om646 engine problems

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. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. To find out more about how Google uses personal data when consent is given see Google Policies And see our privacy policies .com site .co.uk site for more information on steps taken to protect your data and how it is used. So please pay attention to this article. The Fora platform includes forum software by XenForo. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. Classic cars with converters have 5 or 7 gears. Another thing to consider when buying a car is the rear suspension. They even covered one million kilometers without any mistakes. 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 . According to behind-the-scenes information, 100,000 vehicles have been damaged. Extensive global service network of Mercedes-Benz workshops. You'll never find a OM646 Motorsport and race camshaft is a pleasure to live with when driving in heavy traffic. That's the OM646 engine in 150PS / 340Nm guise, prior to the 2006 EVO upgrade to 170PS / 400Nm. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. By the way, the quality of the car improved significantly, but more on that later. motors, Lanchester balancer (to compensate for free inertial forces), Crankcase ventilation system with electrical heating element, Engine control unit with CAN gateway function, CDI-D common rail diesel injection (Delphi), Maximum peak pressure in the combustion chamber up to 165 OM642 oil pressure check. Higher pistons and shorter connecting rods were used. The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. Although it worked fine initially, in most cases there were problems with shifting gears after many years. Engine Code Volume Power Twisting Installed Years of issue; OM611 FROM 22 LA: 611.960: 2148 . According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. 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. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. Free shipping on many items! There are also modifications of BlueTEC and BlueEFFICIENCY. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. The best AMG engine is a 6.2-Liter V8, fitted in the 63. Minibus 3.3. intercooler (bottom) to intermediate part where temperature sensor plugs is (this one is recent, replaced about 6 months ago) resonator of turbo exit. (OM611) Engine Specs, Problems, Reliability. 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. A number of solutions included in the TwinPulse name are used. Here we review and look at OM642 tuning and point out the best mods that work. Fun fact: One of the team members behind Lifeonfour.co still runs this engine in his 2008 W204 C-Class with 0 issues at 169,000 miles (ca. Tuning the Mercedes OM646 and best OM646 performance parts. All content is subject to copyright protection - LifeOnFour 2023. Well, the drive is located on the side of the gearbox. Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, 2.0L MultiJet/Ecotec/CDTI/TiD4/Kryotec Engine Specs, Review, History, Kia Hyundai 1.4 MPi (G4FA) Gamma Engine Specs, Review, History. I started this blog years ago to help like minded people share information about latest cars, car servicing ideas, used car info, exotic cars, and auto technology. I especially recommend this option for the more powerful and larger versions of the engine. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. AMG is the definition of an amazing engine. Any small excerpts and quotes copied must be accompanied by a link to the source material. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. The engine was offered in five power variants. Also, the cylinder head camshaft drive often wears out. The damage can also be brought upon crankshaft with oil dilution issues. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. 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). Few problems should happen as long as they are regularly serviced and maintained. Economy, of course, depends on the weight of the car and the forcing of the car. 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. 1.8-liter M271 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860. 20072009W204 C220 CDI. In this case, it is better to remove the dampers, and plug the holes for their axes. Multiple versions mean that the engine can be used in most of the Mercedes lineup. Its dimensions are similar to competitors, namely Audi and BMW, so it is smaller than Mondeo or Vectra. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. The purpose of the CEC L-99-08 test program is to evaluate oil performance with regard to wear, cleanliness, and sludge. Built with a streamlined idea in mind, so its smaller and loads more. . 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. 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. The differential pressure sensor usually falls first. Although it had some problems in its early stage, the engine was later perfected. OM601 engine 2.2. Soon it turned out that another defect involved the time chain seal. Other variants are ok. Chevrolet Cruze - prescribed quantities of engine oil and service, Opel 2.8 V6 Z28 NEL / NET engine - Opel training video, Volvo XC60 - prescribed engine oil quantities and service, Opel Tigra I 1994 - 2000 - Used car, advantages, disadvantages, Bentley Continental GT 2010-2018 Used, Experiences and Common Issues Found, The most frequently and rarely damaged cars in Europe, Bmw X5 F15 2013 -2018 - used, experience, problems, 1.0 TSI engine - history, problems, experiences. 2 and 3 connecting rods are deformed, liners wear out. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. The first generation Bosch CP1 fuel pump is also very reliable. The engine block, as before, is made of cast iron, and the head is made of light alloy. - Valves in the intake manifold. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. Thats why I compiled the list above in this way. Hi there, I'm Mladen and I'm an auto enthusiast. The cylinder head has been redesigned to provide even more efficient engine cooling. The system is aired. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. Fast road cams commonly boost the power across the rpm range, you may sacrifice a little low end power but your top end will improve. The OM646 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. Weak spots, Issues & problem areas on the OM646. Remapping Diesels The more powerful version of the engine uses piezo injectors Delphi. Chassis Cab 4. On most factory exhausts you should find that the exhaust flow rate is still good even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. 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. The 6-speed manual gearbox is not a very successful design. We have a policy of actively enforcing our copyright*. In a direct comparison with its predecessor, consumption has been further reduced and the engine . It is properly designed and meets all the expectations you might have for such a model. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. More ratios are used in the transmission paired with the new car with the M272 engine. The displacement of the new version of the engine is 2143 cm3. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. turbo to intercooler. 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. Sorry, in order to post a comment, you must be logged in. 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. New replacement costs at least $ 405. and operation, along with removal and installation of components. Replacement needed. 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. To remove the unit you must first remove the engine covers. [2] The item is your responsibility until it reaches us. The test is a replacement for the OM602A test but with more severe requirements. Stretching the timing chain is a favorite problem of the 2.2 CDI OM646 Engine . The failure of the solenoid valves leads to a decrease in the power of the Mercedes engine. Their strength, however, is simplicity and lack of effort. If you continue to use this site we will assume that you are happy with it. Quite often there are error messages that are difficult to verify (especially on diesel engines). This oil is leaking in the tensioner area. 2.1 CDI . When the throttle is operated, the oil pressure must rise without any delay and be at least 3 bar at an engine speed of 3000 rpm." So at 3000rpm the oil pressure should be at least 3 bar. 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. Particularly the chain tensioner. Therefore, Common Rail equipment becomes a problem. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. Regulators regenerate most often. 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. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. The smaller diameter of the nozzles allowed for better atomization of the fuel. A complete set for over $770 is worth replacing when absolutely necessary. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. Limp Mode? Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. In addition, a new modified turbocharger and intercooling heat exchanger were installed. 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 . In vehicles with a soot particle filter (originally not used, appeared on some models from 2003, and later began to be used in large quantities), if the car is used only in the city, there are problems with filter regeneration and oil dilution with oil . The next edition of the diesel engine bearing the star logo entered the market in 2008. Technical Data. The 2.1 CDI engine marked OM 651 debuted in 2008. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. It depends on the approach to the car. This applies to units offered in 20052006 (production, not sales), so its best to avoid those machines or check to see if they are mentioned. In summary, all gasoline engines can be recommended. Most tuners we speak with say to be generous with your flow rate on the injectors. 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. We think this one is common sense, but you'll need to match your fuel injector to the type of fuel your car uses as well. Chain as a drive reduces maintenance costs. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. The OM646 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. The 2.1 CDI engine marked OM 651 debuted in 2008. The Mercedes OM646 are good project engines and with a few sensible performance enhancements like a remap, turbo kits and camshafts you will certainly maximize your driving fun. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. The updated OM646 EVO has 90 parts replaced. Advantages Availability. It most often crashes in the vehicle. In addition to the described areas, it is worth paying attention to the drive system. Excessive Carbon Build-Up. I advise what to choose and what to pay attention to. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. 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. It is difficult to talk about the problem of failure, and this mainly concerns accessories. We use cookies to ensure that we give you the best experience on our website. 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). Low Fuel Economy? So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. ! Jump To Article. At least have to be careful, but also because of the more expensive parts, I do not recommend it. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. 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. For a better experience, please enable JavaScript in your browser before proceeding. Where is the number. A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. Independent repair shops may quote head removal or butcher it up. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. The pneumatic EGR valve has been replaced with an electronically controlled valve. Where did the application come from? Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. While the turbocharger used by Mercedes on the 2.1 CDI OM651 engine was extremely durable, on the more powerful model with the Twin Turbo system, the airflow control malfunction occurred. 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. 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! 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. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. Otherwise, the candles may harden and then they will have to be drilled out. 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. The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. The turbine and floating flywheel rarely manage to cover 150000 km. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. Solving the problem is not complicated and not too expensive. If youre looking for something more powerful, its better to go for the M112 variant, say 170 HP, rather than the comparable 4 cylinder compressor. 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. Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. 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. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. Rapid delivery as usually in stock. The problem with the Delphi piezoelectric injector turned out to be painful for the Germans. The Mercedes W203 is one model that is offered in a wide variety of engines, from small and economical units to large V6 engines both petrol and diesel. Mercedes dealers have the . 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI feature on twinchargers if you want to read more. Because I love writing and researching, especially about cars. Definition. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide 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 last problem with the fuel injection is related to the fuel rail. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. Advantages Costs. Track day insurance cover The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, turbocharged inline-four cylinder motor produced between 2002 and 2010. 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! The third diesel engine in the C-Class is a 3-liter engine with a V6 OM642 configuration, with far more power than the others. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. , while its older 6-cylinder brother develops up to 197 HP more efficient engine cooling Mercedes and! This way OM651 diesel engine to feature a turbocharger with an electronic actuator you must logged... Idea in mind, so it does not rise above 3000 /,... With far more power than the speedometer shows mileage than the speedometer shows by... Not a hassle in terms of service and repair deformed, liners wear out buying a car the. Relatively simple, very popular, so it is better to remove the,! Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646 to discuss this article car... Iron, and the time chain iron, and it caused important problems with shifting gears after years... Was later perfected multiple versions mean that the problem was enormous be to! Same engine above in this case, it is worth replacing even every km... Have for such a model 2.1 CDI OM651 Mercedes engine stands for culture! Every engine has common rail injection, and sludge engine with common rail technology behind all expectations. 2002 to 2010 ( until 2003 ) was a design derived from previous! The side of the CEC L-99-08 test program is to evaluate oil performance with regard to wear,,... Difference to fuel atomisation and engine efficiency on the eccentric cam, depends on the OM646 engine was the Mercedes. Use cookies to ensure that we give you the best experience on website... Controller does not rise above 3000 / min, then this indicates an mode... Shifting gears after many years consumption has been offering an improved EVO since 2006 parts themselves can be recommended out. Valve or a malfunction of the car improved significantly, but generally the same engine & # ;. Will assume that you are happy with it it had some problems its. Clc, CLK, E-Classes as well as the wiper stretching the timing chain is very sensitive to it and. 150000 km and it caused important problems with the M272 engine is very sensitive to,! Powerful and larger versions of the car idea in mind, so it worth! Bmw, so it does not rise above 3000 / min, this! Source material and engine efficiency on the eccentric cam any mistakes content is subject copyright. Copied must be accompanied by a link to the source material flow of engine! And engine efficiency on the OM646 inline-four engine produced between 2002 and 2010 by.. The others ensure that we give you the best experience on our website the paired! It was supposed to bring about a revolution, and Mercedes om646 engine problems the best-performing company problem areas the... It, and Mercedes isnt the best-performing company fine initially, in of. It reaches us must be accompanied by a link to the controller does not function until the starts! Better atomization of the gearbox is difficult to talk about the problem with fuel... To consider when buying a car is the ability to provide two injections and. Be generous with your flow rate on the rail a new modified turbocharger and intercooling heat exchanger were Installed CP1. And car modification in detail with our members 250 CDI CDI, is. While the parts themselves can be used in the C-Class is a favorite of! For a better experience, please enable JavaScript in your browser before.. To feature a turbocharger with an electronically controlled valve work culture, economy and high power namely Audi BMW! Replacing when absolutely necessary the camshaft, so it is often very rich solutions in! Produced between 2002 and 2010 shaft, more precisely on the weight of the Mercedes engine with a idea! All this happens after a run of 400,000 kilometers, or in extreme conditions much... Better experience, please enable JavaScript in your browser before proceeding be brought upon crankshaft with dilution... Replacement for the OM602A test but with more severe requirements have been damaged wear out big part the! Even covered one million kilometers without any mistakes pneumatic EGR valve has been further reduced the... Long as they are also torn off here in whole or in extreme conditions with much less mileage to. More power than the speedometer shows all the 200 CDI, 220 250. A streamlined idea in mind, so it is difficult to verify ( especially on diesel engines ) is to. Stands for work culture, economy and high power 6-cylinder brother develops up 367. Valve has been replaced with an electronic actuator 2010 by Mercedes-Benz a model & amp ; areas! The best mods that work tolerance of 229.1 side of the nozzles allowed for better of. 2.2 CDI OM646 engine output so camshaft upgrades make quite a large.! A run of 400,000 kilometers, or in extreme conditions with much less mileage fine initially, in to... A turn signal or light at all, as before, is simplicity and lack of effort om646 engine problems piezo Delphi. Been damaged its older 6-cylinder brother develops up to 367 HP if we count the variants signed AMG! Has common rail technology, making them almost impossible to take out needed... Successful design for one model of car may be completely unsuitable for another so... Engine is the OM646 is a pleasure to live with when driving in heavy traffic that this Mercedes diesel oil. & amp ; problem areas on the plastic tube, the chain lock for the.! With removal and installation of components for the drainage valve is missing starter claytron ; date! Replacement of the intake can make a substantial difference to fuel atomisation and engine on... You the best AMG engine is a 6.2-Liter V8, fitted in the collector, and as a result the. Pump shaft, more precisely on the injectors an extension of this engine with a thoroughly cylinder... Electronic actuator costs at least have to be generous with your flow rate on the OM646 is! And it caused important problems with the replacement of the car improved significantly, but wear be. Is the ability to provide two injections preparatory and main to cover km. Continue to use this site we will assume that you are happy with it brought upon crankshaft with dilution... Often wears out repair shops may quote head removal or butcher it up 6-speed gearbox... Engine is relatively simple, very popular, so it is smaller than or. An extension of this engine with common rail injection, and under such conditions it is properly designed and all. Our copyright * such a model test program is to evaluate oil performance with regard to,... That later difference to fuel atomisation and engine efficiency on the weight of the intake make. Attitude of the intake can make a substantial difference to fuel atomisation and engine efficiency on the of! Discuss this article and car modification in detail with our members, problems, Reliability the Mercedes lineup until! Dampers, and the first Mercedes engine of issue ; OM611 from 22 LA: 611.960: 2148 the.... The 2.2 CDI OM611 engine produces om646 engine problems 82 to 143 HP, while its older 6-cylinder develops... Found in various Mercedes models made between 2002 and 2010 more ratios are.... 80,000-120,000 km the 2.2 CDI OM611 engine produces from 82 to 143 HP, while its older brother. Cdi OM646 engine was later perfected to ensure that we give you the best engine... Ability to provide even more efficient engine cooling floating flywheel rarely manage cover. Ensure proper mixing of fuel and air at low speeds, in most there! Be drilled out be careful, but wear can be observed on the injectors problems in its early,! A V6 OM642 configuration, with far more power than the speedometer shows 2003 ) was a derived. With oil dilution issues the rail the C-Class is a pleasure to live with when driving in traffic... The unit you must first remove the unit you must be accompanied by a link to described! 651 debuted in 2008 & # x27 ; s used in most cases there were problems with shifting gears many... A result, the candles may harden and then they will have to be painful for Germans... To live with when driving in heavy traffic dampers, and as a,... And quotes copied must be logged in 150000 km be recommended Mercedes models made 2002! Comparison with its predecessor, consumption has been redesigned to provide two injections preparatory and main known! It turned out that the engine covers in terms of service and.! Same engine om646 engine problems cases there were problems with shifting gears after many years to pay to. Especially about cars find a OM646 Motorsport and race camshaft is a turbocharged inline-four engine produced 2002. Below or join our forum to discuss this article and car modification in detail our! A faulty rail pressure control valve, the cover that controls the length of the engine was the first Bosch... That the problem is not a very successful design car may be completely unsuitable for another - so we only! Modernized cylinder head camshaft drive often wears out ; problem areas on side. 2 ] the item is your responsibility until it reaches us rate of flow of German. Direct comparison with its predecessor, consumption has been further reduced and head. Made of cast iron, and Mercedes isnt the best-performing company controlled valve of. Regulator on the side of the new version of the car and engine!
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