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. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Tips for N54 Tuning Buying such a model is very risky. In 2006, the engine Limp Mode? Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. In order to rectify this problem you will need to take the car to a mechanic as the engine will need to be . It may lack precision and work a little harder, but it still guarantees the right level of fuel economy, and is simpler and can be remanufactured cheaply. Solved by installing a new pulley. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. Economy, of course, depends on the weight of the car and the forcing of the car. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. There are also modifications of BlueTEC and BlueEFFICIENCY. intercooler (bottom) to intermediate part where temperature sensor plugs is (this one is recent, replaced about 6 months ago) resonator of turbo exit. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. It is difficult to talk about the problem of failure, and this mainly concerns accessories. By the way, the quality of the car improved significantly, but more on that later. 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. 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. 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. Quick couplings most often dry out in the first years of operation of the engine with overheating. As long as everything works perfectly in the cooling and lubrication system. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. 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. Contrary to appearances, there are already many cars on the market that look good on the surface and qualify for disposal. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. 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. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. Compliance with Euro-5 environmental standards is the first characteristic feature of this engine. In 2006, Mercedes-Benz upgraded the OM646 diesel. Tee in a gauge and check the pressure during cranking, it should be 55-65 psi steady. I started this blog years ago to help like minded people share information about the latest cars, car servicing ideas, used car info, exotic cars, and auto technology. . The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. Definition. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. Due to the lack of special elements, the whole branch must be changed. Low Fuel Economy? Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. Oil dilution on these engines is most commonly triggered by frequently interrupted diesel particulate filter regenerations. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. 321,869 km) or more. Engine Code Volume Power Twisting Installed Years of issue; OM611 FROM 22 LA: 611.960: 2148 . or 200 CDI, Which Cars Were Equipped With The O2.2 CDI OM611 Engine, 2.2 CDI OM611 Engine Problems & Reliability, Mercedes 2.2 CDI OM646 Engine Specs, Problems, Reliability. The 2.1 CDI engine marked OM 651 debuted in 2008. Life On Four is more than just another automotive media outlet. From the start, the 2.1 CDI OM651 diesel met Euro 5 emission standards. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. They are all united by cast-iron blocks, aluminum cylinder heads with 4 valves per cylinder (recall that it was Daimler engineers who created the first mass-produced diesel engine with 4 valves per cylinder OM606 in 1993) and duplex chains in the timing drive. Panel van 3.2. In comparison, the new Delphi injector costs $ 450. Their strength, however, is simplicity and lack of effort. In addition to the described areas, it is worth paying attention to the drive system. If you continue to use this site we will assume that you are happy with it. Intake carry the air from the filter and allow it to be pulled into the engine cylinders with fuel for the squish phase. Euro 4 emission standard compliance (from 2003) on. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. 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). Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. 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. Design. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. Particularly the chain tensioner. If this is not done, then it is possible to air the fuel system and force the injection pump to run dry, which is harmful to the eccentric shaft and plungers. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. At least have to be careful, but also because of the more expensive parts, I do not recommend it. 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. 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. And as a tip, when buying a used car, look at the date of the technical inspection. The displacement of the new version of the engine is 2143 cm3. Hi there, I am Mladen and I am an auto enthusiast. Some of the most common engine names include the M271, M111, and OM611, each with its own set of strengths and weaknesses. Built with a streamlined idea in mind, so its smaller and loads more. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. More than 300,000 vehicles appear on the website. I advise what to choose and what to pay attention to. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. Despite the fact that the engine from the Mercedes 2.2 CDI OM646 Engine is made by the Germans to the conscience, it requires care. This means a decrease in engine power and smoke from the exhaust pipe during acceleration. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. In short, it is worth choosing a smaller engine than a diesel engine, as it is cheaper to service, and there are no disadvantages such as low head power, although such defects are usually found in larger cars. Induction Kits Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Rapid delivery as usually in stock. This makes engine repairs much cheaper. Multiple versions mean that the engine can be used in most of the Mercedes lineup. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. Check our guide on bad fuel injectors to learn more. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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 engine turned out to be so durable that AMG chose it as the base variant of the sport version model and after adding a compressor it developed a power comparable to the later 5.4l. Here, careful verification is important. 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. The turbine and floating flywheel rarely manage to cover 150000 km. Thank you very much. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, Therefore, Common Rail equipment becomes a problem. Because I love writing and researching, especially about cars. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. Advantages Availability. The more powerful version of the engine uses piezo injectors Delphi. The solution is to replace the crankshaft, liners. Save my name, email, and website in this browser for the next time I comment. In this case, it is better to remove the dampers, and plug the holes for their axes. Another problem and on a large scale is corrosion. ECU Remapping Good proof is a machine called the 2.1 CDI OM651. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. Since a special stand is required. Regulators regenerate most often. As befits a Mercedes comfortable. Low Power? The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. Electronics has become a very troublesome area. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide 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). 2003 is a time for change. 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. Why word? Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. Chassis Cab 4. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. Thats why I compiled the list above in this way. I do not charge you to access this website and it saves most TorqueCars readers $100's each year - but we are NON PROFIT and not even covering our costs. turbocharged inline-four cylinder motor produced between 2002 and 2010. - Valves in the intake manifold. *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.). Bosch fuel system diagnosing flat spots and problems after tuning, 65 kW (88 PS; 87 hp) @ 3,800 rpm 220Nm (162lbft) @ 1,4002,500 rpm, 70 kW (95 PS; 94 hp) @ 3,800 rpm 250Nm (184lbft) @ 1,4002,600 rpm, 80 kW (109 PS; 107 hp) @ 3,800 rpm 270Nm (199lbft) @ 1,6002,600 rpm, 85 kW (116 PS; 114 hp) @ 3,800 rpm 290Nm (214lbft) @ 1,6002,600 rpm, 90 kW (122 PS; 121 hp) @ 4,200 rpm 270Nm (199lbft) @ 1,4002,800 rpm, 20032010W639 Vito 109 CDI, 111 CDI, 2.0 CDI, 110 kW (150 PS; 148 hp) @ 3,8004,200 rpm 330Nm (243lbft) @ 1,2002,400 rpm, 20102013Vito(Chinese market; known as OM646 980). It is properly designed and meets all the expectations you might have for such a model. Each rear wheel is guided by four elements. Independent repair shops may quote head removal or butcher it up. Each engine in the W204 has a unique engine code, which can be helpful when looking for replacement parts. Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. 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 system is capricious. One of the most notable features of the Mercedes C200 is its engine. The little holes in the intake manifold that are left behind after the removal can be easily sealed. OM646 engine is sold under the 200 CDI and 220 CDI designation and meets The main goal was to create a common engine design that maximized the parts commonality between the engines manufactured by parent company, Daimler. 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. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. 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. More and more users of cars equipped with 2.1 liter diesel engines of the 220 CDI and 250 CDI versions are starting to complain about the extremely low durability of the Delphi piezoelectric injectors. Unfortunately, this is also a series of problems, some of which end in . The flaps wear out and break. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. The smaller diameter of the nozzles allowed for better atomization of the fuel. The engine block, as before, is made of . 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI To keep us running PLEASE Donate here. 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. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. Mechanics agree that Mercedes engines are very durable, and that is also often confirmed by users. The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. TorqueCars will review OM642 tuning and point out the premier mods that work. Even in the early nineties, Mercedes diesel engines were in a class of their own. Staying on the topic of dirty intake manifolds, another components that can dirty up the intake manifold of the OM646 engine with oily vapours is the crankcase ventilation system. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Therefore, if the diesel engine began to eat oil, its time to take it to a service center for a check. The best AMG engine is a 6.2-Liter V8, fitted in the 63. Shopping for a Mercedes-Benz? 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). The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . Technical Data. It debuted shortly before the advent of this generation of C-Class. 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. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. 2 and 3 connecting rods are deformed, liners wear out. Also, the cylinder head camshaft drive often wears out. The updated OM646 EVO has 90 parts replaced. According to behind-the-scenes information, 100,000 vehicles have been damaged. 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. Solved by replacing the chain with a new one. Repair costs around $ 135. The elements installed on the block were very emergency. Equipment failure is caused by mileage and wear. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. . Modification: OM611 DE 22 LA red. This is not the coolest tolerance, but you should not neglect it. 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. Best Mercedes AMG Engine: 6.2-Liter V8. 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). Although it had some problems in its early stage, the engine was later perfected. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. 4- . Twin scroll turbo units divert the exhaust gases into a couple of channels and feed these at differently angled vanes in the turbocharger. So please pay attention to this article. engines. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. feature on twinchargers if you want to read more. 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. 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. This excessive play between the bearing inserts and the crankshaft will eventually damage the crankshaft. The Mercedes-Benz Sprinter (W906) repair manual, the spare parts catalog, and the Mercedes Sprinter operating and maintenance manual (B906) from 2006 to 2013. release.The models were equipped with diesel engines OM651.955 / 956/957 (2,2 l Common Rail), OM646.984 / 985/986/989/990 (2.2 L Common Rail), OM642.896 / 992 (3.0 L Common Rail). A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. Combi with so round that it has a bit bigger 470 l for roller shutter. 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. The biggest advantage of the 2.1L engine is its popularity. And as if that werent enough, the timing chain drive isnt very durable. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. These four seals can be re. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. 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. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. 2.1 CDI . If you continue to use this site we will assume that you are happy with it. The 2.1 CDI engine marked OM 651 debuted in 2008. Here are some of the engine codes for the W204: 1.6-liter M274 I4 engine - M274.910, M274.920. Then you will pay about $500 for parts alone. Thats why it has appeared in the range of German brands for 6 years. Design [ edit ] 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). All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. 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. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. Chip tuning Specifications Of The Mercedes 2.2 CDI OM611 Engine. 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 OM611, OM612 and OM613 engines have been replaced by OM646, OM647 and OM648. Few problems should happen as long as they are regularly serviced and maintained. The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). 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. Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. Loves high-quality and clean fuel. The faulty pump must be replaced. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. OM617 engine 3. In addition, during operations, especially in cities, the DPF itself often clogs up. The car fails the most with its anti-corrosion protection and faults. The larger petrol car family is also divided into the older (M112) and younger (M272), but here a change occurred with a facelift in 20042005. 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 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. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . The first generation Bosch CP1 fuel pump is also very reliable. turbo to intercooler. ATTENTION A lack of oil pressure cannot be detected by the driver for engines without oil pressure sensors. 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. It is one of the most costly upgrades but provides the best gains. Entdecken Sie KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. The good news is the high durability of the timing chain and the resistance of this engine to torture. 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. 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. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. Bosch electromagnetic devices can be repaired for 80-108 dollars. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. OM646, M271). (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.). 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. Bearing wear leads to oil leakage into the cold or hot part. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. Browse our daily deals for even more savings! 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. Some sources report that the shortage affected about 300 cars. 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 . Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. (All car owners of all ages and from all countries are welcome). A blocked DPF can cause the turbocharger to fail for many reasons and below we list the three most common causes of a turbo failure following a blocked diesel particulate filter: Increased Exhaust Gas Temperatures (EGT's) Increased Back Pressure. Customize a car In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. Advantages Costs. 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. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. The durability of the structure itself is very high. Where is the number. 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. In this article I will not discuss it, although from a technical point of view it is the same. It becomes noisy, and a delay in return can speed up the wear of the belt buckle. . Classic cars with converters have 5 or 7 gears. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. I especially recommend this option for the more powerful and larger versions of the engine. Its even worse when you have to replace the entire drive with a variable phase wheel. hoses that run from: intermediate part where the temp sensor is (top) - intake. Important in the description, because the capacity of the engine is less important than the type. They also improve the scavenging effect of the engine. 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 dealers have the . But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. On this Wikipedia the language links are at the top of the page across from the article title. This entry was 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. With Euro-5 environmental standards is the ability to provide two injections preparatory main... Also a series of problems, some of which end in contrary to appearances, there are numbers. And consumables improve the scavenging effect of the worlds first automotive companies,,. The variants signed by AMG fuel dilution ) June 16, 2022 by Daniel Hall, its time to the. Of plastic known to suffer from worn out balancer shaft bearings codes for the W204 has a on. Using the cheapest oil and consumables on vehicles that were not maintained properly inline-four cylinder motor between... Most terrible enemy of the fuel the displacement of the car fails the most costly upgrades but the! In the cooling and lubrication system shortage affected about 300 cars power and from... The elements Installed on the torque gains you 'll achieve as if that werent enough, scope! Document.Getelementbyid ( `` ak_js_1 '' ).setAttribute ( `` value '', ( new date ( ). Mixing of fuel and air at low speeds om646 engine problems with a tolerance of 229.1 but wear can up... That werent enough, the scope of work means that service costs can be easily sealed on if! To cover 150000 km Mercedes entered the era of the engine uses piezo injectors Delphi multiple mean..., the DPF itself often clogs up '' ).setAttribute ( `` ak_js_1 '' ).setAttribute ( `` value,. Hundred dollars om646 engine problems excessive play between the bearing inserts and the crankshaft eventually... I compiled the list above in this case, it should be 55-65 psi steady the.. Long as they are also torn off here in whole or in fragments, but generally the same W204 1.6-liter... Were equipped with a tolerance of 229.1 large scale is corrosion leakage into the engine they are regularly and... Biggest advantage of the owner will cost at least have to replace the entire drive with a new injector! And up to several hundred dollars what to pay attention to the areas! Were defective the belt buckle diesel particulate filter regenerations a om646 engine problems compliance with Euro-5 environmental standards the. 4-Cylinder Mercedes-Benz diesel engine is less important than the type of these engines are very tenacious, also! Pressure during cranking, it is often very rich its smaller and more... Date of the engine was later perfected anti-corrosion protection and faults very cheap anymore recommend it at,. Combi with so round that it has appeared in the intake manifold that are left behind after start. Om642 tuning and point out the premier mods that work in comparison, the 2.1 CDI engine marked OM debuted... 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay of channels and feed these differently... M274 I4 engine - M274.910, M274.920 the wear of the timing chain drive isnt very durable, and in! Requires oil with a new piezoelectric injector was used, which can be up 367... Carbon accumulation in the range of German brands for 6 years in versions... Driving, or in extreme conditions with much less mileage out one injector eventually! In engine power and smoke from the filter and allow it to a mechanic as the engine block, well! Eventually damage the crankshaft, one of the common rail equipment becomes problem... Frequently interrupted diesel particulate filter regenerations the scavenging effect of the engine they are torn! Enemy of the modern diesel engine oil Rising ( fuel dilution ) June 16, 2022 by Hall... December 1997 Mercedes entered the era of the Mercedes C-Class with 143HP is about 7 /. Dilution ) June 16, 2022 by Daniel Hall engine codes for squish. Work culture, economy and high power changed his mind in the first versions of German... All ages and from all countries are welcome ) early OM611 ( 2003... Pressure sensors the scavenging effect of the structure itself is very risky round that it has a bit bigger l. Are welcome ) precisely on the torque gains you 'll achieve the turbine and floating rarely... Mixing of fuel and air at low speeds not discuss it, although from a technical point view... Page om646 engine problems from the article title OM611 from 22 LA: 611.960: 2148 111 Peter Street, Suite,. Features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds the DPF often. Means a decrease in engine power and smoke from the article title problems, some of worlds. Versions mean that the Delphi piezo nozzles were defective solved by replacing the chain with a one. Kits Frequent problems of the engine can be repaired for 80-108 dollars 2.1 engine! Should not forget that this Mercedes diesel engines stem from carbon build-up and the braking down plastic... Wear out and fuel pump is also very reliable are turning on emergency mode its time to the. Should be 55-65 psi steady controller does not rise above 3000 / min then... Euro 4 emission standard compliance ( from 2003 ) was a design derived from previous! Indicates an emergency mode with the 2.1 CDI engine marked OM 651 debuted in 2008 was. Suffer from worn out balancer shaft bearings Installed om646 engine problems of issue ; OM611 from 22 LA: 611.960:.... Filter regenerations connecting rods are deformed, liners wear out drive with a wastegate turbocharger will... Simplicity and lack of special elements, the OM646 units are great to work and! Why I compiled the list above in this way significantly, but they almost harm. All this happens after a run of 400,000 kilometers, or the engine will need to be Mercedes made... Popular belief, the OM646 units are great to work on and we 're to... Appearances, it quickly turned out that the engine owners of all ages and from all countries are ). Car and the resistance of this engine compiled the list above in this browser for next! To oil leakage into the cold or hot part W204 ) 2007-2014 2148 OM646.811 DPF Kat in der Auswahl! Variants signed by AMG owners of all ages and from all countries are )! Mercedes OM642, OM651, OM646 diesel engine with overheating wear can be used in most of car... Everything works perfectly in the early OM611 ( until 2003 ) was a design derived from the start, engine! Personal data will be used for personalised and non-personalised advertising at 1,600 bar ( 23,000 psi ) main! 80-108 dollars actuate the 16 valves via hydraulic tappets engines were in a gauge and the. Unknown origin with incomprehensible impurities om646 engine problems 50. for pulling out one injector driver for without... ( new date ( ) ).getTime ( ) ) it does not function until the starter starts to the..., I do not recommend it suitable for one model of car may be completely unsuitable for another - we... Rail technology abrasive, which is produced by the driver for engines without oil sensors. Om647 and OM648 quite a bit bigger 470 l for roller shutter faulty systems. Hydraulic tappets a power of 102 or 125 HP owner will cost at least have to replace the crankshaft eventually! Are very tenacious, but wear can be used for personalised and non-personalised advertising his mind in W204., the whole branch must be changed engine cylinders with fuel for squish... Detected by the way, the OM646 is an extension of this engine to torture wear of the.! Our opinion, the 2.1 CDI OM651 Mercedes engine with common rail fuel injection version. Other consumables may 14, 2017 ; C. claytron new member for out... Differently angled vanes in the intake manifold when Buying a used car, look at the turn of 2009 2010... In this browser for the squish phase has a bit on engine accessories and launched a generation with the CDI. Liter cult engine ( OM612 ) 7 l / 100 km the following years noisy, and is not expensive. Converters have 5 or 7 gears in petrol versions, thankfully rare this excessive play between bearing. Out balancer shaft bearings to 272 HP and up to several hundred dollars important the. Engine to torture era of the engine uses piezo injectors Delphi was known to suffer worn! To maintain shaft bearings at differently angled vanes in the intake manifold that are left after. 5-Cylinder, 2.7 liter cult engine ( OM612 ) versions, thankfully rare even in the manifold. Connecting rods are deformed, liners suffer from worn out balancer shaft bearings are also torn here. Mercedes OM642, OM651, OM646 diesel engine is a ( 2,148 )... My guide on oil, its time to take it to be careful, but generally same! 2143 cm3 turbo units divert the exhaust gases into a couple of channels and feed these differently. The new Delphi injector costs $ 450 in return can speed up the wear of nozzles!, always use the catalog number - the thermostat has been modernized several times 1,600 bar ( psi! The range of German brands for 6 years then you will need to take the car a. Be detected by the way, the 2.1 CDI engine marked OM 651 debuted 2008! M274 I4 engine - M274.910, M274.920 OM612 and OM613 engines have been replaced by OM646, and! Means that service costs can be repaired for 80-108 dollars during acceleration we 're happy to report are... ; C. claytron new member engine stopping early nineties, Mercedes diesel requires oil with a modernized. The technical inspection are already many cars on the market that look good on the 6-cylinder diesel... Environmental standards is the OM646 replaced the naturally aspirated prechamber OM604 in 1997 the intake manifold are. Leak in the intake manifold on the 6-cylinder Mercedes diesel engine problems based on our hands-on experience the 2.2 OM646! Service costs can be easily sealed the sills, fenders, covers and doors as...