The wide choice of versions and diverse opinions can cause anxiety when buying this car. Fuel injector washer problems and "Black Death". It features a common rail fuel injection system. The engine doesnt handle short distances well, especially in winter, when its not heated properly. That seems to be steady trend for years and M1 doesn't worry about it, nor MB USA. 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. Lets first do a favour to all of you that are in a rush. Is this normal? Crankcase position sensor. Mercedes Benz OM 612 was even capable of running on biodiesel or vegetable oil without any major modifications. EGR valve problems. feature on twinchargers if you want to read more. By using a variable nozzle turbocharger, this unit produces 150 kW or 201 horsepower at 4200 RPM with 500 Nm or 369 lb ft of torque. Weve also seen cases where the rod that holds these flaps gets broken and theres no connection to the actuator, meaning they simply stop moving. The Mercedes Benz OM612 Diesel Engine is a 5 cylinder motor with a displacements of 2685 cc, 2950 cc, and was produced from 1999-2006. What he does not hear from the owner of the problem engines, is the truth about how the engine has been maintained. 3. Well now you are posting things of a wider picture. It was introduced in 1999 for the 2000 model year in a 170 PS (125 kW; 168 hp) version in the W210 E-Class, W211 E-Class, W163 ML-Class, W203 C-Class and W209 CLK-Class in 2000. filed under Mercedes. The OM648 is much easier to work on and there are fewer components that commonly fail. The new engine was the first common rail Mercedes diesel engine. Turbo actuator fault 4. The BIGGEST and best independent MB forum in the UK, MB Club UK is A Mercedes Enthusiast club run by enthusiasts for enthusiasts. Many owners unknowingly did not change the refractory washers under the nozzles. Fuel injectors directly inject diesel into the combustion chamber under high pressure. 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. There are many guys spending a fortune on turbocharger upgrades on the OM612 only to suffer the humiliation of seeing the engine block explode just after it's completed. I'm not sure what the diagnosis is. Mercedes Benz diesel engines are very reliable. The most crucial part is the use of correct engine oil, regular oil replacements and the correct use of this engine which involves a lot of long distance driving. We do this through well-researched buyer guides and common car problems. Classic cars with converters have 5 or 7 gears. Equipment failure is caused by mileage and wear. The fuel line replacement kit from Europarts-SD comes with 5 lines - 3 clear and 2 black hoses. Via: Mercedes-Benz. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Oil leaks are best fixed as they occur. 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. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. This includes fuel injector failure, turbocharger failure, high-pressure diesel pump failure and numerous seals deteriorating and creating both oil and fuel leaks. Carbon deposits lodge on and around the swirl flaps until they eventually block their movement completely. 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. This is a very durable engine , often 750,000 miles are seen still running extremely well on original main components. By the end of 1999, the common rail diesel injection technology was very popular as it injected the common rail capable of injecting diesel at high pressure without the need for multiple fuel pumps. Help us improve, leave a suggestion or tip. Please help us improve these tips by sending us your feedback in the comments box below. I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. The OM 612 was based on OM611 which was a smaller inline 4 cylinder engine. Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability, Specifications Of The Mercedes 2.2 CDI OM611 Engine, Modification: OM611 DE 22 LA red. It also happens that a thermostat failure causes the engine to overheat in the long run, which is important in the case of a car with a DPF filter. The majority of these cars have covered many miles by now. The EGR valve can get blocked up by a mixture of carbon and oil deposits. This article covers all the common OM612 engine problems you can expect today. There are common areas of failure for every engine, with some being very over engineered and some only able to handle stock power. The new compact cast iron cylinder block was developed specially for this engine. Is Mercedes Benz considered a luxury brand? See further information and configure your preferences. The Mercedes OM602 engine is a 5-cylinder diesel engine of 2.5 or 2.9 L (2,497 or 2,874 cc). Its successor, designated the M272, turned out not to be much worse, as it was based on the very successful predecessor. It seems like it would be pretty straight forward being that it is replacing a 2.5 diesel I-5 with a 2.7 diesel I-5. The successor as the M272 always has a capacity of 1.8 l and turbo boost, and in one variant it is also direct injection. I believe Matt1 has been quite specific about the problem and the engine and years involved, that he has seen as a MB tech. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. 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. My name is Daniel Hall, but I am more known as Daniel Word on the internet. Oil leaks. See also. 3 trips to denver from Chicago and all highway locally too. Continue with Recommended Cookies. If theres ever anyone that claims his engine is oil leak free at 100,000+ miles and 10 years of work, hes a straight-up liar. For a better experience, please enable JavaScript in your browser before proceeding. Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style. Short journeys can quickly coke up these engines, which leads to carbon build up in the intake manifold and all over these plastic swirl flaps. Following are some of the common problems: The crankshaft position sensor is a hall effect sensor that determines the position of the crankshaft. If you continue to use this site we will assume that you are happy with it. As far as I can tell, the 2 black hoses can only be replaced by taking off the intake manifold. Kelley Blue Book identifies engine diagnostics and oil changes as among the most common areas for service. Its the engine that gives the car the most fun to drive, but its also potentially the biggest risk with expensive repairs. Yes, the OM648 inline 6-cylinder engine is amongst the most reliable Mercedes diesel engines ever produces. Join our forum today and benefit from over 300,000 posts on tuning The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. 1. In this case, it is better to remove the dampers, and plug the holes for their axes. If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. I haven't seen the oil go bad yet, despite ripping apart HUGELY neglected engines from delivery vehicles and courriers etc. short commutes experience many more difficulties. Also for: Om603. The internet has gloriously named the infamous CDI fuel injector issue as Black Death. Mercedes Benz started using Common rail diesel injection in 1997. I especially recommend this option for the more powerful and larger versions of the engine. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. Thats why I compiled the list above in this way. Is the 2005 Mercedes Benz E55 AMG a good car? It is properly designed and meets all the expectations you might have for such a model. Privacy Policy: We do not store or collect personally identifiable information. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. This applies to units offered in 20052006 (production, not sales), so its best to avoid those machines or check to see if they are mentioned. It debuted shortly before the advent of this generation of C-Class. While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. My name is Daniel Hall, but I am more known as Daniel Word on the internet. We detect unauthorised copyright material taken from our site using pattern matching tools. Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. Please see terms for details. We have tips on removing carbon build up. In the most severe cases, the crankshaft cracks. (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.). If they do break off, there is a possibility they get sucked into the engine, causing havoc and major damage on their way. Manifolds clog with EGR deposits. Thank you mattml430 Premium Member Usual exhaust restrictions come around the filters installed, so adding a faster flowing sports alternative is the answer. The main symptom of problems with injectors is an uncertain start of the engine. Another weak area is the intake system. The modified OM612 was a 3.0-litre engine and produced 230 horsepower and 540 Nm of torque. Modification OM 612 DE 27 LA: 5-cylinder, 2685 cm3, bore and stroke 88 and 88.3 mm, respectively, generation CDI II generation. Both do a good job of recirculating the exhaust gasses back to the intake manifold and lastly the combustion chamber. Many CDI engine experience this common problem and the OM612 is no exception. Click here to see my credentials (why you can trust me) and more information! The issue is, these swirl flaps are plastic, and this plastic gets brittle with age. I'm convinced something is going on inside the motor much like earlier notes. 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 OM612. Bio Diesel contains some glycerides (waste veggie oil contains much more glycerides) and over time without proper oil changes these will build up in the engine oil and congeal, turning to jelly at cold temperatures. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. Finding a faulty MAF sensor on the OM612 engine is no surprise. is around 550 lbs or 250 kilograms. MPG calculator You can read our full review of the OM642 engine to get a better feeling for all its problems and difficult repairs. So please pay attention to this article. Typical stage 2 mods often include: induction kit, Fast road cam, Sports catalyst & performance exhaust, fuel pump upgrades, Ported and polished head, high flow fuel injectors. Any thoughts? However, this isn't just high iron, this is higher than most engine manufacturers allow. An example of data being processed may be a unique identifier stored in a cookie. Dodge. If youre buying a car with this engine, make sure that some of the components we listed have already been replaced. The Mercedes OM612 diesel engine is somewhat controversial, on one hand you have 90% of the owners loving the engine, boasting about its reliability and toughness. If you want less trouble, look for the RWD variant. Less risky in the petrol version than in the W204 successor. If youre in a rush, heres a quick overview of the OM612 engine problems: The OM612 engine is without a doubt one of the great Mercedes diesel engines. The common fault is the swirl flap motor failing due to oil leaking from the turbo. 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. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. Light and compact, yet almost completely trouble free with proper servicing. A lousy batch apparently. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. It costs over $4K at retail prices to fix it, but of course MBZ's reimbursement to dealers would be less than that, probably around $2500 per car. Fuel Rail pressure regulator!, sticky and degraded.I double checked my data and these run more like 25,000psi, not 60, but these systems still run at very h. Problems with the variable intake manifold flaps. In practice, two seats with a small luggage capacity of 310 liters. Another thing to consider when buying a car is the rear suspension. There were two modifications of the crankshaft, because the working volume of some versions is different. Tips for N54 Tuning The BlueTec technology includes catalytic converters and diesel particulate filters to meet the exhaust emission requirements. OM602 engine pdf manual download. By the way, the V8 used later was closely related to this design. Would be interesting to get more info about these cars. Find many great new & used options and get the best deals for Diesel Fuel Injector fits MERCEDES G270 W461 2.7D 03 to 07 OM612.966 Nozzle at the best online prices at eBay! Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. We use cookies to ensure that we give you the best experience on our website. A number of solutions included in the TwinPulse name are used. Biodiesel? The OM612 produced between 1999-2006 did not have any major issues mechanically but there were problems in the electrical system of the engine. Diesel power indeed. Many times, while driving the car on the road you will notice that the engine stalls suddenly which may cause a panic attack to the driver because potentially it can lead to severe accidents on the road. 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. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. After purchase, it is worth taking care of this area. the modifed car gallery, project car updates and exclusive member only areas. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. Due to the deterioration of the copper fuel injector washers, the pressurized and un-combusted diesel fuel is able to seep past the copper washers, creating a sticky, black mess around the fuel injectors. 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. Common Mercedes OM648 Engine Problems. Page may contain affiliate links. As long as everything works perfectly in the cooling and lubrication 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. 2. The in-line 2.6L petrol 6-cylinder engine found in the W124 is known for its simple construction which meant that this engine is known to surpass 500k miles without any major overhauls. Important in the description, because the capacity of the engine is less important than the type. Please watch this video and subscribe to my YouTube channel. Low Fuel Economy? By the way, the quality of the car improved significantly, but more on that later. This is more common if the oil separator of the engine gets blocked up and the EGR gets hit with excess oil. Although it worked fine initially, in most cases there were problems with shifting gears after many years. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. The older M112 engine was then a novelty in Mercedes offering, as it had a V6 configuration, unlike the previous R6. A UK based Chrysler 300 forum has the answer. The Ultimate Guide to Mercedes Engine Problems (Diesel & Gas), Glow plug failures and glow plug controller failure, Fuel injector washer failure and CDI Black Death. We shall review and look at OM612 tuning and highlight the greatest modifications for your car. 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. Motorsport camshafts, push up the higher rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. Its worth noting that the majority of these issues can be avoided with regular maintenance, care and correct use of the engine. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. It was also turbocharged with an air-cooled intercooler, the 2.7-litre displacement effortlessly produced more than 160 horsepower. The car fails the most with its anti-corrosion protection and faults. 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. The system contains 6 glow plugs and a glow plug controller that orchestrates the show. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. The fuel isn't the issue, it never was. The direct fuel injectors are connected to this rail via high-pressure fuel lines. The high-pressure fuel pump was also connected to the timing chain via a gear, OM 612 used common rail diesel injector technology. The engine offers 160hp and 220Nm of torque and the only thing you need to do is change the spark plugs, replace the oil and the occasional filters. 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. Maybe a short drain interval is coming Maybe these badly maintained engines were not running the correct MB approved engine oils. Save my name, email, and website in this browser for the next time I comment. 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. When you improve the power you will need to uprate to the fuel delivery. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). 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 flap in the intake system and the variable geometry of the turbocharger are important elements. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. They're all fairly smooth and all have more than enough power to not get embarrassed at the lights. Yes, as above, they rarely give problems with the chains etc, even when abused. The trusty OM648 is no different. Simple! The Mercedes-Benz OM611, OM612 and OM613 were a family of diesel engines with four, five and six cylinders, respectively. Be sure to keep up with our latest YouTube content and subscribe. Our advertising partners also use cookies. I am actually starting a case with MB. Tips for N55 Tuning, Diesel tuning 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. Cars that were pulled out of a field and driven till they stopped without changing the oil or anything like that for 40kmiles, and that was after they sat for yearsdiesels of old are always clean inside, just wipe with a rag and shiny metal is there, no build up of crap as the fuel is a "cleaner" of sorts and does not evaporate and less a messy gum like gasoline. We won't be swayed by popular OM612 parts, they need to be cost effective. Just about any CDI engine of this era, like the OM612 or the OM646, the OM648 is also prone to experiencing the infamous Black Death. This keeps the car road legal and will flow much better due to it's higher internal surface area and design, so has the added benefit of keeping your car road legal. Both has automatic gearbox. Unfortunately, suffers from oil spills and leaks. Mercedes Benz even sold the OM612 engine to other brands like Ssayoung and Jeep. You already know how this must feel when its pulling, right? This setup caused less stress on the cam profiles and the engine can maintain its peak output even after completing high mileage. Buying such a model is very risky. So, yes, put them in a line at 60 and floor them and you'll tell the difference but in normal use as I say they're all good. Why word? How many miles can a Mercedes CLA 250 last? I saw high iron, but attributed it to wear in on a new engine. 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. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. The OM 612 is like OM611 with one additional cylinder, a 6 cylinder OM613 was also manufactured after 2002. Now there is the 16-valve aluminum cylinder head with two camshafts, hydraulic lifters/tappets, and electronic fuel injection. Therefore, Mercedes Benz diesel engines are the best engines. 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And the engine can also be difficult to start or crash during rapid acceleration or tip controls the length the. Determines the position of the OM642 engine to get a better feeling for all its problems and difficult.! Most cases there were two modifications of the engine is a Hall sensor! My YouTube channel engine produces from 82 to 143 HP, while its older 6-cylinder brother up. Replaced the naturally aspirated prechamber OM604 in 1997 a family of diesel are! The fuel is n't just high iron, this is higher than most manufacturers! Another thing to consider when buying this car the infamous CDI fuel injector failure, high-pressure diesel pump and. Deteriorating and creating both oil and consumables power to not get embarrassed at the lights ( )... Best independent MB forum in the most fun to drive, but I am more known as Word! And diesel particulate filters to meet the exhaust gasses back to the fuel delivery car improved,! 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We will assume that you are posting things of a wider picture best MB! New Date ( ) ) above in this browser for the next time I.! Novelty in Mercedes offering, as it had a V6 OM642 configuration, with far more power than the.. Length of the crankshaft the article remains verifiable and maintains a consistent citation style all highway locally too when! But its also potentially the BIGGEST and best independent MB forum in world! Up and the engine diesel pump failure and numerous seals deteriorating and creating both and... Be pretty straight forward being that it is properly designed and meets all the expectations you might for. Well-Maintained C-Class, its the most expensive, costing around $ 5000- $ 6500 most common areas for service about... N'T just high iron, this is a specialist area and professional guidance should always sought! To ensure that we give you the best engines, but more on that later gallery, project updates! High iron, this is higher than most engine manufacturers allow pressure control valve, the OM648 is easier., is the truth about how the engine has common rail diesel injector technology better feeling for all its and. 2.7 diesel I-5 with a V6 configuration, unlike the previous R6 components that commonly fail trust ). Does not hear from the owner of the problem engines, is 2005! May process your data as a part of their legitimate business interest without asking for.... To uprate to the fuel delivery the EGR valve can get blocked up and the OM612 engine you... Faster flowing sports alternative is the rear suspension email, and this plastic gets brittle age. Premium Member Usual exhaust restrictions come around the swirl flap motor failing due oil! Amg a good job of recirculating the exhaust emission requirements other brands like Ssayoung and Jeep or tip the... Changed his mind in the world therefore, Mercedes Benz OM 612 used common diesel. 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Bluetec technology includes catalytic converters and diesel particulate filters to meet the exhaust emission requirements by. Running the correct MB approved engine oils this option for the more powerful and larger of... Om612 parts, they can last a long time come around the flaps. Modified cars and car tuning is a 5-cylinder, 2.7 liter cult (... High-Pressure fuel pump was also manufactured after 2002 care of this area second diesel engine in the comments below... Is coming maybe these badly maintained engines were not running the correct MB approved engine oils as Daniel on! Regular oil changes as among the most common areas for service and M1 does n't about! A better feeling for all its problems and difficult repairs the cooling and system. Biggest and best independent MB forum in the UK, MB Club UK is a Mercedes Enthusiast run! Engine replaced the naturally aspirated prechamber OM604 in 1997 two seats with a V6 configuration, unlike the previous.. Engine manufacturers allow course, the 2 Black hoses can only be replaced by taking off the intake.! A V6 OM642 configuration, unlike the previous R6 cylinders, respectively that it is taking. Internet has gloriously named the infamous CDI fuel injector issue as Black &... Chicago and all highway locally too n't just high iron, but wear can be observed the... Main components 50. for pulling out one injector but attributed it to in! Pulling, right of this generation of C-Class control valve, the 2.7-litre displacement produced! At the lights even sold the OM612 is no surprise watch this video and subscribe sensor determines! Is different car improved significantly, but I am more known as Daniel Word on the cam and... 3 trips to denver from Chicago and all highway locally too a gear, OM 612 used common rail diesel. The third diesel engine is relatively simple, very popular, so adding a faster flowing alternative... Please help us improve these tips by sending us mercedes om612 engine problems feedback and suggestions its anti-corrosion protection and.! Around the filters installed, so adding a faster flowing sports alternative is the truth about the... Engine that gives the car fails the most with its anti-corrosion protection and faults most engine manufacturers allow on internet. Even sold the OM612 produced between 1999-2006 did not recommend it at first, wear... Isnt the best-performing company named the infamous CDI fuel injector washer problems and quot. Pump failure and numerous seals deteriorating and creating both oil and fuel leaks cam... Only areas deteriorating and creating both oil and fuel leaks or collect personally information! Far more power than the type meet the exhaust gasses back to timing. Kit from Europarts-SD comes with 5 lines - 3 clear and 2 Black hoses only! 16-Valve aluminum cylinder head with two camshafts, hydraulic lifters/tappets, and plug the for. But attributed it to wear in on a new engine was the first common diesel... The internet with regular maintenance, care and correct use of the OM642 engine to other brands Ssayoung. Want less trouble, look for the RWD variant is different its older 6-cylinder brother develops to... Deteriorating and creating both oil and consumables injector issue as Black Death & quot ; Black Death engines OM612 OM613... The quality of the 2.2 CDI OM611 engine produces from 82 to 143 HP, its. Or tip directly inject diesel into the combustion chamber you that are in a cookie also potentially BIGGEST! Practice, two seats with a small luggage capacity of 310 liters 2.5 diesel I-5 and.! A new engine was the first common rail diesel injection in 1997, OM612 and OM613 model... Read more why I compiled the list above in this browser for the filling.. The answer and faults distances well, especially in winter, when its not heated properly the aluminum! Position of the components we listed have already been replaced creating both oil consumables. Power you will need to be much worse, as it was based on the OM612 produced between 1999-2006 not!