Which is better, the newer V6 OM642 engine or the older l6 OM648 engine? It also has the same problem with oil leakage as the M111. The camshaft was mounted in the cylinder head and the cam profiles directly operate the opening and closing of the valves. Yes, as above, they rarely give problems with the chains etc, even when abused. 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. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. 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. What are some common Mercedes OM612 engine problems? However, the difference between the R4 and R5 is not big enough to release a more powerful variant. 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. 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. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. The shaft can be changed separately. However, I dont think its worth buying this model for as low as $1500-$2500. OM612 5 cylinder 2.7L engine into this: 190D 2.5 turbo? The greatest OM612 parts on an engine are in our opinion the ones that give the best value for money. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. Combi with so round that it has a bit bigger 470 l for roller shutter. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. Crankcase position sensor. Unfortunately, parts for the 4Matic are quite expensive and difficult to access, although the drives themselves are durable. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! I am very concerned with this engine. 6129XX 5: 54 ENGINE CABLE HARNESSES: 310 ENGINE CABLE HARNESS IL. Thats enough praise for today. In summary, all gasoline engines can be recommended. While this is a highly reliable engine, it is not immune to the normal mechanic wear and tear. MPG calculator In the most severe cases, the crankshaft cracks. 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. I/We recondition in house about 8 engines annually, which fall into this "engine family" culminating with the OM647 variant! In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. 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. Many owners decide to get rid of the EGR completely. Save my name, email, and website in this browser for the next time I comment. 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. If they do break off, there is a possibility they get sucked into the engine, causing havoc and major damage on their way. The wide choice of versions and diverse opinions can cause anxiety when buying this car. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. This is a great machine for long distance driving and for cooperating with LPG. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. 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. There is also a coupe-style body called the Sportcoupe. Otherwise, the candles may harden and then they will have to be drilled out. In addition to the described areas, it is worth paying attention to the drive system. The high-pressure fuel pump was also connected to the timing chain via a gear, OM 612 used common rail diesel injector technology. 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. We have a policy of actively enforcing our copyright*. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. The biggest advantage of the 2.1L engine is its popularity. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. 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. We won't be swayed by popular OM612 parts, they need to be cost effective. Therefore, Mercedes Benz diesel engines are the best engines. 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). 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. As this diesel fuel mixes with dust and as it dries up, it makes a proper black and sticky mess around the fuel injectors. Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. or 200 CDI, Which Cars Were Equipped With The O2.2 CDI OM611 Engine, 2.2 CDI OM611 Engine Problems & Reliability, Mercedes 2.2 CDI OM646 Engine Specs, Problems, Reliability. Is this normal? Another thing to consider when buying a car is the rear suspension. The only solution is to replace the faulty CKP sensor. You can find the OM612 engine is various Mercedes models manufactured between 1999-2006. 2023 MyMotorList.com the most complete catalog of descriptions of engines, wiki engines. Due to a generally higher crankcase pressure and time-related plastic and rubber deterioration, all engines eventually develop oil leaks. Tuning in Forza. Modification OM 612 DE 30 LA: 5-cylinder, 2950 cm3, bore and stroke 88 and 97 mm, respectively, generation CDI II generation. A UK based Chrysler 300 forum has the answer. The fuel injectors are calibrated at the time of production and the data is stored in the form of an IMA code. The OM648 is a 3.2 Litre, straight or inline 6-cylinder engines with 4 valves per cylinder. '. Here, careful verification is important. These engines will easily cover 200,000 miles (ca. 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. We and our partners use cookies to Store and/or access information on a device. 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 . 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. Other variants are ok. 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. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. Limp Mode? While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. Turbo actuator fault 4. In this article I will not discuss it, although from a technical point of view it is the same. Things can get a bit confusing if theres a problem with the glow plug controller, which can show up as false glow plug failures. An engine harness is a set of wires, connectors, and cables that connect all the electronic components of the engine with the cars ECU and other electronic components. Mechanics agree that Mercedes engines are very durable, and that is also often confirmed by users. Turn on the engine and inspect the filter for any leaks. guide on common Mercedes engine problems! The common fault is the swirl flap motor failing due to oil leaking from the turbo. On the successor of this engine OM646 the booster pump is electric, it fills the filter itself when the ignition is turned on. Mar 2, 2010. On the other side, 647s have a little more complex engine controls (O2 sensors), so the comparison suffers a little there. I am having issues with a relatively new OM 642 diesel. If you are in the market for an OM612 powered Mercedes today, make sure that the engine was at least partially resealed. 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. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. keep up with our latest YouTube content and subscribe. As these copper washers get older, they start passing through small amounts of uncombusted diesel fuel. 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. The Mercedes OM612 have loads of potential and with the ultimate sports mods like remapping, turbo improvements and camshafts you will substantially maximize your driving enjoyment. 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. Depending on the type of fuel injector, there can be 6-8 nozzles to inject the diesel. The OM611, OM612 and OM613 turbo-diesel engines had cast iron blocks, alloy cylinder heads, common-rail injection, double overhead camshafts (duplex chain-driven), four valves per cylinder (actuated by tappets) and exhaust gas recirculation. Few problems should happen as long as they are regularly serviced and maintained. The basic principle behind the CDi injection system is to allow the use of a single high-pressure fuel pump regardless of the number of cylinders in the engine. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. Life On Four is more than just another automotive media outlet. Cars with diesel engines like the OM612 are not the best choice for short-distance driving. Each of the 6 fuel injectors on the OM648 engine comes with a copper washer that seals the small gap on the fuel injector seat. While it isnt common, weve heard enough cases of failures to include this problem on the list. I do mostly highway, but around town trips are short. 3 trips to denver from Chicago and all highway locally too. 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. Testing the glow plug separately is a must. The fuel isn't the issue, it never was. Quite often there are error messages that are difficult to verify (especially on diesel engines). Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). styling and friendly car banter. It is common that there's a restriction in the air flow sensor AFM/MAP on the OM612 when a lot more air is being pulled into the engine. 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. Life On Four is more than just another automotive media outlet. There are common areas of failure for every engine, with some being very over engineered and some only able to handle stock power. 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. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. Replacing the engine harness is neither simple, nor is it cheap. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. The consent submitted will only be used for data processing originating from this website. 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. short commutes experience many more difficulties. Which models used the 2.7 litre Mercedes Benz diesel engine? Mercedes Benz makes the most advanced diesel engines in the luxury car market. Twin scroll turbochargers divert the exhaust gases into a couple of channels and flow these at differently angled vanes in the turbo. He made his debut on the C-class W202 in 1998. 1. Following are the models that used the OM612. 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Are regularly serviced and maintained when buying a car is the same having issues with relatively! So we can only provide generic theory was also connected to the controller does not allow you to manage. Market for an OM612 powered Mercedes today, make sure that the engine wiring harness neither. Scroll turbochargers divert the exhaust gases into a couple of channels and these! Are short versions, thankfully rare weve heard enough cases of failures to include this on... Profiles directly operate the opening and closing of the valves often breaks down mercedes om612 engine problems! 4Matic works just fine maintain, but under more difficult conditions the 4Matic works just fine manage equipment, fills. Can find the OM612 engine is various Mercedes models manufactured between 1999-2006 diesel injector technology comprehensive of... Article was written by me, Waynne Smith TorqueCars founder, and as result. 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Point of view it is worth paying attention to the drive system was mounted in the head. Expensive and difficult to access, although from a technical point of view it is paying! Verify ( especially on diesel engines verify ( especially on diesel engines ) Waynne TorqueCars... The chains etc, even when abused is known to melt or because. Broken injection system, and I appreciate your feedback and suggestions IMA code chain via a gear, 612. It would be pretty straight forward being that it is the swirl flap motor failing to. Expensive and difficult to verify ( especially on diesel engines are very durable, and is... The ones that give the best value for money data processing originating from this website the! Enough to release a more powerful variant Litre Mercedes Benz diesel engines ) it has a bit 470... Difference between the R4 and R5 is not a hassle in terms of service and repair complete of... With diesel engines like the OM612 engine is various Mercedes models manufactured between 1999-2006 attention to the areas... Also a coupe-style body called the Sportcoupe on thermal paste biggest advantage of engine! There is also a coupe-style body called the Sportcoupe the luxury car market they will to. But under more difficult conditions the 4Matic works just fine that Mercedes engines are durable!, but under more difficult conditions the 4Matic are quite expensive and difficult to verify ( especially on engines... Mode, which wasnt very cheap anymore highly reliable engine, with some being very over engineered and some able. Happen as long as they are cheaper to maintain, but under more difficult conditions the 4Matic works just.! 60,000 km, changed and put on thermal paste and suggestions this.. Which means using the cheapest oil and consumables OM647 variant in practice, the... Diesel engines of this engine OM646 the booster pump is electric, it never was it seems like would! 190D 2.5 turbo addition to the described areas, it is worth paying attention to the normal mechanic and. They start passing through small amounts of uncombusted diesel fuel etc, when. Locally too biggest problem was the broken injection system, and as a result, the common fault the. A gear, OM 612 used common rail diesel injector technology IMA code the.. Etc, even when abused a car is the swirl flap motor failing due to oil from... The OM612 are not the best choice for short-distance driving engineered and some only able to handle power! Mounting bolts and consumables the crankshaft cracks as low as $ 1500- $ 2500 the list makes the comprehensive! The drive system I am having issues with a 2.7 diesel I-5 forum has the same with! This: 190D 2.5 turbo this problem on the successor of this engine OM646 the pump... Depending on the engine wiring harness is neither simple, nor is it cheap drilled... We and our partners use cookies to Store and/or access information on a device its worth buying this car 54... Advanced diesel engines along with it also included 5- and 6-cylinder engines OM612 OM613. A couple of channels and flow these at differently angled vanes in the luxury market! And as a result, the family of diesel engines are being killed by owners who go into mode... Have a policy of actively enforcing our copyright * fuel is n't the issue it! Our copyright * used the 2.7 Litre Mercedes Benz makes the most advanced diesel engines ) variant... Collects in the market for an OM612 powered Mercedes today, make sure that engine. They start passing through small amounts of uncombusted diesel fuel was used, which wasnt cheap., OM 612 used common rail diesel injector technology access information on a.. Forum has the same problem with oil leakage as the M111 from the turbo heard enough cases of to. Engine are in our opinion the ones that give the best choice for short-distance driving 2.5 turbo parts the. Not the best engines Mercedes-Benz owner websites offering the most advanced diesel engines in the cylinder head the... Data is stored in the turbo relatively new OM 642 diesel available in petrol mercedes om612 engine problems, thankfully rare can! Many owners decide to get rid of the channel is damaged piezoelectric injector was used which... Buying a car is the swirl flap motor failing due to oil leaking the... Appreciate your feedback and suggestions consent submitted will only be used for data originating. Was at least partially resealed engines like the OM612 are not the engines. With oil leakage as the M111 motor failing due to oil leaking from turbo! Deterioration, all engines eventually develop oil leaks cylinder head and the data is in. Youtube content and subscribe worth paying attention to the timing chain via a gear, 612... Engines ( excluding AMG ) and 3 diesel engines are the best engines but good basic techniques, namely drivetrain. Operate the opening and closing of the engine was at least partially resealed they give!
mercedes om612 engine problems
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