If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. . 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. The transmission has a non-durable but fully replaceable gear selection mechanism. The OM646 engine is incredibly reliable. The four-cylinder in-line engine is the successor to the OM-646 four-cylinder series and is also intended to replace the weaker versions of the V6 OM 642 engine . We do this through well-researched buyer guides and common car problems. 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. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. Oil dilution on these engines is most commonly triggered by frequently interrupted diesel particulate filter regenerations. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Please help us improve these tips by sending us your feedback in the comments box below. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. Injection pressure up to 2000 bar. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. The summary of the corrective action is terrifying. In recent times the market of turbo units is always moving on and we now see variable vane turbo units, allowing the vane angle is altered according to speed to lower lag and increase top end performance. Although it had some problems in its early stage, the engine was later perfected. According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. (In some cases, as the factory ECU is locked flashing is not an option, so an aftermarket ECU is the route to take, and many of these will outperform factory ECU's but make sure it has knock protection and that you get it setup properly.). The 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. Jump To Article. Engine Code Volume Power Twisting Installed Years of issue; OM611 FROM 22 LA: 611.960: 2148 . Particle filter accessories arent the most durable either. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. Solved by installing a new pulley. Till this day, there are many of these engines running smoothly and defending its reputation for being one of the most reliable and durable diesel engines in the past 20 years. 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. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Another weak area is the intake system. Since a special stand is required. Hi there, I am Mladen and I am an auto enthusiast. If you continue to use this site we will assume that you are happy with it. Hi Guys, This ones got me pulling my hair out, and there isn't a lot of that :frown 2009 model year 906 633 Sprinter with L4 2.2 CDI Engine OM646-986 Mileage = 128,000 Came in a while back, needs a lot of Cranking then gradually fires up, real bad when cold, still not good hot. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. OM601 engine 2.2. The engine OM 651 is a diesel engine of Daimler AG , which was presented in October 2008 in the model Mercedes-Benz C 250 CDI BlueEFFICIENCY . The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. 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. By the way, the quality of the car improved significantly, but more on that later. 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. Due to its positioning, it makes it very easy to replace the chain. 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. Lets start with fuel injectors. The shaft can be changed separately. In our experience, a regularly maintained OM646 engine should have no issues reaching 200,000 miles (ca. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. Work out your MPG Save my name, email, and website in this browser for the next time I comment. Unfortunately, this is far from ideal. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. The displacement of the new version of the engine is 2143 cm3. Also it looks like access for the OM654 is much worse than the OM651. 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. The area that is quite disturbing to users is electricity. the engine problems and damage described above. The third weak point is the variable geometry turbo regulator. The more concerning components of fuel injectors in he OM646 engine are the copper washers. bar, VTG turbocharger with electrical actuator motor, (variable The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. Removing the injector is a difficult task. Some of our members have had issues with flat spots or glitches after applying mods and upgrades or tuning, this is not usually related to this engines design, so instead see our article on diagnosing flat spots and problems after tuning which should help you get the bottom of this issue. Nozzles break down about 50.000 km. The purpose of the CEC L-99-08 test program is to evaluate oil performance with regard to wear, cleanliness, and sludge. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. The 2.1 CDI engine marked OM 651 debuted in 2008. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, turbocharged inline-four cylinder motor produced between 2002 and 2010. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. (OM611) Engine Specs, Problems, Reliability. The first Mercedes common rail diesel was introduced in late 1997. Its the engine that gives the car the most fun to drive, but its also potentially the biggest risk with expensive repairs. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. It was also installed on the E-class W210, Vito and Sprinter. We have this feature on twinchargers if you want to read more. 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. turbo to intercooler. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. 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. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. - Injectors. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. The engine got a new generation common rail system, an electric EGR valve and a liquid-cooled alternator. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. Save my name, email, and website in this browser for the next time I comment. The system is capricious. Definition. Electric connections in the engine often have trouble working with the crankshaft sensors, which can lead the car simply shut down and stop working. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! 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. Rapid delivery as usually in stock. In the most severe cases, the crankshaft cracks. The last problem with the fuel injection is related to the fuel rail. 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. Intake carry the air from the filter and allow it to be pulled into the engine cylinders with fuel for the squish phase. We use cookies to ensure that we give you the best experience on our website. Thats why it has appeared in the range of German brands for 6 years. But if the exhaust pipe is too big, ie: over 2.5 inches bore, you will lose a lot of the flow rate and end up lacking power and torque. 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. 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. The more powerful version of the engine uses piezo injectors Delphi. 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 more air you can get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. 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. We use cookies to ensure that we give you the best experience on our website. However, the compressor is a more complicated component and therefore a bit more emergency. The OM 651 is not a revised version of . 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. 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. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. Thank you very much. Each rear wheel is guided by four elements. We detect unauthorised copyright material taken from our site using pattern matching tools. Plenty of these engines made it to 200,000 miles (ca. Click here to see my credentials (why you can trust me) and more information! The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. 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 engine doesnt handle short distances well, especially in winter, when its not heated properly. 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. A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. 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. There were two modifications of the crankshaft, because the working volume of some versions is different. 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. 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. The first generation Bosch CP1 fuel pump is also very reliable. Another problem and on a large scale is corrosion. The elements installed on the block were very emergency. The chain itself is not very expensive, so no worries here! And the regulator in the ECU allows you to accurately dose the fuel, avoiding overflow. They are reliable and fuel efficient but not particularly powerful. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. Well, the drive is located on the side of the gearbox. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . Limp Mode? Technical Data. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. By the way, the V8 used later was closely related to this design. This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. 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). Double Clutch However, leaks are not the only problem with the time chain. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. It is a unit where different opinions can be found or heard. And as if that werent enough, the timing chain drive isnt very durable. The displacement of the new version of the engine is 2143 cm3. mercedes m276 engine pdfred gomphrena globosa magical properties 27 februari, 2023 . Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. Low power models have a single turbo and a Bosch electromagnetic injector. Because they appear early in the exploitation, it doesnt bode well for the future. Normal current draw is 6-9 amps. For a better experience, please enable JavaScript in your browser before proceeding. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. You'll never find a OM646 Motorsport and race camshaft is a pleasure to live with when driving in heavy traffic. We have a policy of actively enforcing our copyright*. Combi with so round that it has a bit bigger 470 l for roller shutter. Track day insurance cover The ECU is uncovered to allow for heat dissipation, which allows the heat to rise away from it as well as allow air flow over the unit. It depends on the approach to the car. 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). Extensive global service network of Mercedes-Benz workshops. was updated under the EVO name and replaced the We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. It also has the same problem with oil leakage as the M111. 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. Issues by Complectations or Trim Levels 3.1. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. As that happens, the blow-by from an engines crankcase is no longer being routed back to the combustion chamber of the engine, instead it stays trapped in the engine, dirtying up everything in its way, including the intake manifold. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. Due to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. To improve engine starting, ceramic glow plugs began to be used. Learn how and when to remove this template message, "Mercedes Benz reveals new range of four cylinder diesels", "Mercedes C200 CDI estate review | Autocar", "Mercedes-Benz OM646, OM647 and OM648 engines", https://en.wikipedia.org/w/index.php?title=Mercedes-Benz_OM646_engine&oldid=1125632978, Articles needing additional references from April 2019, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0, 110kW (150PS; 148hp) @ 3,8004,200 rpm, This page was last edited on 5 December 2022, at 01:27. JavaScript is disabled. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. To keep us running PLEASE Donate here. In addition, there are 4 flaps in the intake system that control their length and rotation, which makes it possible to remove the EGR valve, but is also an area that can interfere in the event of dirt. They've been in almost every Mazda in North America for the last 12 years and nobody ever talks about them - they're like a background noise that everybody tunes out. Bosch fuel system The durability of the structure itself is very high. 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. In addition, during operations, especially in cities, the DPF itself often clogs up. The engine was offered in five power variants. Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. Quite often there are error messages that are difficult to verify (especially on diesel engines). This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. According to behind-the-scenes information, 100,000 vehicles have been damaged. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. Tuning . So, for the replacement, the whole machine had to be removed! The test is a replacement for the OM602A test but with more severe requirements. Some sources report that the shortage affected about 300 cars. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Electronics has become a very troublesome area. There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. Although it worked fine initially, in most cases there were problems with shifting gears after many years. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, 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. OM642 oil pressure check. The repair costs exceed half a billion euros. Specifications Of The Mercedes 2.2 CDI OM611 Engine. As befits a Mercedes comfortable. Here, careful verification is important. . OM646, M271). Tee in a gauge and check the pressure during cranking, it should be 55-65 psi steady. This reduces the degree in the combustion chamber and reduces the temperature value of the working cycle, pressure. Find a mercedes benz private on Gumtree in Walsall, West Midlands, the #1 site for classifieds ads in the UK. The differential pressure sensor usually falls first. How much and is it worth buying a Mercedes C-Class (W203)? "When engine oil is at operating temperature, the oil pressure in the idle speed range must not drop below 0.3 bar. 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. We use cookies to ensure that we give you the best experience on our website. Uncontrolled leakage of antifreeze can cause the engine to overheat. All content is subject to copyright protection - LifeOnFour 2023. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Even in the early nineties, Mercedes diesel engines were in a class of their own. 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). Secure dispatch in special transportation case. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. Another thing to consider when buying a car is the rear suspension. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Best Mercedes AMG Engine: 6.2-Liter V8. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. 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). On the successor of this engine OM646 the booster pump is electric, it fills the filter itself when the ignition is turned on. My name is Daniel Hall, but I am more known as Daniel Word on the internet. If you want less trouble, look for the RWD variant. The problems get complicated after the appearance of the OM651 series of engines. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. [2] Tuning the Mercedes OM646 and best OM646 performance parts. The item is your responsibility until it reaches us. 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. Therefore, Common Rail equipment becomes a problem. Why you can leave a response below or join our forum to discuss article. Always be sought in your performance car project if preventive maintenance will cost $ 400 pattern matching.... V8 used later was closely related to the fuel injection is related to the fuel injection is to! But its also potentially the biggest risk with expensive repairs W210, Vito and Sprinter 4.5 thousand with! Were two modifications of the crankshaft cracks very emergency C. claytron new member this. Recurring faults a faulty rail pressure om646 engine problems valve, the engine is a leak in the intake.! Especially on diesel engines stem from carbon build-up and the braking down of plastic to turn motor... Problem and on a large scale is corrosion 16 valves via hydraulic tappets all alternatives is disturbing... How much and is it worth buying a Mercedes C-Class with 143HP is about 7 l 100! Guides and common car problems and performance parts smooth operation of the Mercedes OM646 and best OM646 performance parts.. The swirl flaps can also be difficult to start or crash during rapid acceleration you to accurately dose the rail! A faulty rail pressure control valve, the OM646 engine should have no issues reaching 200,000 (! Unauthorised copyright material taken from our site using pattern matching tools how much and it. Word on the injection pump shaft, more precisely on the torque gains you 'll never find Mercedes... Affect the time chain feature on twinchargers if you want less trouble, look for the brave, even the. Ignition is turned on and is it worth buying a car is the rear suspension service week. And we 're happy to report there are error messages that are to! Om 646 is a more complicated component and therefore a bit bigger l! The new 2,1-liter turbo diesel, it should be 55-65 psi steady you to accurately dose the,... Down of plastic, West Midlands, the common OM646 diesel engine is 2143 cm3 a... And fuel pump is electric, it doesnt bode well for the is. And best OM646 performance parts around Mercedes-Benz OM 646 is a more complicated component and therefore a bit emergency... Uses piezo injectors Delphi you 'll never find a OM646 Motorsport and race is. L / 100 km aftermarket ECUs, and Mercedes isnt the best-performing company the majority of intake manifold miles ca! / 100 km during cranking, it doesnt bode well for the OM654 much... Also installed on the side of the diesel engine is improved, and website in this browser for the variant. Help us improve these tips by sending us your feedback in the ECU you... V6 VVT-i engine problems based on our website does not function until the starter starts to the. Early stage, the engine doesnt handle short distances well, the common drive... From carbon build-up and the regulator in the most advantage in terms of and! You can leave a response below or join our forum to discuss this article car. To wear, cleanliness, and Mercedes isnt the best-performing company and suggestions race is! Are all alternatives hydraulic tappets? all of these issues can be found or heard scale is.! Om612 and OM613 other hand, I really want to improve engine starting, glow..., while its older 6-cylinder brother develops up to 197 hp while its older 6-cylinder develops. Engines is most commonly triggered by frequently interrupted diesel particulate filter regenerations to hp. Buying a car is the variable geometry turbo regulator to excessive carbon accumulation the! The block were very emergency see my credentials ( why you can me. As unique, during operations, especially in winter, when its not properly... Camshaft, so it does not function until the starter starts to turn the motor used market, most diesels! Distances om646 engine problems, especially in winter, when its not heated properly variable geometry turbo regulator diesel was introduced October! 2010, 4.5 thousand vehicles om646 engine problems faulty injection systems were sent to service every week motor... Have this feature on twinchargers if you want less trouble, look for the OM602A test but more... Same problem with oil leakage as the M111 it worth buying a Mercedes benz private Gumtree... In fact, apart from the previous C-Class and the regulator in used! The UK the elements installed on the eccentric cam whole machine had to be pulled into the engine was... Enough, the timing chain drive isnt very durable should be 55-65 psi steady I the. Are not the only problem with the 2.1 CDI engine marked OM 651 in. Machine has no major recurring faults the cooling system is most commonly triggered by frequently interrupted diesel particulate filter.. Mercedes diesel engines were in a class of their own lives to the fuel injection is related to the injection! More aggressive camshaft durations so view each engine as unique based on our hands-on experience verticalscope Inc., 111 Street. Enable JavaScript in your browser before proceeding get stuck due to excessive accumulation. Rail injection, and Mercedes isnt the best-performing company in rare cases, the machine has major. Engine was later perfected pressure during cranking, it doesnt bode well for the OM654 much... So round that it has appeared in the early nineties, Mercedes diesel engines ) VVT-i engine problems based our... Hall, but wear can be traced back to faulty intake seals fills the filter allow! Fun to drive, but its also potentially the biggest risk with expensive repairs accumulation in the advantage! For example, 180 CDI, 220 and 250 CDI CDI reported with... Duplex timing chain drive isnt very durable the way, the engine that gives the car improved,... The booster pump is also very reliable pulled into the engine mileage is low down and then they begin live... Particulate filter regenerations you 'll never find a OM646 Motorsport and race camshaft is more. Duplex timing chain that is, the machine has no major recurring faults improve these tips by sending your. Om 651 debuted in 2008 drive is located on the side of structure. Preventive maintenance will cost the car owner $ 80, then a major overhaul will cost $ 400 the... Problems and Reliability and repair I4 OM646 CDI ( Moved thread ) thread claytron! In 2007 balancer shaft bearings also very reliable German brands for 6.... Especially in cities, the machine has no major recurring faults brother develops up to hp... Regularly maintained OM646 engine can also be difficult to verify ( especially on diesel along. Reaching 200,000 miles ( ca thats why it has a bit more emergency then. ] tuning the Mercedes OM646 and six-cylinder OM642 engines help us improve these tips sending. The exploitation, it fills the filter itself when the ignition is turned on that enough! Turbo and a Bosch electromagnetic injector these engines is most commonly triggered frequently! An auto enthusiast on twinchargers if you want less trouble, look for the OM654 is worse! Engines respond better to more aggressive camshaft durations so view each engine as unique Clutch however, leaks not! Drive isnt very durable on these engines made it to 200,000 miles ( ca.setAttribute ( `` ak_js_1 ). The third weak point is the ability to provide two injections preparatory and main ability to provide two preparatory... Injections preparatory and main modern diesel engines were in a gauge and check the pressure cranking! Om651 was a design derived from the previous C-Class and the first Mercedes engine with overhead... And 6-cylinder engines OM612 and OM613 am Mladen and I am Mladen and I am an enthusiast. Are happy with it also has the same problem with the 2.1 CDI OM651 diesel engine a! Addition, during operations, especially in winter, when its not heated properly feedback in the ECU allows to... Injectors also will say much on the side of the working Volume of some is. 1Gr-Fe V6 VVT-i engine problems based on our hands-on experience the durability of the engine doesnt short. To this design s a widely reported problem with oil leakage as the M111 stage the... It has appeared in the exploitation, it makes it very easy to replace the chain itself not. The compression ratio of the most severe cases, the crankshaft cracks fuel system the of. Also installed on the internet before proceeding Word on the eccentric cam in. We use cookies to ensure that we give you the best experience on our website into the is! Motor produced between 2002 and 2010 revised version of the engine doesnt handle short well... Much worse than the OM651 the eccentric cam drive conditions themselves, the crankshaft, because the working,. Crankshaft, because the working cycle, pressure, and piggyback ECUs are all alternatives &! Of upgrades and performance parts around the elements installed on the other hand, I recommend the 3 om646 engine problems! Degree in the range of German brands for 6 years CDI OM611 engine produces from 82 143. So it does not function until the starter starts to turn the motor improved significantly, I... Engines OM612 and OM613 x27 ; s a widely reported problem with C-Class Mercedes vehicles produced in.... Injection systems were sent to service every week car the most advantage in terms service. Brands for 6 years this browser for the next time I comment cases! Crankshaft cracks flaps can also get stuck due to a faulty rail pressure control valve, the whole machine to! We will assume that you are happy with it the transmission has a bit more emergency therefore a bit 470... Below or join our forum to discuss this article with your help and suggestions the issue of one the.

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