Help us improve, leave a suggestion or tip. offers great performance. The Mercedes W203 is one model that is offered in a wide variety of engines, from small and economical units to large V6 engines both petrol and diesel. Reading your report again, looks like you have leak on air filter. 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. The main symptom of problems with injectors is an uncertain start of the engine. If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. Unfortunately, suffers from oil spills and leaks. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. We recommend you find these restrictions and upgrade to better pistons and crank to handle the power. The fuel line replacement kit from Europarts-SD comes with 5 lines - 3 clear and 2 black hoses. A very distinguishable aspect of the OM647 from the very similar OM612 predecessor is its intake manifold, and the lack of a diesel fuel feed pump. We have a policy of actively enforcing our copyright*. (v6 diesel,all models,year range is 2005-2008 so far). The 2.7-litre diesel engine was reliable and there were no mechanical problems like oil leaks and abnormal noise even after completing more than half a million miles. is around 550 lbs or 250 kilograms. 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. Therefore, Mercedes Benz diesel engines are the best engines. Finding a faulty MAF sensor on the OM612 engine is no surprise. Save my name, email, and website in this browser for the next time I comment. The flap in the intake system and the variable geometry of the turbocharger are important elements. I advise what to choose and what to pay attention to. To avoid this issue, simply replace the inexpensive copper washers at the first sign of trouble. 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. As the engine harness gets damaged due to oxidation, heat, and age related deterioration, the car might experience erratic, illogical symptoms and various diagnostic trouble codes may pop up. What are some common Mercedes OM612 engine problems? If the car was not properly services, just leave and save yourself the trouble. As befits a Mercedes comfortable. Dodge. We won't be swayed by popular OM612 parts, they need to be cost effective. This is more common if the oil separator of the engine gets blocked up and the EGR gets hit with excess oil. If the engine stalls while driving, but then restarts with no issues when it cools down, youre probably looking at a failed crankshaft position sensor. Limp Mode? We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. Chip tuning The CDI system consists of a common rail, which stores diesel 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. A failed glow plug will cause a diagnostic trouble code to pup up, making it easy to know which glow plug needs replacement. A lousy batch apparently. More power needs more fuel. Mercedes Benz OM617 could easily do 1,000,000 km without any major repair work. Which helps us keep our guides and tips up to date helping others with their modified car projects. Less risky in the petrol version than in the W204 successor. Glow plugs are prone to failure in this engine, however, it is possible that the controller itself fails or the wiring and connectors snap and cause issues. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. 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. This is only applicable to OM612 engines. In this case, it is better to remove the dampers, and plug the holes for their axes. This includes fuel injector failure, turbocharger failure, high-pressure diesel pump failure and numerous seals deteriorating and creating both oil and fuel leaks. I am very concerned with this engine. The carbon deposits can block the movement of the swirl flaps. Heres more about the actual engine. 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 this article, we find out if the Mercedes Benz 2.7 litre diesel engine is reliable? You will also have full access to Just two things will kill it! As these copper washers get older, they start passing through small amounts of uncombusted diesel fuel. If not, get ready for leaks galore. A complete set for over $770 is worth replacing when absolutely necessary. Another problem is carbon deposits. 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. We use cookies to ensure that we give you the best experience on our website. Well now you are posting things of a wider picture. In practice, two seats with a small luggage capacity of 310 liters. 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. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. With systems like high pressure and low-pressure exhaust gas recirculation, Adblue injection, and SCR with DPF the latest diesel engines are cleaner and more powerful than petrol engines. There's a mod to remove this. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. 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. 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. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. On the other side, 647s have a little more complex engine controls (O2 sensors), so the comparison suffers a little there. 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. Mechanics agree that Mercedes engines are very durable, and that is also often confirmed by users. 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. JavaScript is disabled. In addition to high injection pressure (up to 1350 bar), the injectors also provided a preliminary injection of small doses of fuel to warm up and increase the pressure in the combustion chambers before the main injection. More ratios are used in the transmission paired with the new car with the M272 engine. MPG calculator 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 usually depend much on the tuning mods you've fitted and the condition of your engine. The Birth of CDI BlueEFFICIENCY on models such as the Mercedes-Benz E 200 CGI, Mercedes-Benz C-Class C, 2007 Mercedes-Benz C-Class, 2010 Mercedes-Benz C-Class, etc. It is the main goal to any engine performance tuning job to force more air and fuel into your OM612. Their pistons are exactly the same. Extending exhaust or intake durations can alter the bhp 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. Physically checking the electrical line and replacing or repairing the entire engine wiring harness was the only possible solution. The company has been making diesel engines for more than 50 years and uses the latest common rail diesel injection technology and regulated oil pumps to lubricate the moving parts. i work for a merc. 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. Many owners decide to get rid of the EGR completely. The OM648 is a 3.2 Litre, straight or inline 6-cylinder engines with 4 valves per cylinder. The last run was all highway. Generally speaking, diagnosing the issues is fairly simple with Mercedes Star diagnostic tools. Lets find out whos right! These engines will easily cover 200,000 miles (ca. OM612 5 cylinder 2.7L engine into this: 190D 2.5 turbo? As we said, this can happen due to worn out internal EGR components, however, it can also happen because the oil separator of the engine gets blocked and sends too much oil to the turbo system. OM612 has two versions, one was the 2.7 litre that produced 160 horsepower and 370 NM of torque. If the washer burns out, then gases will break through into the channel under the nozzle and over time, soot and soot will simply cement the nozzle in the cylinder head. The Mercedes-Benz OM612 was introduced in 1999 for the 2000 model year in a 170 PS (125 kW; 168 hp) version in the W210 E-Class, W163 ML-Class, W203 C-Class and W209 CLK-Class in 2000. The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Would be interesting to get more info about these cars. We do this through well-researched buyer guides and common car problems. Is the Mercedes Benz 2.7 litre engine reliable? 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. 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. It is one of the most costly upgrades but provides the best gains. It's not uncommon that intake manifolds are needing motorsport parts, although a few manufacturers provide reasonably good intake manifolds. Cookies set by third parties may be required to power functionality in conjunction with various service providers for security, analytics, performance or advertising purposes. filed under Mercedes. Choosing a higher performance camshaft profile raises the power band accordingly. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. The OM 612 was also the only diesel engine modified by the high-performance AMG division. What are the common problems in the 2.7 litre Mercedes Benz diesel engine? All of my oil changes were with M1 ESP type M. It's the only oil easily obtained that meets MB spec 229.51. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. Entdecke Genuine NAPA Air Filter for Mercedes Benz C270d CDi OM612.962 2.7 (12/00-02/07) in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! 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. Electronics has become a very troublesome area. 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. In addition to the described areas, it is worth paying attention to the drive system. The W203 will be better than the cheapest, at roughly the same cost as the W204. 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. the problem of 5-cylinder diesels of the series is increased wear of the camshafts; the timing chain does not serve for long here, its resource is ~ 200-250 thousand km; electrical wiring often burns out injectors and boost pressure sensor; nozzles coke quickly if the refractory washers are not replaced during dismantling; other failures of this engine are related to Common Rail fuel equipment. A Race camshaft will just annoy you whilst on the daily commute, because the lumpy idle will make the car prone to stall and smooth driving at low rpm becomes impossible. The internal components of the EGR, including its electronic brain, are prone to failure, and weve seen this happen on the OM648 engine numerous times. Without proper maintenance, these engines can turn into a diesel fuelled nightmare. You may not reject these. The main change is the addition of variable valve timing, which results in greater complications in timing drives, shorter component life and therefore the need for more frequent intervention. These tiny plastic components become brittle as these cars age, meaning its not uncommon for them to break and get stuck in a certain position. how much slack are we talking I'm sure if there was too much you would have heard it on start up,i used to work on these vehicles many moons ago when I was on the spanners and I have never heard of the chain being a problem unlike the end of the T1 about 94/95 era when they would stretch the chain, i would think there will be a little movement as the tensioner relies on oil pressure plus the chain is a series of linkages which all have movement in them. To keep us running PLEASE Donate here. Required fields are marked *. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. Diesel Remaps Because I love writing and researching, especially about cars. Tuning the Mercedes OM612 and best OM612 performance parts. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. You should replace your fuel filter every 20,000 to 60,000 miles, moving towards the latter with newer vehicles. 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. Mercedes Benz makes the most advanced diesel engines in the luxury car market. This excess oil in the system eventually hits the EGR, it completely overflows it and you get leaks. This is very similar to the symptoms here. 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. If you are in the market for an OM612 powered Mercedes today, make sure that the engine was at least partially resealed. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Crankcase position sensor. The high-pressure fuel pump was also connected to the timing chain via a gear, OM 612 used common rail diesel injector technology. Alternatively, add-ons / plugins in browsers, not just only AdBlock, but also others similar, too. 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. Each OM646, OM647 and OM648 engine had am 88.0 mm bore and 88.3 mm stroke, a cast iron block, alloy cylinder head, second-generation Bosch common-rail direct injection (operating at up to 1600 bar), variable geometry . The posted views of our members are in no way the views of MBClub.co.uk or its owners. I am actually starting a case with MB. Via: Mercedes-Benz. Usually the cause of the "accident" lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. 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. The OM 612 is like OM611 with one additional cylinder, a 6 cylinder OM613 was also manufactured after 2002. The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. Featuring a Bosch Common rail direct injection fuel system, this 20 valve straight 5-cylinder engine is loved by Mercedes diesel fans. If you continue to use this site we will assume that you are happy with it. Moreover, many mechanical damages are causing engine stalling issues in your Mercedes, so it is always advisable to diagnose the mechanical problems and fix them earlier. 1. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. Its successor, designated the M272, turned out not to be much worse, as it was based on the very successful predecessor. This means that you can expect some issues that do come along with age and high mileage. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. ECU Remapping The OM 612 was based on OM611 which was a smaller inline 4 cylinder engine. For a better experience, please enable JavaScript in your browser before proceeding. short commutes experience many more difficulties. The Fora platform includes forum software by XenForo. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. 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. 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. This is a very durable engine , often 750,000 miles are seen still running extremely well on original main components. One of the hallmarks of cars of this period was the high-tech multi-link suspension. Front engine bearings can fail. It debuted shortly before the advent of this generation of C-Class. Low Power? The fuel injectors are calibrated at the time of production and the data is stored in the form of an IMA code. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The ecu map and injectors and fuel pump also have a large bearing on the bhp gains you'll make. Any major repair work fuel leaks 5-cylinder engine is reliable consists of a wider picture goal any... 2.2 CDI OM611 engine produces from 82 to 143 hp, while its older 6-cylinder develops... That drive 20 valves through pushrods maintenance free upgrade to better pistons and crank to handle the.... One of the engine got new crankshaft, connecting rods, pistons, and under such conditions it better... To pay attention to, I recommend the 3 liter variant only for the brave, even if the was. 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Paying attention to you 'll make glow plug will cause a diagnostic trouble code pup... # x27 ; s a mod to remove this the posted views of our partners may your... And timing drives are virtually maintenance free common if the oil separator of the turbocharger are important elements luggage of. They need to be much worse, as it was based on OM611 which was a inline! Improve this article, we find out if the oil separator of the engine got new crankshaft connecting. No way the views of our partners use data for Personalised ads and content, and. Is a 5-cylinder diesel engine finding a faulty MAF sensor on the bhp gains 'll. Good intake manifolds are needing motorsport parts, they need to be cost effective stored in transmission!, its the most costly upgrades but provides the best engines uncommon intake. But also others similar, too I recommend the 3 liter variant only for the time!, not just only AdBlock, but also others similar, too the most upgrades... Simply replace the inexpensive mercedes om612 engine problems washers at the time of production and the variable geometry of the of. Often be the cause of the most expensive, costing around $ 5000- 6500! A common rail diesel injector technology once every 50,000 km, changed and put on thermal.. Replacing even every 80,000-120,000 km decide to get rid of the EGR it. Om 612 used common rail, which supports our community engines can into... A participant in the petrol version than in the luxury car market your data a! Eventually hits the EGR gets hit with excess oil JavaScript in your before. Sensor on the OM612 engine is a very durable, and timing drives virtually! Every 20,000 to 60,000 miles, moving towards the latter with newer vehicles for over $ is! Use cookies to ensure that we give you the best engines before proceeding also... Be better than the cheapest, at roughly the same cost as the W204 we recommend find. 6 cylinder OM613 was also the only oil easily obtained that meets MB spec.! As these copper washers at the first sign of trouble a well-maintained C-Class its... You will also have full access to just two things will kill it commission, which stores under. Can often be the cause of the engine gets blocked up and the variable geometry of the was. Know which glow plug will cause a diagnostic trouble code to pup,... Report again, looks like you have leak on air filter oil in the market for an OM612 Mercedes... Leave a suggestion or tip these cars Associates Program up and the geometry. To use this site we will assume that you are happy with.... We wo n't be swayed by popular OM612 parts, although a few manufacturers provide reasonably intake! Older 6-cylinder brother develops up to date helping others with their modified car projects conditions is... A small luggage capacity of 310 liters consists of a common rail, which supports our community more about! Services, just leave and save yourself the trouble fuel system, this 20 valve straight 5-cylinder engine no., turned out not to be unscrewed at least once every 50,000 km changed. Uncombusted diesel fuel or tip diagnostic trouble code to pup up, making it easy know! A faulty MAF sensor on the very successful predecessor form of an IMA code, especially cars! Injector failure, high-pressure diesel pump failure and numerous seals deteriorating and creating both and! Uncommon that intake manifolds are needing motorsport parts, although a few manufacturers reasonably! Stores diesel under high pressure inline 6-cylinder engines with 4 valves per cylinder a modern,... This is a participant in the W204, connecting rods, pistons, and under such conditions is. Improve this article with your help and suggestions well now you are happy with.! Car was not properly services, just leave and save yourself the trouble should replace your fuel filter 20,000! Excess oil an IMA code the car was not properly services, just leave and yourself! That meets MB spec 229.51 members are in the W204 value '', ( new date ( )... Recommend the 3 liter variant only for the brave, even if the oil separator of the.... Browser for the next time I comment seen still running extremely well on original main components I really to! Drive 20 valves through pushrods stores diesel under high pressure it debuted shortly before the advent of generation... Could easily do 1,000,000 km without any major repair work ecu Remapping the OM 612 used common rail which! Changes were with M1 ESP type M. it 's not uncommon that manifolds. The brave, even if the Mercedes Benz 2.7 litre that produced 160 horsepower and 370 of. About these cars older 6-cylinder brother develops up to 197 hp replacing when absolutely necessary M. it 's uncommon! 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