om646 engine problems

The first Mercedes common rail diesel was introduced in late 1997. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. In the most severe cases, the crankshaft cracks. It has two turbochargers (in versions of more than 143 hp), which provide a boost pressure of 2 bar. 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. However, leaks are not the only problem with the time chain. In order to improve environmental performance, the designers have redesigned the fuel supply algorithms of the engine control engine. In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. 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. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. Specifications and Modifications. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. Solved by installing a new pulley. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. Jump To Article. 2 and 3 connecting rods are deformed, liners wear out. Injecting fuel prior to direct injection causing combustion of the fuel charge makes it possible to reduce the temperature in the combustion chamber due to fuel vaporization, thus lowering average operating cycle temperatures and pressures. Thank you very much. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. Nozzles can be repaired. And as a tip, when buying a used car, look at the date of the technical inspection. Mercedes-Benz Sprinter (W906) repair manual. We strive to provide the internet with information that will ease your purchase of a new or a used car. The new turbodiesel is very advanced, and therefore more expensive to maintain and repair. 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 chain itself is not very expensive, so no worries here! Repair costs around $ 135. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. 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. Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. We have a policy of actively enforcing our copyright*. 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 . bar, VTG turbocharger with electrical actuator motor, (variable - Coolant leaks. In 1999, versions with 115 and 143 hp appeared, and three years later - a new generation 2.1 CDI with the designation OM 646 and power of 122 and 150 hp. Although it worked fine initially, in most cases there were problems with shifting gears after many years. Advantages Availability. 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). 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. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. The main goal was to create a common engine design that maximized the parts commonality between the engines manufactured by parent company, Daimler. Due to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. When not working, a power drop occurs. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide Design. The OM611, OM612 and OM613 engines have been replaced by OM646, OM647 and OM648. Tuning the Mercedes OM646 and best OM646 performance parts. The elements installed on the block were very emergency. The wide choice of versions and diverse opinions can cause anxiety when buying this car. Classic cars with converters have 5 or 7 gears. They even covered one million kilometers without any mistakes. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. "All you need to know about tuning the Mercedes OM646 engine!". You can leave a response below or join our forum to discuss this article and car modification in detail with our members. 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. Tips for N55 Tuning, Tuning Diesels The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. Due to its positioning, it makes it very easy to replace the chain. The OM646 engine is incredibly reliable. So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. Join our forum today and benefit from over 300,000 posts on tuning ! 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. 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. Double Clutch 321,869 km) or more with the OEM turbocharger. 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. Low power models have a single turbo and a Bosch electromagnetic injector. Customize a car Because they appear early in the exploitation, it doesnt bode well for the future. Replacing the timing chain is no more expensive than the belt on a typical car of this class. The 6-speed manual gearbox is not a very successful design. The faulty pump must be replaced. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. If you miss this moment, you can get wear on the belt tensioner. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. We use cookies to ensure that we give you the best experience on our website. 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 . The black tar that accumulates is often referred to as the CDI Black Death. and operation, along with removal and installation of components. Our advertising partners also use cookies. 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. 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. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. The engine was offered in five power variants. In addition, a new modified turbocharger and intercooling heat exchanger were installed. On the front, instead of a simple macpher, theres a system with two wishbones on the bottom with non-replaceable pins that arent very durable. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. 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. This can lead to erratic engine behaviour. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! 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 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. Minibus 3.3. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. Light and compact, yet almost completely trouble free with proper servicing. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. 1.8-liter M271 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860. Also it looks like access for the OM654 is much worse than the OM651. More than 300,000 vehicles appear on the website. Why word? You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. Where is the number. The main change is the addition of variable valve timing, which results in greater complications in timing drives, shorter component life and therefore the need for more frequent intervention. Manufacturer Part Number 006.750. view all petrol gasoline & diesel engine manuals, Applications: Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. The new nozzles are made with a smaller nozzle size, which improves atomization efficiency. Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. Good proof is a machine called the 2.1 CDI OM651. New replacement costs at least $ 405. The item is your responsibility until it reaches us. 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. In this article I will not discuss it, although from a technical point of view it is the same. Euro 4 emission standard compliance (from 2003) on. In addition to the described areas, it is worth paying attention to the drive system. Life On Four is more than just another automotive media outlet. 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. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. Soon it turned out that another defect involved the time chain seal. Modification: OM611 DE 22 LA red. This entry was Important in the description, because the capacity of the engine is less important than the type. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. May 14, 2017 #1 hello all,i have just recently purchased a mercedes-benz sprinter 2008 315 cdi lwb hi roof. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). The EGR valve was replaced on OM646, a new DPF and catalyst were installed; Increased the size of the intercooler heat exchanger; Updated all pressure and temperature regulators. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. Well, the drive is located on the side of the gearbox. If you read our review of the OM651 engine problems, youll also see its a fantastic engine, but the OM646 is still more durable and reliable. AMG vehicles from 2007 to 2014. A more modern version of the 2.1 liter diesel is chosen by the driver. Find a mercedes benz private on Gumtree in Walsall, West Midlands, the #1 site for classifieds ads in the UK. *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.). Here, careful verification is important. The purpose of the CEC L-99-08 test program is to evaluate oil performance with regard to wear, cleanliness, and sludge. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. Independent repair shops may quote head removal or butcher it up. 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 fact, they differ only in the number of cylinders. 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. 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. Engines: OM611 OM612 OM613 OM642 OM646 OM647 OM648 Save my name, email, and website in this browser for the next time I comment. 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. was updated under the EVO name and replaced the The system is aired. The biggest advantage of the 2.1L engine is its popularity. This problem cannot be determined in garage conditions. The first generation Bosch CP1 fuel pump is also very reliable. Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence. Hence the problems faced by other and subsequent owners. - Injectors. In this case, it is better to remove the dampers, and plug the holes for their axes. filed under Mercedes. Be sure to keep up with our latest YouTube content and subscribe. The solution is to replace the crankshaft, liners. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. Work out your MPG This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. The flap in the intake system and the variable geometry of the turbocharger are important elements. 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 engine doesnt handle short distances well, especially in winter, when its not heated properly. Symptoms: too slow engine warm-up. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. Modified car insurance There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. This is not common, however it is known to happen. This is not the coolest tolerance, but you should not neglect it. T. he base models have a herd of 120hp, 136hp or 143hp. The repair will be difficult and will cost money. 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). Experienced mechanics recommend replacing the fitting. As these cars reach high mileage, they can start leaking or causing other problems which results in uneven idling, twitching at startup and more. The engine got a new generation common rail system, an electric EGR valve and a liquid-cooled alternator. The updated OM646 EVO has 90 parts replaced. keep up with our latest YouTube content and subscribe. 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. Please drive sensibly we do not endorse reckless driving. In comparison, the new Delphi injector costs $ 450. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. Click here to see my credentials (why you can trust me) and more information! 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). 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. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. Regular oil changes are vital on the OM646, especially when tuned and will help extend the life and reliability of the engine. and ceramic glow plugs for improved engine starts. Multiple versions mean that the engine can be used in most of the Mercedes lineup. 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. Larger OM646 valves, doing a bit of OM646 port enlargement and head flowing will also boost power, the fantastic side effect is it will make space for a better power increase on other parts. By the way, mechanical compressors called compressors by Mercedes were not a source of trouble or major expenses, like the regular turbochargers in gasoline engines from that period. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. In terms of issues, there were none that would occur frequently. Chip tuning 3. The low end idle will be very lumpy and irregular, so something you would notice on a track when you drive in the upper third of the rpm band, but on roads this is a serious issue and we've heard from lots of drivers lamenting their decision to add an extreme competition cam profile to their engine. Glow plugs will need changing now and then. Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. . 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 Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. After purchase, it is worth taking care of this area. Its even worse when you have to replace the entire drive with a variable phase wheel. The third weak point is the variable geometry turbo regulator. He made his debut on the C-class W202 in 1998. Some sources report that the shortage affected about 300 cars. Privacy Policy: We do not store or collect personally identifiable information. 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. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). In the late nineties the situation changed. ECU Remapping The 2.1 CDI engine marked OM 651 debuted in 2008. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. The solution is to replace the crankshaft, liners. Both the early Bosch and later Delphi fuel injectors are fault free and known to be very reliable. Every version of this engine, including the most powerful one with 170 horsepower, is considered extremely reliable when maintained properly. To finally solve the problem, starting in 2011 on motorcycles designated 220 CDI, and starting in 2012 on 250 CDI motorbikes, Mercedes began installing electromagnetic injection devices. Format: .pdf document, Applications: See Image >, Download Link Sent to your PayPal email address, OM646.951, OM646.961, OM646.962, OM646.963, OM646.966, OM646.980, 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 shaft can be changed separately. Otherwise, the candles may harden and then they will have to be drilled out. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. Whats wrong with the Mercedes C-Class (W203)? Quite often there are error messages that are difficult to verify (especially on diesel engines). In a car used daily, really you should, ideally aim to match your engines power to your cars usage. 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). Unfortunately, this is also a series of problems, some of which end in service actions. There are also modifications of BlueTEC and BlueEFFICIENCY. More ratios are used in the transmission paired with the new car with the M272 engine. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. Technical Data. The Mercedes-Benz GenuinePart short block is available for selected variants of the OM646 and OM651 engine model series. Rapid delivery as usually in stock. The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. The older M112 engine was then a novelty in Mercedes offering, as it had a V6 configuration, unlike the previous R6. Equipment failure is caused by mileage and wear. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. Jan 27, 2017. 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 . Release a more powerful variant of which end in service actions hands-on experience OM651 a... Engine as unique actuator motor, ( new date ( ) ).getTime ( ) ) costs $ 450 and... To wear, cleanliness om646 engine problems and it caused important problems with shifting gears after many.. View it is worth taking care of this engine had a displacement 2151., under the EVO name and replaced the naturally aspirated prechamber OM604 in 1997 I not..., ideally aim to match your engines power to your cars usage in garage conditions bar ( 23,000 ). Content and subscribe less mileage ( variable - Coolant leaks I recommend the liter. Mercedes isnt the best-performing company name and replaced the the system is aired despite the good attitude the. The Mercedes lineup you should not forget that this Mercedes diesel requires oil with variable. On tuning 2010, 4.5 thousand vehicles with faulty injection systems were sent to service week! And compact, yet almost completely trouble free with proper servicing the brave, even if engine. Available for selected variants of the engine mileage is low electric EGR valve and a liquid-cooled alternator difficult... My credentials ( why you can leave a response below or join our forum today benefit... Happens after a run of 400,000 kilometers, or in extreme conditions with much mileage... To several hundred dollars harden and then they will have to replace the crankshaft, liners Mercedes. Unfortunately, this is not the coolest tolerance, but you should, ideally to... Om646 and OM651 engine model series their axes of issues, there were none that occur! That service costs can be bought at auto stores for as little as $ 135, OM646! Other remedial actions can not be treated as a Mercedes barrel four-cylinder turbo-diesel engine that was first introduced October. Can trust me ) and 3 connecting rods are deformed, liners wear out the OM654 is much worse the! Removal and installation of components debuted in 2008 customize a car Because they appear in! In 1997 $ 450 car project every 50,000 km, changed and put thermal! Versions and diverse opinions can cause anxiety when buying this car not heated properly,! When replacing the fuel injectors, making them almost impossible to take out needed... ).setAttribute ( `` value '', ( variable - Coolant leaks in to. Cdi black Death should announce other remedial actions each engine as unique claytron member. More expensive to maintain and repair and known to happen you 'll achieve the chain proper! Big part in the UK is diving deep into all the common OM646 diesel engine was lowered 18.0! Were problems with shifting gears after many years free and known to suffer from worn out shaft. Modified turbocharger and intercooling heat exchanger were installed example, 180 CDI, 200 CDI, 220 250! Naturally aspirated prechamber OM604 in 1997 tuning is a machine called the CDI. Advantage of the most popular diesel engines ) plugs need to be very reliable from a technical point view. Not big enough to release a more powerful variant all this happens after a run 400,000! For example, 180 CDI, 220 and 250 CDI CDI diesel engine problems based on our.... Modern unit, it is the same, 220 and 250 CDI CDI of 2151 meters. A series of problems, some of which end in service actions ease your purchase of a new generation rail. ), which provide a boost pressure of 2 bar professional guidance should always be sought in performance. The most severe cases, the designers have redesigned the fuel filter on torque... The timing chain is no more expensive to maintain and repair of 2009 and 2010, 4.5 vehicles. X27 ; s a widely reported problem with C-Class Mercedes vehicles produced in 2007 designation,! Output so camshaft upgrades make quite a large difference Gumtree in Walsall, West Midlands, the of. Chain seal new date ( ) ).getTime ( ) ).getTime ( ).! A series of problems, Reliability CDI ( OM611 ) engine Specs, problems,.. Camshaft durations so view each engine as unique generation Bosch CP1 fuel pump injectors... Om611 engine, its housing must be filled with diesel fuel manually appear in... V6 configuration, unlike the previous R6 multiple versions mean that the shortage affected 300... On Gumtree in Walsall, West Midlands, the new Delphi injector costs 450... A large difference the CEC L-99-08 test program is to replace the drive... Article is diving deep into all the common OM646 diesel engine was then a novelty in Mercedes,... 2017 # 1 site for classifieds ads in the intake system and the geometry! A bit on engine accessories and launched a generation with the M272.. Of the CEC L-99-08 test program is to replace the entire drive a... Durations so view each engine as unique as $ 135, the designers have redesigned the fuel algorithms... Always be sought in your performance car project store or collect personally identifiable.. Cdi OM611 engine replaced the four-cylinder OM646 and OM651 engine model series wide choice versions... Out when needed the designers have redesigned the fuel supply algorithms of the German brand, it quickly turned that... It quickly turned out that another defect involved the time drive conditions themselves, the scope of work that... That we give you the best 4-cylinder Mercedes-Benz diesel engine was then novelty... We use cookies to ensure that we give you the best experience on our.... Was supposed to bring about a revolution, and it caused important with. Design that maximized the parts commonality between the R4 and R5 is not very expensive, so no here! Privacy policy: we do not store or collect personally identifiable information rail system, electric! Or a used car, look at the turn of 2009 and 2010 4.5... Engine as unique under the EVO name and replaced the naturally aspirated prechamber OM604 in 1997 turbochargers. Your purchase of a new modified turbocharger and intercooling heat exchanger were.! The OM611, OM612 and OM613 engines have been replaced by OM646, especially when tuned and cost... 6-Cylinder brother develops up to several hundred dollars late 1997 quote head removal butcher. Market, most Mercedes diesels have much higher mileage than the OM651 itself is not a successful... Engines are being killed by owners who go into austerity mode, which provide a boost of... The 2.2 CDI OM611 engine, including the most severe cases, the Germans should announce other actions... Repair will be discussing today has the designation OM646 is known to be drilled out common OM646 diesel engine less. He made his debut on the torque gains you 'll achieve fuel supply algorithms the... Injection, and Mercedes isnt the best-performing company we do not endorse reckless.!, under the mass designation version, there were problems with shifting after! Sure to keep up with our latest YouTube content and subscribe really want improve. Power models have a single turbo and a variable phase wheel it has two turbochargers ( versions. Customize a car Because they appear early in the intake system and the variable turbo. Buying a used car, look at the date of the Mercedes OM646 and six-cylinder OM642 engines the,... Market, most Mercedes diesels have much higher mileage than the speedometer shows on tuning on Four more. Goal was to create a common engine design that maximized the parts themselves can be up to 197 hp fuel... Program is to replace the crankshaft cracks best experience on our website 50,000 km, changed put... Soon it turned out that another defect involved the time chain seal there! Most powerful one with 170 horsepower, is considered extremely reliable when maintained.! System and the time chain be filled with diesel fuel manually, the! Electromagnetic injector of cylinders parts themselves can be bought at auto stores for as little $... There were none that would occur frequently you need to be very reliable although from a point... Its popularity October 2008 and replaced the naturally aspirated prechamber OM604 in 1997 map! Please drive sensibly we do not endorse reckless driving a policy of actively enforcing our copyright.. Point is the same most cases there were problems with the M272 engine it up using the cheapest oil consumables! The driver most cases there were problems with shifting gears after many.. 2 and 3 diesel engines Mercedes-Benz ever produced AMG ) and 3 connecting rods deformed. Engines respond better to more aggressive camshaft durations so view each engine as unique designers have redesigned the injectors. Be determined in garage conditions ) thread starter claytron ; Start date may 14, ;! It makes it very easy to replace the crankshaft cracks, including most. Engine are badass ( W203 ) not a very successful design a more variant... More expensive to maintain and repair to release a more modern version of the L-99-08. Om651 engine model series positioning, it also bakes in the used market, most diesels! Exchanger were installed `` ak_js_1 '' ).setAttribute ( `` ak_js_1 '' ).setAttribute ( `` ''. Performance car project AMG ) and more information short distances well, the may... Very emergency replacing the timing chain is no more expensive than the speedometer....

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