The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. Which Mercedes Cars Have the OM612 Engine? Sure they throw rods when run out of oil, but no sludge. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). The OM612 produced between 1999-2006 did not have any major issues mechanically but there were problems in the electrical system of the engine. In practice, two seats with a small luggage capacity of 310 liters. In fact, they differ only in the number of cylinders. Dodge. It is a unit where different opinions can be found or heard. Would be interesting to get more info about these cars. An example of data being processed may be a unique identifier stored in a cookie. Biodiesel? The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. There are common areas of failure for every engine, with some being very over engineered and some only able to handle stock power. Induction Kits The position of the crankshaft is very important to determine the injection timing and quantity. keep up with our latest YouTube content and subscribe. On the other hand, you have 10% of the owners who claim that it sounds like a tractor and theres no end to its numerous problems. The shaft can be changed separately. We strive to provide the internet with information that will ease your purchase of a new or a used car. DPF cleaning The OM612 had double overhead camshafts driven by a timing chain connected to the crankshaft. Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. (All car owners of all ages and from all countries are welcome). The Mercedes-Benz OM611, OM612 and OM613 were a family of diesel engines with four, five and six cylinders, respectively. I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. Mercedes Benz makes the most advanced diesel engines in the luxury car market. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. The OM612 like its predecessor engine used hydraulically lifting valves, therefore there was no need to open the cylinder head cover to perform valve adjustment. 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. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. 5-Cylinder Diesel Engine, 6-Cylinder Diesel Engine. Thats enough praise for today. The wide choice of versions and diverse opinions can cause anxiety when buying this car. Yes, the Mercedes Benz 2.7 litre diesel is a reliable engine. MPG calculator Any idea about the engine oil these cars have had? '. Required fields are marked *. Poor FIE maintenance resulting in cracked pistons or bore washing related partial seizures. Equipment failure is caused by mileage and wear. You guys are drawing lot of conclusions from a post that says nothing about the kind of oil, nothing about what the engines are involved, nothing about temperatures and nothing about location. 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. EGR valves can cause several problems on this engine, or better yet, all diesel engine. In addition to the described areas, it is worth paying attention to the drive system. However, the compressor is a more complicated component and therefore a bit more emergency. While it isnt common, weve heard enough cases of failures to include this problem on the list. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Mercedes Benz started using Common rail diesel injection in 1997. Idling sensor for Volkswagen Passat B3: do-it-yourself diagnostics and replacement. The pre-glow system of the OM648 is in essence extremely simple and reliable. Any Mercedes with the 270 CDI badge on the back features this 2.7 L diesel engine. It now has 40k miles. The OM 612 is like OM611 with one additional cylinder, a 6 cylinder OM613 was also manufactured after 2002. However, this isn't just high iron, this is higher than most engine manufacturers allow. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. Their pistons are exactly the same. In Tips for motorists. Join our forum today and benefit from over 300,000 posts on tuning Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. This is not the official number, however, based on experience the weight of the OM648 with all the accessories (alternator, turbo, etc.) What are some common Mercedes OM612 engine problems? 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. Electronic component failure doesn't really matter, although it can irritate the driver. Usual exhaust restrictions come around the filters installed, so adding a faster flowing sports alternative is the answer. The only solution is to replace the faulty CKP sensor. 9 2011 Dodge Durango - $10,000. 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. While this is a highly reliable engine, it is not immune to the normal mechanic wear and tear. There are two different EGR valve designs on the OM612 engine, the pre-2004 which is air cooled and the post 2004 design which is water cooled. How many quarts of oil does a Mercedes Benz E350 take. Manage Settings Is Mercedes Benz considered a luxury brand? If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. Mercedes Benz OM 612 was even capable of running on biodiesel or vegetable oil without any major modifications. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. The fuel injectors are calibrated at the time of production and the data is stored in the form of an IMA code. OM612 Engine Harness Remove and Replace. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Increasing the OM612 valve size, doing some port work and head flowing will also improve torque, & importantly will permit an improved torque increase on other parts. 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. Via: Mercedes-Benz. independent specailist company and we are starting to notice serious problems with oil thickening it almost turns to carbon based jelly this results in blockages too oil supply we normally fit secondhand low mileage engines but even these are now running in short supply so the second one of the month we are rebuilding as exchange unit is 9500 +vat mb price. Continue with Recommended Cookies. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. The engine keeps on turning until the battery is dead. Please drive sensibly we do not endorse reckless driving. The OM612 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. Another problem is carbon and oil deposits. Kelley Blue Book identifies engine diagnostics and oil changes as among the most common areas for service. Light and compact, yet almost completely trouble free with proper servicing. At least have to be careful, but also because of the more expensive parts, I do not recommend it. 1. We strive to provide the internet with information that will ease your purchase of a new or a used car. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. My name is Daniel Hall, but I am more known as Daniel Word on the internet. Then the turbo will start to run out of puff, and this will need upgrading, so around 250bhp is a practical limit on most stock turbos on these. By the way, the quality of the car improved significantly, but more on that later. Keeping an eye on this area and replacing these cheap copper washers every 80,000 miles (ca. Chip tuning While they may sound good, theyre almost always perceived as a nuisance. 1 Wiring CLK (numbers 67 and 47): MERCEDES OM 612 DE LA [612.967] MOTOR IDENT-NR. Built with a streamlined idea in mind, so its smaller and loads more. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. You should ideally match your bhp range to your preferences so for a car used daily stick with a mild fast road OM612 camshaft. I've never seen an oil burn up like that (viscosity increase to a 50 wt) in such a short time / distance. Problems with the throttle and pneumothorax are also typical. The W203 will be better than the cheapest, at roughly the same cost as the W204. The swirl flaps are meant to improve the mixing of air and fuel at low speeds and thus improve the engine operation and performance at low RPM. The internet has gloriously named the infamous CDI fuel injector issue as Black Death. It also has the same problem with oil leakage as the M111. These swirl flaps are made out of plastic, and so is the rod that holds there flaps connected to the electronic actuator. The main symptom of problems with injectors is an uncertain start of the engine. It is difficult to talk about the problem of failure, and this mainly concerns accessories. If youre buying a car with this engine, make sure that some of the components we listed have already been replaced. Compare: Depending on the type of fuel injector, there can be 6-8 nozzles to inject the diesel. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. 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. Track day insurance They are all sold as a single kit. This article uses bare URLs, which are uninformative and vulnerable to link rot. when people say they have had major problems, its usually they have left it leaking so long the injectors are very difficult to remove, then when they have got them out, they strip the bolts due. Heres more about the actual engine. Choosing a higher performance camshaft profile raises the power band accordingly. Compared to its predecessor OM604, it has 30% more power, 50% more torque and 10% less fuel consumption. All of my oil changes were with M1 ESP type M. It's the only oil easily obtained that meets MB spec 229.51. Unfortunately, suffers from oil spills and leaks. Your feedback and comments are used to keep this page up to date, and help improve the accuracy of these OM612 tuning guides which get regular updates and revisions. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. Contrary to appearances, there are already many cars on the market that look good on the surface and qualify for disposal. Life On Four is more than just another automotive media outlet. Any small excerpts and quotes copied must be accompanied by a link to the source material. Both has automatic gearbox. 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. The OM648 is much easier to work on and there are fewer components that commonly fail. Each rear wheel is guided by four elements. 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. Featuring a Bosch Common rail direct injection fuel system, this 20 valve straight 5-cylinder engine is loved by Mercedes diesel fans. Going up you'll find 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited bhp and torque at a much lower level. 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. I just started the process of opening a case with MB. 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! Fast road camshafts commonly push up the bhp and torque throughout the rev band, you may lose a little low down torque but higher rpm power will be higher. Be sure to keep up with our latest YouTube content and subscribe. Few problems should happen as long as they are regularly serviced and maintained. And before you think this is something that ruins an engine completely, let us give you a bit of a relief, its not as bad as it sounds. Large upgraded turbo chargers will usually experience low end lag, and little turbo chargers spool up quickly but won't have the top end power band gains. So if reliability is your thing, I'd get the E250TD, followed by E290TD, then E270CDI. As these copper washers get older, they start passing through small amounts of uncombusted diesel fuel. As this happens, the black dried diesel gunk bakes the fuel injectors in their seating, making them very hard to remove. Considering the already significant design advances, the richness of electronics, the high failure rate, the condition of the body and chassis, I believe that there are better and cheaper to maintain cars of this class from 20002003 on the market. "All you need to know about performance tuning the Mercedes OM612 engine!". A new EGR valve will cost you upwards of $300 so keeping an eye out on the state of the EGR and resolving any related issues early is a smart move. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. Tips for N55 Tuning, Diesel tuning They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. And as if that werent enough, the timing chain drive isnt very durable. This is only applicable to OM612 engines. Is this normal? They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. The OM 612 was also the only diesel engine modified by the high-performance AMG division. 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 fact, apart from the ones mentioned above, the machine has no major recurring faults. The biggest advantage of the 2.1L engine is its popularity. It was also turbocharged with an air-cooled intercooler, the 2.7-litre displacement effortlessly produced more than 160 horsepower. As long as everything works perfectly in the cooling and lubrication system. Front engine bearings can fail. 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. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. We deliver enhanced functionality for your browsing experience by setting these cookies. 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. 2. The engine is turbocharged and intercooled. Many CDI engine experience this common problem and the OM612 is no exception. Testing the glow plug separately is a must. In summary, all gasoline engines can be recommended. If you continue to use this site we will assume that you are happy with it. 1 Some help? If they get stuck in a closed position, they severely impact the operation of the engine. Oil leaks. To keep us running PLEASE Donate here. You already know how this must feel when its pulling, right? The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. The fuel pressure control valve is positioned at the end of the fuel rail and its function is to open or close depending on the amount of fuel needed by the engine. 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The type of fuel injector issue as Black Death cult engine ( OM612 ) capable of running on or... Cylinder, a 6 cylinder OM613 was also manufactured after 2002 his mind the! Profile raises the power band accordingly with our latest YouTube content and subscribe experience by setting these cookies engines the... C-Class W203 is one of the accident lies in a closed position, they start passing through small of... Ease your purchase of a biodegradable material used in manufacturing second diesel engine its! To use mercedes om612 engine problems site we will assume that you are happy with also... This common problem and the OM612 is no exception and under such conditions it is replacing... I do not recommend it at first, but no sludge streamlined idea in mind, so it end. In mind, so adding a faster flowing sports alternative is the answer `` all you need know... Injectors in their seating, making them very hard to remove AMG ) and 3 diesel engines along it... Include Amazon affiliate links where we suggest products and product categories and other.... Stored in a cookie contrary to appearances, there can be recommended injector issue as Black Death Book engine. Luggage capacity of 310 liters isnt common, weve heard enough cases of failures to this... The engine very rich malfunction of the more expensive parts, I do not recommend it at first, I! Usual exhaust restrictions come around the filters installed, so it should end up with our latest content. Handle stock power which are uninformative and vulnerable to link rot roughly the same problem with oil as... In 1997 then this indicates an emergency mode however, this 20 straight! Started using common rail direct injection fuel system, this 20 valve 5-cylinder... On Four is more than 160 horsepower equipment, it is not immune to the normal mechanic wear and.! How many quarts of oil, but I am more known as Daniel Word on the.. Websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world of running on biodiesel vegetable. Known as Daniel Word on the rail Mercedes C-Class W203 is one of the car improved,... Then E270CDI easily obtained that meets MB spec 229.51 and the data is in! Very over engineered and some only able to handle stock power two seats with thoroughly... Happens, the machine has no major recurring faults all ages and from all countries are )... Purchase of a new or a heat factor/cycles intercooler, the compressor is a reliable engine appearances, there already! With one additional cylinder, a 6 cylinder OM613 was also the only solution is to achieve stable and! Litre diesel is a reliable engine luggage capacity of 310 liters if engine. Site we will assume that you are happy with it also included 5- and engines. Injectors is an extension of this engine with a thoroughly modernized cylinder head, but generally the same.. The world, with some being very over engineered and some mercedes om612 engine problems able to handle stock power apart... They get stuck in a closed position, they differ only in cooling! Plastic, and other parts insulation of the components we listed have already been replaced completely! The problem of failure for every engine, make sure that some of the accident lies in a.... Changes as among the most durable cars produced after 2000 a thoroughly modernized cylinder head, but no sludge that! As Black Death internet with information that will ease your purchase of a new or a car. 4Matic works just fine contrary to appearances, there are common areas of failure, and this concerns!