Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. The main symptom of problems with injectors is an uncertain start of the engine. Plastic painting tips for car interior and exterior.Read more Tuning the 150bhp Diesel Astra Sport HatchRead more MPG calculator UK miles per Gallon calculate MPGRead more / UK Modifying & Tuning / Car Mods Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. hoses that run from: intermediate part where the temp sensor is (top) - intake. The best AMG engine is a 6.2-Liter V8, fitted in the 63. Sorry, in order to post a comment, you must be logged in. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . Depending on the purpose, the diesel engine was given a different commercial name. Greeting. 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. You'll never find a OM646 Motorsport and race camshaft is a pleasure to live with when driving in heavy traffic. Despite the fact that the engine from the Mercedes 2.2 CDI OM646 Engine is made by the Germans to the conscience, it requires care. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. All engines are equipped with intercoolers. The first generation Bosch CP1 fuel pump is also very reliable. If you happen to drive the car to the mileage where you need to replace the timing chain, have no worries. A more modern version of the 2.1 liter diesel is chosen by the driver. Its successor, designated the M272, turned out not to be much worse, as it was based on the very successful predecessor. Use of this site: Please treat the information on this site as purely speculative and note that we accept no responsibility for damage or loss incurred due to following a recommendation made on this site, our videos or in the forum. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. 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. Get the best deal for Engine Rocker & Valve Covers for Edsel Citation from the largest online selection at eBay.com.my. The OM646 engine is incredibly reliable. The first Mercedes common rail diesel was introduced in late 1997. Save my name, email, and website in this browser for the next time I comment. In practice, two seats with a small luggage capacity of 310 liters. One of the most notable features of the Mercedes C200 is its engine. The engine starts to sneeze, stalls. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]. Low pressure could be caused by a clogged fuel filter, clogged tank strainer, a pinched pressure line, or a worn out electric fuel pump. or 200 CDI . 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 damage can also be brought upon crankshaft with oil dilution issues. 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. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. Low Power? Solenoid valves are used to control the turbocharger and EGR valve (old engine 2.1). You will also have full access to If you continue to use this site we will assume that you are happy with it. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. 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). Removing them does not have a considerable impact on the engines behaviour. 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! For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. Lets start with fuel injectors. 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. When not working, a power drop occurs. If you continue to use this site we will assume that you are happy with it. A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A number of solutions included in the TwinPulse name are used. Unfortunately, suffers from oil spills and leaks. Loves high-quality and clean fuel. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. Here are some of the engine codes for the W204: 1.6-liter M274 I4 engine - M274.910, M274.920. turbocharged inline-four cylinder motor produced between 2002 and 2010. The purpose of the CEC L-99-08 test program is to evaluate oil performance with regard to wear, cleanliness, and sludge. Since a special stand is required. The test is a replacement for the OM602A test but with more severe requirements. 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. General description. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. Also, the cylinder head camshaft drive often wears out. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. Low Fuel Economy? Their strength, however, is simplicity and lack of effort. no cracks or splits or O-rings missing. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. 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. Thats why I compiled the list above in this way. 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. If youre looking for something more powerful, its better to go for the M112 variant, say 170 HP, rather than the comparable 4 cylinder compressor. 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. Some of the most common engine names include the M271, M111, and OM611, each with its own set of strengths and weaknesses. 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 new turbodiesel is very advanced, and therefore more expensive to maintain and repair. All content is subject to copyright protection - LifeOnFour 2023. For a better experience, please enable JavaScript in your browser before proceeding. 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. They even covered one million kilometers without any mistakes. filed under Mercedes. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. The common rail injection system ensures smooth engine operation and low fuel consumption. TorqueCars will provide a guide to OM646 tuning and outline the best modifications. 3. Problems that have occurred in the latest OM 651 engines are related to Delphi fuel injectors (defective, already replaced) and coolant leaks. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. The system is aired. Quick couplings most often dry out in the first years of operation of the engine with overheating. Advantages Costs. I advise what to choose and what to pay attention to. Independent repair shops may quote head removal or butcher it up. Mazda SKYACTIV 2.0L and 2.5L engines. Entdecke 2x Luftfilter passend fr Mercedes C220 S204 W204 2.1D 07 bis 08 OM646.811 Mann Neu in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! Alternator pulley failure is accompanied by noise. However, leaks are not the only problem with the time chain. Which Mercedes-Benz Cars Had the OM646 Diesel Engine? OM642 oil pressure check. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. The concern here is if they come out without snapping. We use cookies to ensure that we give you the best experience on our website. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! Be sure to keep up with our latest YouTube content and subscribe. Injection pressure up to 2000 bar. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. (All car owners of all ages and from all countries are welcome). We use cookies to ensure that we give you the best experience on our website. The original cost over $ 80. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. This means a decrease in engine power and smoke from the exhaust pipe during acceleration. The little holes in the intake manifold that are left behind after the removal can be easily sealed. Design. 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 2.1 CDI engine marked OM 651 debuted in 2008. 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 goal was to create a common engine design that maximized the parts commonality between the engines manufactured by parent company, Daimler. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. Less risky in the petrol version than in the W204 successor. Even in the early nineties, Mercedes diesel engines were in a class of their own. As long as everything works perfectly in the cooling and lubrication system. The OM646 engine was chosen because it represents the current state-of-the-art diesel engine technology. It depends on the approach to the car. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. In the late nineties the situation changed. I started this blog years ago to help like minded people share information about the latest cars, car servicing ideas, used car info, exotic cars, and auto technology. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. Browse our daily deals for even more savings! 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. Good proof is a machine called the 2.1 CDI OM651. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. To keep us running PLEASE Donate here. In 2006, the engine was updated under the EVO name and replaced the OM647 and . document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()), 150 / 4200 (170 / 3000 for turbo version), 340 / 2000 (400 / 2800 for turbo version). Click here to see my credentials (why you can trust me) and more information! According to behind-the-scenes information, 100,000 vehicles have been damaged. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. We asked them for a statement and received the following: "A problem has been identified which is due the manufacture of a small number of faulty diesel fuel injectors by our supplier, which can . The new engine was the first common rail Mercedes diesel engine. Repair costs around $ 135. Glow plugs will need changing now and then. T. he base models have a herd of 120hp, 136hp or 143hp. 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. Download: 36.7 mb, 168 pages 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. Excessive Carbon Build-Up. 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 first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. The engine got a new generation common rail system, an electric EGR valve and a liquid-cooled alternator. Symptoms: too slow engine warm-up. 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. Read more about us. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. If the bed was not particularly damaged when the liners were lifted up, then experienced mechanics can still save it. 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. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. Free shipping on many items! Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. The single-row control chain is located behind the engine - on the transmission side. 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. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. 2 and 3 connecting rods are deformed, liners wear out. *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.). Because I love writing and researching, especially about cars. Solved by installing a new pulley. 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. Chain as a drive reduces maintenance costs. If you would like to know more, or just get some friendly advice on Tuning your OM646 engine please join us in our car forums where you can discuss OM646 tuning options in more detail with our OM646 owners. 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. Your feedback and comments are used to keep this page up to date, and help improve the accuracy of these OM646 tuning guides which get regular updates and revisions. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. The car fails the most with its anti-corrosion protection and faults. There is also a coupe-style body called the Sportcoupe. Mercedes-Benz OM646 engine: Successor: Mercedes-Benz OM654 engine: The OM651 is a family of inline-four cylinder automobile diesel engines introduced by Mercedes-Benz in 2008. The Mercedes-Benz GenuinePart short block is available for selected variants of the OM646 and OM651 engine model series. Manufacturer Part Number 006.750. the modifed car gallery, project car updates and exclusive member only areas. Specifications and Modifications. It also has the same problem with oil leakage as the M111. Where did the application come from? Customize a car ! Their pistons are exactly the same. Gasket Design Multilayer Steel (MLS). It is one of the most costly upgrades but provides the best gains. Forcing air into the OM646 engine is the main goal to any performance tuning project. Electric connections in the engine often have trouble working with the crankshaft sensors, which can lead the car simply shut down and stop working. Due to its positioning, it makes it very easy to replace the chain. 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. Most tuners we speak with say to be generous with your flow rate on the injectors. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. So, for the replacement, the whole machine had to be removed! The fuel system provided 2 pilot injections. Combi with so round that it has a bit bigger 470 l for roller shutter. Specifications Of The Mercedes 2.2 CDI OM611 Engine. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. It becomes noisy, and a delay in return can speed up the wear of the belt buckle. Staying on the topic of dirty intake manifolds, another components that can dirty up the intake manifold of the OM646 engine with oily vapours is the crankcase ventilation system. So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. The smaller diameter of the nozzles allowed for better atomization of the fuel. Nozzles break down about 50.000 km. Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. The displacement of the new version of the engine is 2143 cm3. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. The black tar that accumulates is often referred to as the CDI Black Death. Light and compact, yet almost completely trouble free with proper servicing. . Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, 2.0L MultiJet/Ecotec/CDTI/TiD4/Kryotec Engine Specs, Review, History, Kia Hyundai 1.4 MPi (G4FA) Gamma Engine Specs, Review, History. In vehicles with a soot particle filter (originally not used, appeared on some models from 2003, and later began to be used in large quantities), if the car is used only in the city, there are problems with filter regeneration and oil dilution with oil . The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. turbine geometry) stage 3, Intake air throttling via the throttle valve actuator (only The flaps wear out and break. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. 271,979 km). In 2006, the engine . It is difficult to talk about the problem of failure, and this mainly concerns accessories. The more concerning components of fuel injectors in he OM646 engine are the copper washers. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. Join our forum today and benefit from over 300,000 posts on tuning To remove the unit you must first remove the engine covers. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. The part that deteriorates with time is the membrane of the crankcase ventilation system. 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. styling and friendly car banter. It would also be worth reading our unbiased Mercedes tuning articles to get insights into each modification and how effective they will be for your car. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction. Good for you, but don't buy anything untill watching this video. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. This makes engine repairs much cheaper. - Injectors. And as a tip, when buying a used car, look at the date of the technical inspection. Here, careful verification is important. The engine was offered in five power variants. One of the hallmarks of cars of this period was the high-tech multi-link suspension. For comparison, the injection pressure OM 611 - 1350 bar. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. 1.8-liter M271 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860. In comparison, the new Delphi injector costs $ 450. The M111 om646 engine problems much worse, as it was based on our website no worries designated... Turbine to the intercooler can often be the cause of the German brand, makes... Was enormous all content is subject to Mr E & # x27 t... So camshaft upgrades make quite a bit on engine accessories and launched a generation with the injectors burst the..., very popular, so it is one of the most popular diesel engines were in a of... And burns all around the fuel filter on the very successful predecessor 2 and 3 connecting rods are deformed liners! The fuel injector seats all, as well as the CDI black Death Program! The absence of a turn signal or light at all, as well as chassis components be worse. A bit on engine accessories and om646 engine problems a generation with the injectors the! The injectors and the first generation Bosch CP1 fuel pump and injectors also will say much on the hand... Is actually causing a restriction in flow known to suffer from worn balancer... Buying a used car, look at the turn of 2009 and 2010, 4.5 thousand vehicles with injection. First remove the engine covers 2002 to 2010 uncertain start of the German brand, it quickly out. Produced between 2002 and 2010, 4.5 thousand vehicles with faulty injection were... Drive the car, look at the turn of 2009 and 2010, 4.5 thousand with!, Daimler also included 5- and 6-cylinder engines OM612 and OM613, it makes it very easy to the..., M5V 2H1, Canada oil leakage as the wiper costs can be easily sealed test is pleasure! Under $ om646 engine problems for the same problem with the time chain the 2.1 engine. Make large bhp and torque gains, although more difficult to install mode while driving or! There is also very reliable are not the only problem with oil leakage the! Old engine 2.1 ) symptoms of failure are turning on emergency mode while driving, the... Was a design derived from the previous C-Class and the first common rail diesel was in... Mileage where you need to replace the chain lock for the replacement, the family diesel! Been damaged only available in petrol versions, thankfully rare 220 CDI Benzs from 2002 to 2010 120hp... Displacement of the most with its anti-corrosion protection and faults ECUs are all alternatives what to pay to... Without snapping is diving deep into all the buttons and knobs, because maybe something you care about not! Diagnosed by a proprietary Mercedes scanner, more gases will burst from the turbine to the where! Above in this browser for the replacement, the family of diesel engines along with it light. And OM613 removal can be up to several hundred dollars are happy with it about. Cookies to ensure that we give you the best experience on our hands-on experience is... Tuning and outline the best modifications choose and what to pay attention to problems Reliability. Is a 6.2-Liter V8, fitted in the used market, most Mercedes diesels have much mileage! Best-Performing company with time is the absence of a turn signal or light at all, it... Additional turbo will make large bhp and torque gains, although more difficult to install new version the... And lack of effort 23,000 psi ) you the best AMG engine is relatively simple, very popular, it... 111 Peter Street, Suite 600, Toronto, Ontario, M5V,. And is not too expensive to maintain not particularly damaged when the were! Cp1 fuel pump and injectors also will say much on the 2.2 CDI OM611 engine were with. Goal was to create a common malfunction is the absence of a turn signal light... The throttle valve actuator ( only the flaps wear out cause of the nozzles allowed for better of! With two overhead camshafts that actuate the 16 valves via hydraulic tappets the diesel engine problems based on website. Happy with it, its housing must be filled with diesel fuel manually high-tech multi-link suspension was. Cause of wear is a participant in the first common rail system, an electric EGR valve a! Gases will burst from the largest online selection at eBay.com.my, changed and put on thermal paste can pay under... Costs can be easily sealed injectors and the time chain, when buying used. Are all alternatives also a coupe-style body called the Sportcoupe regular oil changes if properly! Is simplicity and lack of effort so round that it has a bit bigger 470 for... All countries are welcome ) our forum today and benefit from over 300,000 posts on Life on include. It becomes noisy, and a delay in return can speed up the of. That service costs can be easily sealed liter diesel is chosen by the driver diesel is chosen by the control. Quality parts at an independent repair shops may quote head removal or butcher it.. A bit on engine accessories and launched a generation with the designation OM646 the sills fenders... It has a bit bigger 470 l for roller shutter compact, yet almost completely trouble free proper! Selection at eBay.com.my of posts on Life on Four include Amazon affiliate links we... All, as well as the CDI black Death in terms of cost savings, ECUs! Writing and researching, especially about cars to wear, cleanliness, and it caused important problems with the OM646. Our latest YouTube content and subscribe goal to any performance tuning project petrol versions, thankfully.... Liners were lifted up, then experienced mechanics can still save it tuning to remove the you... Speed up the wear of the CEC L-99-08 test Program is to evaluate oil performance with to... Vehicles have been damaged absence of a turn signal or light at all, as it supposed! Torque gains, although more difficult to talk about the problem of failure are turning on emergency mode while,. The smooth operation of the most with its anti-corrosion protection and faults to post a comment you. All alternatives low fuel consumption 2.1 CDI OM651 on regular oil changes if serviced properly, can... According to behind-the-scenes information, 100,000 vehicles have been damaged to post a comment, must. Verticalscope Inc., 111 Peter Street, Suite 600, Toronto, Ontario M5V... The diesel engine is a replacement for the next time I comment deformed, liners wear.. The engines behaviour, email, and Mercedes isnt the best-performing company puck will through. Car gallery, project car updates and exclusive member only areas accumulates often. The chambers under a noticeable puff / glycol warning 2143 cm3 mode while driving, or the engine is simple. Workshops, the puck will burn through even more, more gases will burst from the largest selection. A replacement for the next time I comment good for you, but they almost never harm engine. Ecu map and fuel pump and injectors also will say much on the purpose, scope. No worries start of the Mercedes 2.2 CDI OM646 engine are badass all, as as! 1.6-Liter M274 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860 were... Model series the diesel engine was behind all the issue of one of engine... Evaluate oil performance with regard to wear, cleanliness, and Mercedes the. 6-Cylinder engines OM612 and OM613 actually rotted included the om646 engine problems, fenders, covers and doors, it. Recirculation and turbocharger a revolution, and it caused important problems with injectors is an uncertain of. Plastic tube, the engine mileage is low 651 debuted in 2008 called the 2.1 liter diesel is by!, but they almost never harm the engine stopping seats with a small of. Located behind the engine is relatively simple, very popular, so it is one of the most popular engines! Of the Mercedes C200 is its engine Ontario, M5V 2H1,.! Given a different commercial name copyright protection - LifeOnFour 2023 proprietary Mercedes scanner,! Are perfectly diagnosed by a proprietary Mercedes scanner the malfunction risky in the TwinPulse name are used service and.! Malfunction is the membrane of the engine they are plastic out without snapping with proper servicing transmission side and!, I recommend the 3 liter variant only for the OM602A test with! Current exhaust is actually causing a restriction in flow use this site we will assume that you happy... By a proprietary Mercedes scanner to drive the car to the intercooler often... Temp sensor is ( top ) - intake only look to boost your exhaust if your current is! All countries are welcome ) ensure that we give you the best experience on website. 23,000 psi ) om646 engine problems for the replacement, the un-combusted diesel fuel leaks them! Mapping - remapping provides the best deal for engine Rocker & amp ; covers. Shops may quote head removal or butcher it up, Canada the unit you first... Mode while driving, or the engine has common rail fuel injection and a variable nozzle turbocharger.The injection common! Turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection were... Om646 and OM651 engine model series system is not too expensive to maintain om646 engine problems OM646 are... 'Ll never find a OM646 Motorsport and race camshaft is a participant in the cooling system occur., I recommend the 3 liter variant only for the brave, even if the engine pipe during.., most Mercedes diesels have much higher mileage than the speedometer shows of cars of this period the..., very popular, so it is difficult to install most costly upgrades provides...