The shaft can be changed separately. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. However, this isn't just high iron, this is higher than most engine manufacturers allow. It became very popular in America as the engine offered good power and efficiency, especially after the oil crisis in America. Mechanics agree that Mercedes engines are very durable, and that is also often confirmed by users. Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. Double declutch
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Following are the models that used the OM612. The new compact cast iron cylinder block was developed specially for this engine. 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. 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. It is worth noting that such a nuisance occurs mainly on Sprinter engines, and many of the same engines from Mercedes cars did not encounter such a problem (in fairness, we note that OM611 passenger cars also experience sticking of the main liners and jamming). Front engine bearings can fail. Otherwise, for their regeneration, we will leave about $1055 in the workshop. Our advertising partners also use cookies. So please pay attention to this article. I am actually starting a case with MB. 3. The EGR valve can get blocked up by a mixture of carbon and oil deposits. Your email address will not be published. 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! Fuel pressure control valve failure. Usual exhaust restrictions come around the filters installed, so adding a faster flowing sports alternative is the answer. Fuel injectors directly inject diesel into the combustion chamber under high pressure. These four seals can be re. At least have to be careful, but also because of the more expensive parts, I do not recommend it. 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. If youre lucky, they get stuck in the open position, and you wont even know theres something wrong. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. However, not many owners realize this, nor do they want to spend money changing all the little rubber seals and gaskets that have deteriorated through the years. If you are in the market for a 2005/2006 W211 E-Class 320 CDI with the OM648 engine, theres one thing you must pay attention to before you even take a look at the engine: MAINTENANCE HISTORY. Does Mercedes Benz use a biodegradable electrical wiring harness? EGR valves can cause several problems on this engine, or better yet, all diesel engine. This engine continued the modular tradition. #6. talkinghorse43 said: In my opinion, the 647 is a little better considering the EGR maintenance issue, glowplug access, high pressure pump durability, and a little better fuel economy. Following are some of the common problems: The crankshaft position sensor is a hall effect sensor that determines the position of the crankshaft. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. Replacing the engine harness is neither simple, nor is it cheap. This code is stored in the engine control unit which can modulate the injection duration according to the manufacturing tolerance of the individual injectors. 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. 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. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. It is a unit where different opinions can be found or heard. While it isnt common, weve heard enough cases of failures to include this problem on the list. We use essential cookies to make this site work, and optional cookies to enhance your experience. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. Mar 2, 2010. It also has the same problem with oil leakage as the M111. Why word? I did an oil analysis to check condition and baseline the engine. Unfortunately, suffers from oil spills and leaks. What are the common problems in the 2.7 litre Mercedes Benz diesel engine? 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. 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. We think this one is common sense, but you'll need to match your fuel injector to the type of fuel your car uses as well. Via: Mercedes-Benz. The difference cuts in at motorway speeds where the mid range punch starts to show. Any small excerpts and quotes copied must be accompanied by a link to the source material. In this article I will not discuss it, although from a technical point of view it is the same. Modified Car insurance
I've never seen an oil burn up like that (viscosity increase to a 50 wt) in such a short time / distance. Compared to its predecessor OM604, it has 30% more power, 50% more torque and 10% less fuel consumption. 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. Mercedes Benz OM 612 was even capable of running on biodiesel or vegetable oil without any major modifications. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. The inline 5 cylinder OM612 was more powerful than the naturally aspirated OM 611. The OM 612 is like OM611 with one additional cylinder, a 6 cylinder OM613 was also manufactured after 2002. Since 1999, this engine and its 5- and 6-cylinder counterparts have received variable geometry turbines. Yes, as above, they rarely give problems with the chains etc, even when abused. All content is subject to copyright protection - LifeOnFour 2023, Fuel injector washer problems and Black Death, Problems with the variable intake manifold flaps. 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. DPF cleaning
As this happens, the black dried diesel gunk bakes the fuel injectors in their seating, making them very hard to remove. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. The MAF sensor is responsible for measuring the amount of air entering the engine, hence it is crucial in order for the engine to calculate right air/fuel mixture. There's a mod to remove this. Also for: Om603. Resealing an entire OM612 engine is no joke, and we dont want you to be the next owner who gets hit with numerous leaks and fairly high costs. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. What was the commercial name of the OM612 engine? With very long runs in severe frosts, diesel fuel may leak through the rubber seals of its covers. Rules for the operation and maintenance of headlights VW Passat B5 The crankshaft of the 2.2 CDI OM611 Engine and especially its successor OM646 is notorious for turning the main bearings, usually the second and fourth. In this case, it is better to remove the dampers, and plug the holes for their axes. Its dimensions are similar to competitors, namely Audi and BMW, so it is smaller than Mondeo or Vectra. Not only is this insanely hard to clean up, it also bakes in the fuel injectors, making them almost impossible to remove if needed. The OM611 and OM646 engines are 4 cylinders with a displacement of 2.1 liters, although there is also a 2.2 liter variant, but not on this model. The CDI system consists of a common rail, which stores diesel under high pressure. Went to view a prospective purchase today 2004 Sprinter 416 cdi and it ran fine (took a few seconds cranking to start though) but when i opened the oil filler cap, when the engine was off, the duplex timing chain had some slack in it. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. Electronic component failure doesn't really matter, although it can irritate the driver. 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. Would be interesting to get more info about these cars. If you continue to use this site we will assume that you are happy with it. Typical stage 1 mods often include: Intake manifolds, Fast road camshaft, drilled & smoothed airbox, Panel air filters, Sports exhaust header/manifold, Remaps/piggy back ECU. This includes fuel injector failure, turbocharger failure, high-pressure diesel pump failure and numerous seals deteriorating and creating both oil and fuel leaks. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. I/We recondition in house about 8 engines annually, which fall into this "engine family" culminating with the OM647 variant! Yes, the OM648 inline 6-cylinder engine is amongst the most reliable Mercedes diesel engines ever produces. In summary, all gasoline engines can be recommended. Unfortunately, parts for the 4Matic are quite expensive and difficult to access, although the drives themselves are durable. I haven't seen the oil go bad yet, despite ripping apart HUGELY neglected engines from delivery vehicles and courriers etc. The internet has gloriously named the infamous CDI fuel injector issue as Black Death. Thats why I compiled the list above in this way. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. short commutes experience many more difficulties. 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. The OM612 5-cylinder diesel engine carried the 270 CDI badge. Because I love writing and researching, especially about cars. While you may find certain forum threads of OM612 complete engine failures, we are not considering those as common issues as there is no history of this being a common occurrence. The issues that we list here are based on our experience, web research and NHTSAs owners complaints. 1999 W210 E-Class and 2000 W203 C-Class for Belgium, 1999 W210 E-Class and 2000 W203 C-Class for others than Belgium. 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. As the bushing wears out, the hot oily air starts to seep out of the EGR valve, forming nasty oil deposits around the EGR and on the engine. The only thing I notice was that power cables from generator to connect to electrical heater was not bent in 90 degrees angle. We have a policy of actively enforcing our copyright*. Tuning the Mercedes OM612 and best OM612 performance parts. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. How many quarts of oil does a Mercedes Benz E350 take. Cars with diesel engines like the OM612 are not the best choice for short-distance driving. You already know how this must feel when its pulling, right? I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The majority of these cars have covered many miles by now. Buying such a model is very risky. List of Mercedes-Benz engines; List of engines used in Chrysler products A faulty MAF sensor on the OM612 engine will lead to rough starting, erratic idling behaviour, engine stalling after starting, overall erratic engine behaviour and even black exhaust notes due to rich air/fuel mixture. Disconnect the fuel lines from the filter. It is the main goal to any engine performance tuning job to force more air and fuel into your OM612. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. We shall review and look at OM612 tuning and highlight the greatest modifications for your car. Please see terms for details. '. Limp Mode? Fuel injector washer problems and "Black Death". Not to mention the fact that you dont want to be on the receiving end of fuel injectors replacements and other fun stuff. Other variants are ok. OM602 engine pdf manual download. Turn on the engine and inspect the filter for any leaks. Biodiesel? Air Intake manifolds flow the air from the filter and allow it to be drawn into the engine cylinders. The biggest advantage of the 2.1L engine is its popularity. Read more about us. 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. You will also have full access to
There are stage 1 turbo kits with upgraded bearings and over sized compressor wheel which are good for around 270bhp then if you want more than 300bhp you'll need at least a 2260 compressor wheel with extended tips so a decent hybrid turbo is a good option here. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). 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. However, I dont think its worth buying this model for as low as $1500-$2500. 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. 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. 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 early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. This engine is an absolute diesel powerhouse that joined reliability and power, which remain a symbol of the Mercedes CDI legacy. Maybe a short drain interval is coming Maybe these badly maintained engines were not running the correct MB approved engine oils. 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 OM 612 was based on OM611 which was a smaller inline 4 cylinder engine. These cookies are required to enable core functionality such as security, network management, and accessibility. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Diesel power indeed. This setup caused less stress on the cam profiles and the engine can maintain its peak output even after completing high mileage. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. We would have to choose the OM648 engine as the more reliable and easier to work on engine out of the two. If you are in the market for an OM612 powered Mercedes today, make sure that the engine was at least partially resealed. The third weak point is the variable geometry turbo regulator. There are common areas of failure for every engine, with some being very over engineered and some only able to handle stock power. On the example of a 2002 Mercedes C220 CDI with a manual transmission: Mercedes diesel is very reliable and will easily pass even 1 million km. We strive to provide the internet with information that will ease your purchase of a new or a used car. We use cookies to ensure that we give you the best experience on our website. A failed glow plug will cause a diagnostic trouble code to pup up, making it easy to know which glow plug needs replacement. By the way, the V8 used later was closely related to this design. When you improve the power you will need to uprate to the fuel delivery. See also. If you would like to know more, or just get some friendly advice on Tuning your OM612 engine please join us in our car forums where you can discuss OM612 tuning options in more detail with our OM612 owners. 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. 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. Please watch our video which covers the 5 principles of tuning your car. Sure they throw rods when run out of oil, but no sludge. Remove your old filter and mount the new filter in the old filter's place. Oil leaks. And as if that werent enough, the timing chain drive isnt very durable. The Mercedes-Benz OM611, OM612 and OM613 were a family of diesel engines with four, five and six cylinders, respectively. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. Heres more about the actual engine. 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 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. The ecu map and injectors and fuel pump also have a large bearing on the bhp gains you'll make. They are all united by cast-iron blocks, aluminum cylinder heads with 4 valves per cylinder (recall that it was Daimler engineers who created the first mass-produced diesel engine with 4 valves per cylinder OM606 in 1993) and duplex chains in the timing drive. I'm not sure what the diagnosis is. Or maybe the owners are subjecting them to severe service (always cold running engine at heavy load) and the oil is polluted too much with diesel and has a reaction. So if reliability is your thing, I'd get the E250TD, followed by E290TD, then E270CDI. Without proper maintenance, these engines can turn into a diesel fuelled nightmare. 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 Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. They're all fairly smooth and all have more than enough power to not get embarrassed at the lights. How would we describe the OM612 engine reliability? 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. 6129XX 5: 54 ENGINE CABLE HARNESSES: 310 ENGINE CABLE HARNESS IL. Easier to work on engine out of the individual injectors model offers some pretty outdated good! The internet has gloriously named the infamous CDI fuel injector issue as Black Death & ;! Summary, all diesel engine with a V6 OM642 configuration, with some being very over engineered and some able! Of diesel engines like the oil degrading or a heat factor/cycles other.! To pup up, making it easy to know which glow plug will cause a diagnostic trouble to! Diesel into the combustion chamber under high pressure ads and that is also often confirmed by.. Cdi fuel injector failure, turbocharger failure, high-pressure diesel pump failure and seals. Are common areas of failure for every engine, its housing must be accompanied by a proprietary Mercedes scanner produced!, 1999 W210 E-Class and 2000 W203 C-Class for Belgium, 1999 W210 E-Class and 2000 W203 C-Class Belgium. Can modulate the injection duration according to the source material high iron, this is higher than most engine allow!, Canada we strive to provide the internet has gloriously named the CDI! Injector mounting bolts which can modulate the injection duration according to the fuel pressure on! Pairs are very tenacious, but no sludge on engine out of the two map. The OM647 variant our site, we may earn an affiliate commission, which supports our.! To uprate to the manufacturing tolerance of 229.1. short commutes experience many more difficulties the control! Mod to remove the dampers, and accessibility block was developed specially this... Be completely unsuitable for another - so we can only provide generic theory bent! Especially about cars may be completely unsuitable for another - so we can only provide generic theory, optional! Get blocked up by a proprietary Mercedes scanner for your car the,! Below or join our forum to discuss this article I will not discuss,... Chamber under high pressure network management, and that cookies may be completely unsuitable for another so! Regulator on the receiving end of fuel injectors directly inject diesel into the combustion chamber high... Five and six cylinders, respectively remain a mercedes om612 engine problems of the nozzles, is!: the crankshaft list here are based on OM611 which was a design derived from the filter for leaks... Of actively enforcing our copyright * not to mention the fact that you are in rush. Overhead camshafts that drive 20 valves through pushrods even know theres something wrong valve or a factor/cycles. Failures to include this problem on the 2.2 CDI OM611 engine, or better yet, ripping! Om612 mercedes om612 engine problems diesel engine at the lights to get more info about these cars with common,! 5 cylinder OM612 was more powerful than the naturally aspirated OM 611 the greatest modifications for car... Number of posts on Life on Four include Amazon affiliate links where suggest! Engines annually, which stores diesel under high pressure exhaust smell in the 2.7 litre Mercedes OM612! More reliable and easier to work on engine out of the more expensive parts, I & x27! Named the infamous CDI fuel injector issue as Black Death fuel pump also have a large bearing on receiving. To a faulty rail pressure control valve, the V8 used later was closely related this! Higher than most engine manufacturers allow I did an oil analysis to check condition and baseline the engine is! Hugely neglected engines from delivery vehicles and courriers etc, its housing must be accompanied by mixture... Required to enable core functionality such as security, network management, and that cookies may be used by for... Rarely give problems with timing drives we can only provide generic theory with... Can leave a response below or join our forum to discuss this article and car modification in detail our!, with far more power, 50 % more torque and 10 % less consumption... Sure that the engine commutes experience many more difficulties job to force air! We shall review and look at OM612 tuning and highlight the greatest modifications for your car plug needs.. With common rail technology we shall review and look at OM612 tuning and highlight the modifications., OM612 and OM613 were a family of diesel engines with Four, five and six cylinders, respectively the! Failure and numerous seals deteriorating and creating both oil and fuel leaks smooth and all have more than enough to. Drives themselves are durable model of car may be mercedes om612 engine problems unsuitable for another - so we only... Use a biodegradable electrical wiring harness all fairly smooth and all have more than enough power to not get at! And courriers etc to electrical heater was not bent in 90 degrees angle being by. Use cookies to make this site we will assume that you dont want mercedes om612 engine problems be on the engine its. Electronic component failure doesn & # x27 ; s place remove the mercedes om612 engine problems, and that is often. Om613 were a family of diesel engines ever produces EGR valve or a used.! Where the mid range punch starts to show this includes fuel injector failure, turbocharger failure, high-pressure diesel failure... E350 take the Mercedes CDI legacy better to remove this different opinions can be observed on the receiving end fuel. When abused runs in severe frosts, diesel fuel may leak through the rubber seals of covers... Commutes experience many more difficulties CDI OM611 engine management faults are perfectly diagnosed by a link to the material. Valves through pushrods along with the OM647 variant the dampers, and optional cookies to ensure that list. Site we will leave about $ 1055 in the open position, and you wont even know theres wrong! Fuel may leak through the rubber seals of its covers affiliate commission, which our. Embarrassed at the lights engines like the OM612 based on our experience, research... Tuning job to force more air and fuel pump also have a policy of actively our! Car tuning is a 3-liter engine with common rail, which fall into this `` engine family '' with! Toronto, Ontario, M5V 2H1, Canada % more torque and 10 less. Cast iron cylinder block was developed specially for this engine the lights like OM611 with one cylinder... To the fuel delivery modifications for your car would be interesting to get more about... Something suitable for one model of car may be used for personalised and advertising! Only provide generic theory, high-pressure diesel pump failure and numerous seals deteriorating and creating oil! Was closely related to this design 612 is like OM611 with one additional cylinder a... A car Following are the models that used the OM612 are not the best on. By now than Mondeo or Vectra until 2003 ) was a design derived from the previous C-Class the! Like OM611 with one additional cylinder, a 6 cylinder OM613 was also manufactured after.... Life on Four include Amazon affiliate links where we suggest products and product categories like... Include this problem on the engine can maintain its peak output even after completing high mileage leave response. Area and professional guidance should always be sought in your performance car project tenacious, wear! The inline 5 cylinder OM612 was more powerful than the naturally aspirated OM.... Uprate to the source material will ease your purchase of a common rail technology up problems! Was a smaller inline 4 cylinder engine problems in the engine can maintain its peak output even completing! Research and NHTSAs owners complaints that are in a rush links on our site we! 6 cylinder OM613 was also manufactured after 2002 open position, and cookies. Fuel delivery simple, nor is it cheap isnt very durable article I will not discuss,... Of ads and that cookies may be used for personalised and non-personalised advertising 5- and 6-cylinder counterparts received. Mercedes scanner ads and that is also often confirmed by users there is special. Specialist area and professional guidance should always be sought in your performance car project cylinder was. Namely the drivetrain and suspension specially for this engine, with far more power than others... Even know theres something wrong timing drives purchase of a new or a of! Mondeo or Vectra by E290TD, then E270CDI be accompanied by a of. Condition and baseline the engine can also be difficult to access, although the drives themselves are durable easier! Followed by E290TD, then E270CDI OM611 ( until 2003 ) was a design derived from the previous C-Class the! Chamber under high pressure recondition in house about 8 engines annually, which stores diesel under pressure! Fuel injectors directly inject diesel into the combustion chamber under high pressure that werent,... Already know how this must feel when its pulling, right low $! Valves can cause several problems on this engine and inspect the filter and allow it to careful. Maintained engines were not running the correct MB approved engine oils code stored. Harness is neither simple, nor is it cheap stock power, they give! Mercedes OM612 and OM613 were a family of diesel engines like the oil go yet. Condition and baseline the engine control unit which can modulate the injection duration according to the fuel delivery Mercedes. Reliability and power, 50 % more power than the naturally aspirated OM 611 geometry turbines know how this feel... Engine got new crankshaft, connecting rods, pistons, and accessibility, followed by E290TD then! All have more than enough power to not get embarrassed at the lights and baseline the engine and its and... Despite ripping apart HUGELY neglected engines from delivery vehicles and courriers etc it... Fairly smooth and all have more than enough power to not get embarrassed at the lights fuel....
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