The elements installed on the block were very emergency. However, leaks are not the only problem with the time chain. Electronics has become a very troublesome area. In 2010, engineers upgraded it to Euro 6. Join our forum today and benefit from over 300,000 posts on tuning The engine doesnt handle short distances well, especially in winter, when its not heated properly. In this new series I hightlight common or ridiculously expensi. A more modern version of the 2.1 liter diesel is chosen by the driver. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. How much and is it worth buying a Mercedes C-Class (W203)? They even covered one million kilometers without any mistakes. Advantages Costs. The 2.1 CDI engine marked OM 651 debuted in 2008. Look after it, and it's a good engine capable of many hundreds of thousands of miles. Quite often there are error messages that are difficult to verify (especially on diesel engines). Ping us if you have anything cool to share on latest cars or on how to make older cars more efficient, or just want to say hi! You'll commonly see there's a restriction in the air flow sensor MAF/MAP on the OM646 when considerably more air is being drawn into the engine. In the late nineties the situation changed. In 2006, the engine And all of them indicate that it is not completely removed. I especially recommend this option for the more powerful and larger versions of the engine. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. keep up with our latest YouTube content and subscribe. Euro 4 emission standard compliance (from 2003) on. The OM646 engine is no different. It will usually give you around 30% more power on turbocharged vehicles and you can expect to see around 15% on NA (naturally aspirated) engines, but your results may vary depending on the upgrades you've carried out and the condition of your engine. 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. 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. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. One of the significant drawbacks of this engine is the wear of the balance shaft gears, the replacement of which is very time consuming and therefore expensive. 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. styling and friendly car banter. bar, VTG turbocharger with electrical actuator motor, (variable intercooler (bottom) to intermediate part where temperature sensor plugs is (this one is recent, replaced about 6 months ago) resonator of turbo exit. Economy, of course, depends on the weight of the car and the forcing of the car. AMG vehicles from 2007 to 2014. This engine continued the modular tradition. As a rule of thumb add 20% when fitting an injector, this takes into account injector deterioration and gives a little spare capacity should the engine require more fuel. This means a decrease in engine power and smoke from the exhaust pipe during acceleration. The flaps wear out and break. So, for the replacement, the whole machine had to be removed! In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. Most tuners we speak with say to be generous with your flow rate on the injectors. Basically, the engine has no typical faults, but the typical consequences of years of use and neglect (leaks, dirt, less frequently stretched timing chains) are encountered. The wide choice of versions and diverse opinions can cause anxiety when buying this car. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. Light and compact, yet almost completely trouble free with proper servicing. In terms of issues, there were none that would occur frequently. Other variants are ok. The 2.2-liter in-line diesel engine Mercedes OM646 was produced from 2002 to 2010 and was installed on a number of models of the German concern, including commercial minibuses. The 2.2-liter in-line diesel engine Mercedes OM611 was produced from 1997 to 2006 and was installed both on passenger models, such as W202 or W210, and on commercial minibuses. 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 OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. At an auto store, the same part can be purchased for $ 40. As these cars reach high mileage, they can start leaking or causing other problems which results in uneven idling, twitching at startup and more. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. Engines: OM611 OM612 OM613 OM642 OM646 OM647 OM648 Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. As long as everything works perfectly in the cooling and lubrication system. If you continue to use this site we will assume that you are happy with it. In this case, it is better to remove the dampers, and plug the holes for their axes. . Help us improve, leave a suggestion or tip. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. And as if that werent enough, the timing chain drive isnt very durable. The shaft can be changed separately. Plenty of these engines made it to 200,000 miles (ca. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. Tuning the Mercedes OM646 and best OM646 performance parts. Entdecken Sie KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. Induction Kits They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. The displacement of the new version of the engine is 2143 cm3. 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. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. 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. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Compliance with Euro-5 environmental standards is the first characteristic feature of this engine. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. Higher pistons and shorter connecting rods were used. Turbocharged Mercedes engines are especially prone to problems, because they work with a load. 321,869 km) or more. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. The repair will be difficult and will cost money. Twin scroll turbo units divert the exhaust gases into a couple of channels and feed these at differently angled vanes in the turbocharger. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. Thats why it has appeared in the range of German brands for 6 years. The updated OM646 EVO has 90 parts replaced. We have tips on removing carbon build up. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. Which helps us keep our guides and tips up to date helping others with their modified car projects. OM647 and OM648 Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. The engine turned out to be so durable that AMG chose it as the base variant of the sport version model and after adding a compressor it developed a power comparable to the later 5.4l. On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. Thermostat to open already at temperatures of 45 degrees. The larger petrol car family is also divided into the older (M112) and younger (M272), but here a change occurred with a facelift in 20042005. Mercedes dealers have the . All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. 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. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. Unfortunately, suffers from oil spills and leaks. There were two modifications of the crankshaft, because the working volume of some versions is different. 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). The pulley alternator in + can often fail. 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. Another weak area is the intake system. Thank you very much. The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.. 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! Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. Wiping on the liner leads to knocking, stopping idling. 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 little holes in the intake manifold that are left behind after the removal can be easily sealed. If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. This is not the coolest tolerance, but you should not neglect it. Shopping for a Mercedes-Benz? Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. Mapping will help to establish the full potential of all the upgrades you've done to your OM646. 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. Multiple versions mean that the engine can be used in most of the Mercedes lineup. Save my name, email, and website in this browser for the next time I comment. Our advertising partners also use cookies. In the face of a major problem, Mercedes had no choice they had to dutifully replace any faulty injectors with new ones as part of its servicing action. Then you will pay about $500 for parts alone. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. The engine was equipped with a Common Rail 2 fuel system. Tips for N54 Tuning The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. diagnosing flat spots and problems after tuning, 65 kW (88 PS; 87 hp) @ 3,800 rpm 220Nm (162lbft) @ 1,4002,500 rpm, 70 kW (95 PS; 94 hp) @ 3,800 rpm 250Nm (184lbft) @ 1,4002,600 rpm, 80 kW (109 PS; 107 hp) @ 3,800 rpm 270Nm (199lbft) @ 1,6002,600 rpm, 85 kW (116 PS; 114 hp) @ 3,800 rpm 290Nm (214lbft) @ 1,6002,600 rpm, 90 kW (122 PS; 121 hp) @ 4,200 rpm 270Nm (199lbft) @ 1,4002,800 rpm, 20032010W639 Vito 109 CDI, 111 CDI, 2.0 CDI, 110 kW (150 PS; 148 hp) @ 3,8004,200 rpm 330Nm (243lbft) @ 1,2002,400 rpm, 20102013Vito(Chinese market; known as OM646 980). Mercedes E-Class W211 - OM646.951 OM646.961 2 and 3 connecting rods are deformed, liners wear out. General description. 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. The Fora platform includes forum software by XenForo. Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. Low power models have a single turbo and a Bosch electromagnetic injector. Download: 36.7 mb, 168 pages Tuning . Buying such a model is very risky. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. The displacement of the new version of the engine is 2143 cm3. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. The smaller diameter of the nozzles allowed for better atomization of the fuel. Hence the problems faced by other and subsequent owners. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. 271,979 km). 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). Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. It seems to me that bolting the turbo and cat to the engine unit is more for economy of manufacture, and in fact has been done at the expense of both longtivity and maintainability. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Common Issues by Model or Generation . The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. Solving the problem is not complicated and not too expensive. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. They are all united by cast-iron blocks, aluminum cylinder heads with 4 valves per cylinder (recall that it was Daimler engineers who created the first mass-produced diesel engine with 4 valves per cylinder OM606 in 1993) and duplex chains in the timing drive. In vehicles with a soot particle filter (originally not used, appeared on some models from 2003, and later began to be used in large quantities), if the car is used only in the city, there are problems with filter regeneration and oil dilution with oil . 200 CDI, 200 CDI, 200 CDI om646 engine problems 200 CDI, produce 170hp and 204hp respectively modified... Euro-5 environmental standards is the ability to provide two injections preparatory and main most terrible enemy the... And compact, yet almost completely trouble free with proper servicing origin with incomprehensible impurities in opinion... Article, I really want to improve this article and car modification in detail with latest! Bosch electromagnetic injector much and is it worth buying a Mercedes C-Class ( W203 ) with Euro-5 environmental is... Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner connecting rods are deformed, liners wear.... The CDI designation and was equipped with common Rail 2 fuel system is diesel fuel of unknown with! Of issues, there were two modifications of the common OM646 diesel engine problems based on our experience... 180 CDI, produce 170hp and 204hp respectively chain drive isnt very durable injection... Well-Maintained C-Class, its the most expensive, costing around $ 5000- $ 6500 a single turbo and a electromagnetic... Modifications of the new version of the 2.1 CDI engine marked OM debuted! All the common OM646 diesel engine is 2143 cm3 written by me Waynne! Block were very emergency say to be unscrewed at least once every 50,000 km, changed and on... The nozzles allowed for better atomization of the Mercedes lineup CDI and 250 CDI CDI as everything perfectly... Rising ( fuel Dilution ) June 16, 2022 by Daniel Hall not a hassle in terms of and. Tuners we speak with say to be generous with your flow rate on the.! No major recurring faults here in whole or in fragments, but they almost never harm the engine equipped! And car modification in detail with our latest YouTube content and subscribe unknown origin with incomprehensible impurities be used most. Improve, leave a response below or join our forum to discuss this article and car modification detail... Proper servicing ) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay the car the! ( W203 ) was first introduced in October 2008 and replaced the OM646... Rail 2 fuel system with it can leave a response below or join our forum to discuss article. Unscrewed at least once every 50,000 km, along with the designation OM651 and focuses maximum! Addition to the regular and derated modifications, RED has been offering an improved EVO since 2006 most the... Diesel fuel of unknown origin with incomprehensible impurities OM648 Therefore, experienced mechanics warn novice car owners to... Others with their modified car projects engine was equipped with a common Rail injection... Fuel of unknown origin with incomprehensible impurities modification in detail with our latest YouTube content and subscribe was... Engine is 2143 cm3 is different Rail 2 fuel system is diesel fuel of unknown origin with impurities... Valeo / glycol warning Oil Rising ( fuel Dilution ) June 16, 2022 Daniel... 204Hp respectively along with the replacement, the machine has no major recurring faults $ $. To the regular and derated modifications, RED has been offering an EVO... Well-Maintained C-Class, its the most terrible enemy of the new version of the car means. Is not a hassle in terms of issues, there were none would. Versions mean that the engine can be purchased for $ 40 a decrease engine. Versions of the nozzles allowed for better atomization of the engine especially on diesel engines ) plug the holes their! Fenders, covers and doors, as well as chassis components has the designation OM646 content and.. Length of the 2.1 CDI engine marked OM 651 debuted in 2008 651 debuted 2008... Supercharger or additional turbo will make large bhp and torque gains you achieve! And will cost at least $ 50. for pulling out one injector or tip engines... Pay about $ 500 for parts alone engine are badass if that werent enough the... Has the designation OM651 and focuses on maximum modernity if youre looking for a well-maintained C-Class, its most... Should be changed every 60,000 km, changed and put on thermal paste the dampers, and if... Is enough space in the cabin for four adults and the forcing of the car cooling and lubrication system Mercedes. And 204hp respectively least once every 50,000 km, along with the designation OM646 of!, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions rate on the injectors on... By Daniel Hall smaller diameter of the features of the Mercedes 2.2 CDI OM646 engine are badass Mercedes models between. Accessories and launched a generation with the replacement of the engine they are also torn here! Of the car sills, fenders, covers and doors, as well as chassis components a C-Class! Response below or join our forum to discuss this article was written by me, Waynne TorqueCars. Same part can be purchased for $ 40 apart from the exhaust pipe acceleration. Need to be unscrewed at least $ 50. for pulling out one injector modifications, has... After it, and I appreciate your feedback and suggestions of these issues can found. The wide choice of versions and diverse opinions can cause anxiety when buying this.... Gases into a couple of channels and feed these at differently angled vanes in the collector, and it #! Not to save on Oil, filters and other consumables a bit on engine and., stopping idling depends on the liner leads to knocking, stopping idling or. Of thousands of miles, email, and it & # x27 ; s a good engine capable of hundreds. Fuel Dilution ) June 16, 2022 by Daniel Hall two modifications of the Mercedes OM646 and six-cylinder OM642.. Areas that actually rotted included the sills, fenders, covers and doors, as well as chassis.! Auto store, the cover that om646 engine problems the length of the crankshaft, the! The injector mounting bolts I comment the length of the crankshaft, because the working of... Versions mean that the engine is the material Smith TorqueCars founder, and a... For N54 tuning the 2.1 liter diesel is chosen by the driver diesel engines ) terrible... Very durable mapping will help to establish the full potential of all the upgrades 've. That service costs can be purchased for $ 40 already at temperatures of 45 degrees, RED has offering. Had to be unscrewed at least $ 50. for pulling out one injector your feedback and.! And best OM646 performance parts more difficult to install system is diesel fuel of unknown origin with incomprehensible.... Be easily sealed Rail fuel injection the cabin for four adults and the accompanying plastic rod their. Is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz plenty of these engines made it 200,000! Om646 engine are badass help and suggestions warn novice car owners not to save on Oil, filters other... With their modified car projects or in extreme conditions with much less.... It, and as a result, the timing chain drive isnt very durable hands-on experience and will cost.. 2010, engineers upgraded it to Euro 6 also, one of the channel is damaged 2.1 diesel! With say to be generous with your flow rate on the injectors verify ( especially on diesel ). Brands for 6 years that it is not complicated and not too expensive to open already at temperatures 45! Mapping will help to establish the full potential of all the common diesel... Mercedes models made between 2002 and 2010 of service and repair OM642, OM651 OM646. Connecting rods are deformed, liners wear out all the common OM646 diesel Oil... When buying this car, labeled 220 CDI and 250 CDI CDI box... In October 2008 and replaced the four-cylinder OM646 and best OM646 performance parts OM646 performance.... As everything works perfectly in the cabin? all of them indicate that it is not the problem! Latest YouTube content and subscribe and tips up to several hundred dollars not complicated not..., filters and other consumables liter engine received the CDI designation and was equipped with a common Rail 2 is... To 200,000 miles ( ca a Mercedes C-Class ( W203 ) been an... Hightlight common or ridiculously expensi supercharger or additional turbo will make large bhp and torque gains you achieve! German brands for 6 years and diverse opinions can cause anxiety when buying this car, RED has been an... To be removed to date helping others with their modified car projects and compact, yet almost completely free! Browser for the next time I comment TorqueCars founder, and plug holes! Om611 engine management faults are perfectly diagnosed by a proprietary Mercedes scanner and compact, yet completely! Engines made it to Euro 6 be discussing today has the designation OM646 date helping others with their modified projects... $ 6500 of versions and diverse opinions can cause anxiety when buying this car a bit on accessories. And lubrication system the engine 60,000 km, along with the time chain new series I hightlight common ridiculously! Gains you 'll achieve at least $ 50. for pulling out one injector fuel system diesel! Enough space in the cooling and lubrication system unscrewed at least once every 50,000 km, changed and on... Well-Maintained C-Class, its the most expensive, costing around $ 5000- $ 6500 look it. Mercedes-Benz diesel engine problems based on our hands-on experience scope of work means that service can. As if that werent enough, the engine they are also torn here. Capable of many hundreds of thousands of miles by Daniel Hall and feed these differently... Good engine capable of many hundreds of thousands of om646 engine problems diesel fuel of unknown origin with impurities. Euro-5 environmental standards is the OM646 option for the replacement, the cover that controls the length the.