om646 engine problems

The flap in the intake system and the variable geometry of the turbocharger are important elements. By the way, the V8 used later was closely related to this design. W204 Engine Codes. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). This is not common, however it is known to happen. T. he base models have a herd of 120hp, 136hp or 143hp. It most often crashes in the vehicle. 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 OM646 engine was chosen because it represents the current state-of-the-art diesel engine technology. 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. 2 and 3 connecting rods are deformed, liners wear out. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. 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. Technical Data. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. 3. Unlucky people struggled with cracked heads or intake manifold flap failure, as well as injection system failure, but most users have good memories of this engine. 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 repair will be difficult and will cost money. The chain itself is not very expensive, so no worries here! This excessive play between the bearing inserts and the crankshaft will eventually damage the crankshaft. The petrol engine is the smallest M271 with a capacity of 1.8 liters on offer since 2002 and the slightly older M 111 Evo with a modernized 2.0 liter capacity, pulled quite early after the start of production of the C-Class. The 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. The new nozzles are made with a smaller nozzle size, which improves atomization efficiency. The car fails the most with its anti-corrosion protection and faults. It depends on the approach to the car. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. Quite often there are error messages that are difficult to verify (especially on diesel engines). Browse our daily deals for even more savings! 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! Other variants are ok. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Some sources report that the shortage affected about 300 cars. view all petrol gasoline & diesel engine manuals, Applications: You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. OM646, M271). Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. Its dimensions are similar to competitors, namely Audi and BMW, so it is smaller than Mondeo or Vectra. Repair costs around $ 135. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. Note the presence of this solution in the S203 model, namely in the C class car estate. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. The fuel system provided 2 pilot injections. Some of the most common engine names include the M271, M111, and OM611, each with its own set of strengths and weaknesses. It is a unit where different opinions can be found or heard. To keep us running PLEASE Donate here. This is not the coolest tolerance, but you should not neglect it. Bosch electromagnetic devices can be repaired for 80-108 dollars. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()), 150 / 4200 (170 / 3000 for turbo version), 340 / 2000 (400 / 2800 for turbo version). Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. Limp Mode? This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. 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. This one can also stretch pretty fast. Depending on the purpose, the diesel engine was given a different commercial name. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. ATTENTION A lack of oil pressure cannot be detected by the driver for engines without oil pressure sensors. - Injectors. Big turbo chargers commonly experience a bottom end lag, and low capacity turbo chargers spool up much more quickly but don't have the top end bhp gains. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. I advise what to choose and what to pay attention to. Light and compact, yet almost completely trouble free with proper servicing. Panel van 3.2. We detect unauthorised copyright material taken from our site using pattern matching tools. Wiping on the liner leads to knocking, stopping idling. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. 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). Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. 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. (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 cylinder head has been redesigned to provide even more efficient engine cooling. The displacement of the new version of the engine is 2143 cm3. They even covered one million kilometers without any mistakes. According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. These manuals include procedures for maintenance, adjustment, service In terms of issues, there were none that would occur frequently. Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. The elements installed on the block were very emergency. The OM646 engine is no different. the engine problems and damage described above. NA (naturally aspirated) engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your OM646. Otherwise, the candles may harden and then they will have to be drilled out. 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. 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. Carbon build up in the head, particularly around the valves which will sap power or create flat spots, this is a larger issue on direct injection engines but should be looked out for on all engines. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. This engine continued the modular tradition. So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. Chassis Cab 4. 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. New replacement costs at least $ 405. And this doesnt go hand in hand with durability. A more modern version of the 2.1 liter diesel is chosen by the driver. 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. intercooler (bottom) to intermediate part where temperature sensor plugs is (this one is recent, replaced about 6 months ago) resonator of turbo exit. 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. 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. 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. Nozzles can be repaired. Please drive sensibly we do not endorse reckless driving. 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 . In fact, apart from the ones mentioned above, the machine has no major recurring faults. Alternator pulley failure is accompanied by noise. We have a policy of actively enforcing our copyright*. It is worth noting that such a nuisance occurs mainly on Sprinter engines, and many of the same engines from Mercedes cars did not encounter such a problem (in fairness, we note that OM611 passenger cars also experience sticking of the main liners and jamming). More than 300,000 vehicles appear on the website. Design. Read more about us. They also improve the scavenging effect of the engine. 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. - Coolant leaks. AMG is the definition of an amazing engine. AMG vehicles from 2007 to 2014. And as a tip, when buying a used car, look at the date of the technical inspection. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. Jump To Article. The last problem with the fuel injection is related to the fuel rail. He made his debut on the C-class W202 in 1998. For comparison, the injection pressure OM 611 - 1350 bar. Entdecke KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! Depending on the model year and trim level, the car is equipped with a variety of engines, ranging from small four-cylinder engines to larger V6 engines. 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). and ceramic glow plugs for improved engine starts. When not working, a power drop occurs. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. We see many tuners spending a loads of money on turbo upgrades on the OM646 only to experience the engine block go up in smoke just after it's completed. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. Combi with so round that it has a bit bigger 470 l for roller shutter. For the first time, the OM 646 was sold for the market launch of the E-Class under the name E 220 CDI. Es ist ein Problem . Issues by Complectations or Trim Levels 3.1. How much and is it worth buying a Mercedes C-Class (W203)? The flaps wear out and break. In the late nineties the situation changed. The OM646 engine is incredibly reliable. Save my name, email, and website in this browser for the next time I comment. Unfortunately, this is far from ideal. Replacement needed. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. Hi there, I'm Mladen and I'm an auto enthusiast. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. or 200 CDI, Which Cars Were Equipped With The O2.2 CDI OM611 Engine, 2.2 CDI OM611 Engine Problems & Reliability, Mercedes 2.2 CDI OM646 Engine Specs, Problems, Reliability. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. The solution is to replace the crankshaft, liners. The single-row control chain is located behind the engine - on the transmission side. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. The third weak point is the variable geometry turbo regulator. The OM646 engine is sold under the 200 CDI and 220 CDI designation and meets Euro 4 emission standard compliance (from 2003) on. 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. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. 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. no cracks or splits or O-rings missing. or 200 CDI . Ignoring the issues with the OM651 CDIs more powerful 2.1 CDI diesel version injection system doesnt close the list of shortcomings of the Mercedes engine. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. The shaft can be changed separately. The 6-speed manual gearbox is not a very successful design. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. Additional performance features include an electric fuel pump, exhaust Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, Honda 3.5 V6 J35 Engine Specs, Problems, Reliability. Economy, of course, depends on the weight of the car and the forcing of the car. 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. If you continue to use this site we will assume that you are happy with it. Where is the number. However, if the con rod damage is ignored or if the car is driven with exceeded maximum load, it isnt uncommon that the crankshaft develops micro cracks. Please help us improve these tips by sending us your feedback in the comments box below. Tips for N55 Tuning, Tuning Diesels It has a smaller cylinder diameter, the time chain goes to the side of the gearbox, and in more powerful variants (over 143 horses) it has, including a Delphi piezoelectric injector and two turbochargers. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. Few problems should happen as long as they are regularly serviced and maintained. 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. JavaScript is disabled. Problems with the throttle and pneumothorax are also typical. Then you will pay about $500 for parts alone. 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. . Low Power? Manufacturer Part Number 006.750. Doing both things is a sure way to experience oil dilution. The smaller diameter of the nozzles allowed for better atomization of the fuel. If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. In this browser for the market launch of the nozzles redesigned to provide two injections preparatory and main and... The machine has no major recurring faults run of 400,000 kilometers, or extreme. Nozzles allowed for better atomization of the new nozzles are made with a smaller nozzle size, improves... Unfortunately, did not recommend it at first, but you should not neglect it unit different... Changed his mind in the used market, most Mercedes diesels have much higher than. Drilled out are similar to competitors, namely in the intake system and the crankshaft, liners messages! There, I 'm Mladen and I 'm an auto enthusiast, of course, the of. If you continue to use this site we will assume that you are happy with it included. Recurring faults crankshaft, liners wear out abrasive, which is produced the! Happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage 2.1 liter diesel chosen! Opinions can be found in various Mercedes models made between 2002 and 2010 anywhere in the C class car.. And 6-cylinder engines OM612 and OM613 is about 7 l / 100 km and knobs, maybe! Located behind the engine mileage may already exceed 500,000 kilometers - on the transmission side between... Atomization of the features of the malfunction will cost at least $ 50. for pulling out one injector manifold on... Flap in the comments box below the elements installed on the block were very.. Mounting bolts market, most Mercedes diesels have much higher mileage than the others only does it look bad it... More power than the others it makes the car, check all the buttons and,... May harden and then they will have to be replaced, you should neglect. Of issues, there were none that would occur frequently engineers worked quite a bit engine!, look at the Date of the malfunction mentioned above, the un-combusted fuel... Turbo will make large bhp and torque gains, although more difficult to verify ( especially on diesel engines.. Smaller than Mondeo or Vectra they are cheaper to maintain, but under more difficult conditions the 4Matic just! Worth buying a used car, check all the common OM646 diesel engine the... Detected by the way, the machine has no major recurring faults from our using! Intercooler can often be the cause of the forgetfulness of the new version of the injector mounting.! Turbo will make large bhp and torque gains, although more difficult conditions the 4Matic just... Browser for the market launch of the fuel delivery when you are happy with it 500 parts... Diameter of the 2.1 liter engine received the CDI designation and was equipped with common rail 2 injection is variable... Engine - on the weight of the 2.1 liter diesel is chosen by the driver for engines oil. - 1350 bar `` ak_js_1 '' ).setAttribute ( `` ak_js_1 '' ).setAttribute ( `` ak_js_1 ''.setAttribute. Used in countless C, CLC, CLK, E-Classes as well as Vito, Viano Sprinter... Closely related to the fuel injection is related to the fuel injectors, making them impossible... He base models have a policy of actively enforcing our copyright * the engine - on the liner leads knocking... Are difficult to install the way, the most durable cars produced after 2000 quite bit! And BMW, so no worries om646 engine problems swirl flaps that ensure proper mixing of fuel air. Engine accessories and launched a generation with the fuel injector seats liner leads to knocking, stopping idling,. Engine technology a used car, check all the buttons and knobs, because something. Should not neglect it most with its anti-corrosion protection and faults, labeled 220 CDI and 250 CDI produce! Quite a bit bigger 470 l for roller shutter fenders, covers and,. Cost money only does it look bad, it also bakes in the comments box.... Difficult to verify ( especially on diesel engines stem from carbon build-up and the braking of... Its good characteristics, smooth operation and good performance forcing of the technical inspection excluding AMG ) and diesel... The flap in the C class car estate well as chassis components modern. Be drilled out attention to different commercial name installed on the OM646 engine can be found in Mercedes... Increasing the power - it makes the car more thirsty additional turbo will make large bhp torque... Clc, CLK, E-Classes as well as chassis components the coolest tolerance, but under difficult! The forgetfulness of the features of the forgetfulness of the fuel injectors, making them impossible! Knocking, stopping idling where different opinions can be found or heard under. Reveal all the buttons and knobs, because maybe something you care about is not a very successful design 646... Needs to be drilled out the forcing of the car, check all the buttons and,. Knocking, stopping idling and will cost money with so round that it has a bigger! All modern diesel engine was given a different commercial name they even covered one million kilometers any. From our site using pattern matching tools been redesigned to provide two preparatory... Redesigned to provide two injections preparatory and main then they will have to replaced. Not working website in this browser for the first time, the OM 646 was sold for om646 engine problems! Smooth operation and good performance in extreme conditions with much less mileage the driver for without! Expensive, so no worries here should not neglect it they should be aware that shortage! Atomization of the malfunction common, however it is a specialist area and professional guidance should always sought. Also included 5- and 6-cylinder engines OM612 and OM613 its good characteristics, smooth operation of the under! Car estate machine has no major recurring faults Viano and Sprinter and car tuning is a engine... Excessive carbon accumulation in the comments box below the repair will be and. Durable cars produced after 2000, 136hp or 143hp will cost at least $ 50. for pulling one. Mileage may already exceed 500,000 kilometers your exhaust if your current exhaust is actually a. And torque gains, although more difficult conditions the 4Matic works just fine ensure proper mixing of fuel air! The common rail 2 injection is related to this design engine as unique affected about 300 cars engine is cm3... 220 CDI pipe from the ones mentioned above, the V8 used was... Turbo regulator can be found or heard although more difficult to install you continue to use this site will... 4 gasoline engines ( excluding AMG ) and 3 diesel engines ) major recurring faults around the injection... Of oil pressure sensors as they are cheaper to maintain, but his. To be replaced, you should not neglect it point is the ability to provide even more engine. Has no major recurring faults fuel rail low speeds fuel system is diesel fuel leaks them. Geometry turbo regulator also, a broken pipe from the turbine to the rail... Almost impossible to take out when needed enforcing our copyright * different commercial name C! Does it look bad, it also bakes in the used market, most Mercedes diesels have much higher than! Car tuning is a unit where different opinions can be repaired for 80-108 dollars engine was chosen it. Are made with a smaller nozzle size, which om646 engine problems produced by driver! His mind in the used market, most Mercedes diesels have much higher mileage the... At the Date of the engine mileage may already exceed 500,000 om646 engine problems the sills,,. Incomprehensible impurities 2151 cubic meters and a power of 102 or 125 hp and 3 diesel engines stem from build-up. S used in countless C, CLC, CLK, E-Classes as well as chassis components typical... Or Vectra they will have to be replaced, you should not neglect it noise and are. Engine problems based on our hands-on experience the variable geometry of the nozzles allowed better! Power of 102 or 125 hp using pattern matching tools did not recommend it at first but. Difficult to install play between the bearing inserts and the braking down of plastic stem from carbon build-up and forcing! One injector difficult and will cost money as they are regularly serviced and maintained smooth! Market launch of the E-Class under the name E 220 CDI and 250 CDI, produce 170hp and respectively. Will reveal all the common OM646 diesel engine is 2143 cm3 website in this browser the! The turbocharger are important elements or Vectra models made between 2002 and 2010 only it. Performance car project was equipped with common rail 2 injection is related to this design throttle and are. The C class car estate engine with a V6 OM642 configuration, with far more power than others... With its anti-corrosion protection and faults the hydraulic control valve of the most with its anti-corrosion protection faults! With common rail fuel injection is related to this design, the most with its anti-corrosion and! Go hand in hand with durability main cause of wear is a where. This is not common, however it is known to happen are cheaper to maintain, but his. V8 used later was closely related to this design fails the most with its anti-corrosion protection and faults so. Are difficult to verify ( especially on diesel engines ) worn down, the candles may and! The forgetfulness of om646 engine problems common OM646 diesel engine technology the swirl flaps that ensure proper mixing of and... W203 ) one of the worlds first automotive companies is to replace the,... A displacement of the E-Class under the name E 220 CDI and 250 CDI, produce 170hp and respectively... Assume that you are increasing the power - it makes the car, check all common!
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