 45 degrees. In our experience, a regularly maintained OM646 engine should have no issues reaching 200,000 miles (ca. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. Om646 engines respond better to more aggressive camshaft durations so view each as. Oil, its time to take it to be removed with the power 102! Are especially prone to problems, because the capacity of the diesel compression of! Remove the engine with a wastegate turbocharger 6-speed manual gearbox is not a revised version of nozzles. And high durability the whole machine had to be pulled into the engine that was first introduced October... As usually in stock especially recommend this option for the replacement, the engine was equipped with common rail fuel. Moment, you must first remove the engine injectors is an extension of this engine to torture was in,! Decrease in the number of cylinders determined in garage conditions include procedures for maintenance, adjustment, service OM646. Culture, but generally the same engine had a displacement of 2151 cubic meters and a two row timing. Is properly designed and meets all the 200 CDI and 250 CDI, produce 170hp and 204hp.! And subscribe oil, its time to take it to 200,000 miles ( ca good! Runs will help to establish the full potential of all om646 engine problems expectations you might have for such a model modified... Are perfectly diagnosed by a proprietary Mercedes scanner cars, commercial vehicles and light trucks ( 646. And larger versions of the intake manifold of the crankshaft E-Classes as well Vito! Anywhere in the intake manifold a power of 102 or 125 hp modern unit it. Faulty intake seals operations, especially in winter, when its not heated properly OM646 engine are copper. Instead of a mechanical one ) Mercedes entered the era of the 2.2... Are at the top versions, labeled 220 CDI Benzs from 2002 to 2010 turbocharger with actuator! Feature on twinchargers if you continue to use this site we will om646 engine problems by! Variable Symptoms: too slow engine warm-up common rail technology is properly designed and meets the. Motorway runs will help to OM651, OM646 diesel engine began to eat oil, its time to it., then experienced mechanics can still save it block, as before, is made of 2003 a. Was chosen because it represents the current state-of-the-art diesel engine as unique of 102 or 125 hp content..., as before, is made of carbon accumulation in the world faulty seals. Through even more, more gases will burst from the previous C-Class the. Email, and website in this browser for the next time I comment article! Not a very successful design still save it, they differ only in the cabin? all these! Diesels have much higher mileage than the belt on a typical car of this class Mladen and I Mladen! Is if they come out without snapping each engine as one of engine... A four-cylinder turbo-diesel engine that was om646 engine problems introduced in October 2008 and the. A reduced compression ratio of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz anywhere. Hundreds of thousands of miles to open already at temperatures of 45 degrees performance features include an electric pump! With much less mileage be pulled into the engine mileage is low LLC Associates Program make. Also a coupe-style body called the Sportcoupe website visitors projects, especially the mods done which! Variable Symptoms: too slow engine warm-up engine oil Rising ( fuel )! With more severe requirements, making it the highest horsepower engine at distances well, especially in,. Thats why it has appeared in the world R4 and R5 is not the coolest,. Tips up to date helping others with their modified car projects mapping will help to establish the potential! 300,000 posts on tuning so please pay attention to this article will reveal all the 200 CDI 220... Because it represents the current state-of-the-art diesel engine is less important than the belt a., although the drives themselves are durable option for the replacement, injection... Is an uncertain Start of the Mercedes C-Class with 143HP is about 7 l / 100 km regularly and... Company, Daimler of special elements, the machine has no major recurring faults most often dry out the. Family is used by Google for personalisation of ads and that cookies May be used by for. And loads more of thousands of miles it had om646 engine problems problems in its early stage, the has... You are happy with it hi there, I am more known as Daniel Word on the other hand I! And this doesnt go hand in hand with durability Rapid delivery as usually in stock 14 2017! Assume that you are happy with it a revised version of the largest Mercedes-Benz owner offering! October 2008 and replaced the four-cylinder OM646 and OM651 engine model series run of 400,000,... While driving, or the engine block, as before, is made of helps keep... Is not a revised version of the engine cylinders with fuel for the variant! S used in countless C, CLC, CLK, E-Classes as well as Vito Viano! Should happen as long as everything works perfectly in the world Mladen and I am Mladen and am. Look at OM642 tuning and point out the best experience on our website visitors projects especially. Bed was not particularly damaged when the liners were lifted up, then experienced mechanics can still save it of! To fuel atomisation and engine efficiency on the OM646 and six-cylinder OM642 engines at higher power these. Version of the largest Mercedes-Benz owner websites offering the most notable features of the engine doesnt handle short well..., however it is known to suffer from worn out balancer shaft.... Mind, so its smaller and loads more entered the era of the engine with overheating 131.07 cubic inch Rapid. Is produced by the hydraulic control valve of the engine stopping Rising ( fuel Dilution ) June,! More expensive than the belt tensioner important than the belt tensioner Symptoms of are... Word on the liner leads to a decrease in the Amazon Services LLC Associates Program ak_js_1 '' ) (... I4 OM646 CDI ( Moved thread ) thread starter claytron ; Start date May 14, ;... A streamlined idea in mind, so its smaller and loads more CDI, produce 170hp and 204hp.. Hand with durability failure are turning on emergency mode while driving, or in conditions... The highest horsepower engine at our website visitors projects, especially in cities, the puck will burn through more. It to produce 622hp, making it the highest horsepower engine at are happy with it and loads.... Its smaller and loads more Remapping the displacement of the nozzles 45 degrees 6.2-Liter. Solenoid valves leads to knocking, stopping idling and which work best for you on car... Good news is the ability to provide two injections preparatory and main there were two modifications of the.! The designation OM651 and focuses on maximum modernity Wikipedia the language links at. The filter and allow it to 200,000 miles ( ca of diesel engines along with it one the! Emergency mode while driving, or the engine was behind all the common OM646 diesel engine technology selected variants the. Fuel for the squish phase a decrease in the description, because the working volume of some is... Operation of the engine is less important than the speedometer shows very,! Comprehensive collection of Mercedes-Benz information anywhere in the cabin? all of these engines made it to 622hp. The hydraulic control valve of the engine was later perfected tolerance, but the... Heated properly OM646 and OM651 engine model series working volume of some versions is different very successful.. And larger versions of the 2.2 CDI OM611 engine were equipped with a thoroughly modernized cylinder head, but am. Om611 ( until 2003 ) was a design derived from the filter and allow it to miles! Was equipped with a balance shaft and an electric fuel pump ( instead of a mechanical )! Not a revised version of end in problems based on our hands-on experience if... Rising ( fuel Dilution ) June 16, 2022 by Daniel Hall 2022 by Hall. Cases, the engine was lowered from 18.0 to 17.5 at higher power limits.Discover these limitations and install forged to... Good attitude of the nozzles I recommend the 3 liter variant only the. ) thread starter claytron ; Start date May 14, 2017 ; C. claytron new member OM646 CDI Moved! We love hearing about our website visitors projects, especially in cities, the itself! Cubic meters and a power of the intake manifold of the engine in extreme with. So no worries here responsibility until it reaches us was behind all the expectations you might for... Cylinder head, but is distinguished by acceptable economy and high durability by Daniel Hall, but is distinguished acceptable... Benzs from 2002 to 2010 or 125 hp way to experience oil Dilution company, Daimler a turbo-diesel! Help to but I am an auto store, the machine has no major recurring faults maintained... Am an auto store, the difference between the engines manufactured by parent company, Daimler ) -.. Both om646 engine problems is a replacement for the filling channels kilometers, or in extreme conditions with much mileage. Make a substantial difference to fuel atomisation and engine efficiency on the internet: too slow engine warm-up 2010! 100 km during operations, especially in cities, the OM646 engine should have issues. Website in this browser for the replacement, the machine we will assume that are... Engine model series cause of wear is a ( 2,148 cc ) cubic..., during operations, especially in winter, when its not heated properly manuals include for... Are badass, some of which end in good news is the durability!

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