See further information and configure your preferences. Click here to see my credentials (why you can trust me) and more information! 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. #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. Unlucky people struggled with cracked heads or intake manifold flap failure, as well as injection system failure, but most users have good memories of this engine. This keeps the car road legal and will flow much better due to it's higher internal surface area and design, so has the added benefit of keeping your car road legal. Any small excerpts and quotes copied must be accompanied by a link to the source material. Engine Mercedes OM612 The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. styling and friendly car banter. MBClub UK is in no way affiliated with Mercedes-Benz, DaimlerChrysler or any of their respective trademarks. This code is stored in the engine control unit which can modulate the injection duration according to the manufacturing tolerance of the individual injectors. 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. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. Low Fuel Economy? The direct fuel injectors are connected to this rail via high-pressure fuel lines. I do mostly highway, but around town trips are short. 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. It is difficult to talk about the problem of failure, and this mainly concerns accessories. The exposed electrical lines can create short circuits and cause concerns like stuck exhaust gas recirculation valves and misfiring. Limp Mode? In this article I will not discuss it, although from a technical point of view it is the same. 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 area that is quite disturbing to users is electricity. Due to a generally higher crankcase pressure and time-related plastic and rubber deterioration, all engines eventually develop oil leaks. The Mercedes OM602 engine is a 5-cylinder diesel engine of 2.5 or 2.9 L (2,497 or 2,874 cc). You will also have full access to Another problem is carbon deposits. Less risky in the petrol version than in the W204 successor. However, this isn't just high iron, this is higher than most engine manufacturers allow. 6129XX 5: 54 ENGINE CABLE HARNESSES: 310 ENGINE CABLE HARNESS IL. Mercedes Benz OM617 could easily do 1,000,000 km without any major repair work. Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. 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. If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. This is very similar to the symptoms here. As this happens, the plastic swirl flaps get stuck or, even worse, break off. We won't be swayed by popular OM612 parts, they need to be cost effective. Note the presence of this solution in the S203 model, namely in the C class car estate. Please see terms for details. At this stage speculation is all we can do until someone figures the problem out. It became very popular in America as the engine offered good power and efficiency, especially after the oil crisis in America. Because I love writing and researching, especially about cars. The camshaft was mounted in the cylinder head and the cam profiles directly operate the opening and closing of the valves. This is a great machine for long distance driving and for cooperating with LPG. Not to mention the fact that you dont want to be on the receiving end of fuel injectors replacements and other fun stuff. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. What are some common Mercedes OM612 engine problems? Problems with injectors start with age and mileage injectors start to pour fuel due to wear. Testing the glow plug separately is a must. Its also not easy to repair, though it costs a lot like a turbo at around $250. Its worth noting that the majority of these issues can be avoided with regular maintenance, care and correct use of the engine. 1 Some help? Double declutch The car fails the most with its anti-corrosion protection and faults. The OM612 5-cylinder diesel engine carried the 270 CDI badge. Carbon deposits lodge on and around the swirl flaps until they eventually block their movement completely. 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. Click here to see my credentials (why you can trust me) and more information! If youre looking for something more powerful, its better to go for the M112 variant, say 170 HP, rather than the comparable 4 cylinder compressor. The OM648 is much easier to work on and there are fewer components that commonly fail. You only need to boost your exhaust if the current exhaust is actually causing a restriction. I am actually starting a case with MB. These are the most common oil leaks locations of the OM648 engine: However, Its important to note that the OM648 engine does not suffer from the same oil cooler leak like the V6 OM642 engine. 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. Each engine responds better to extreme camshaft durations check your engine on a rolling road. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. I/We recondition in house about 8 engines annually, which fall into this "engine family" culminating with the OM647 variant! 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. A complete set for over $770 is worth replacing when absolutely necessary. 9 Will Annihilate Anything - M113K V8. Now there is the 16-valve aluminum cylinder head with two camshafts, hydraulic lifters/tappets, and electronic fuel injection. Compared to its predecessor OM604, it has 30% more power, 50% more torque and 10% less fuel consumption. 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. 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. The ecu map and injectors and fuel pump also have a large bearing on the bhp gains you'll make. How many quarts of oil does a Mercedes Benz E350 take. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. It wasn't even a hot summer. Diesel Remaps Still, that's 1.25 BILLION dollars in repairs. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. 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. 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. NA (naturally aspirated) engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your OM612. 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). It is one of the most costly upgrades but provides the best gains. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. The main symptom of problems with injectors is an uncertain start of the engine. The third weak point is the variable geometry turbo regulator. In fact, they differ only in the number of cylinders. The alternative decat should be considered an off road only mod, as removing a catalyst is illegal in most territories and regions for road registered cars.. The 6-speed manual gearbox is not a very successful design. Keeping an eye on this area and replacing these cheap copper washers every 80,000 miles (ca. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. This entry was Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. 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. 1999 W210 E-Class and 2000 W203 C-Class for Belgium, 1999 W210 E-Class and 2000 W203 C-Class for others than Belgium. This is extremely common on engines that are used for short commutes and engines with blocked up oil separators. It is the main goal to any engine performance tuning job to force more air and fuel into your OM612. Tuning in Forza. Sign up now!!! Mercedes Benz OM 612 was even capable of running on biodiesel or vegetable oil without any major modifications. Change Oil Filter on 2017 Sprinter OM651 engine, Hot start problems 1988 300TE, M013 Gas engine. This is a common issue on the majority of Mercedes CDI diesel engine, and the OM648 is no exception. However, as you can see in this OM612 Engine Harness Remove and Replace owners forum thread, it is sometimes the only possible solution to various engine issues. The Ultimate Guide to Mercedes Engine Problems (Diesel & Gas), Glow plug failures and glow plug controller failure, Fuel injector washer failure and CDI Black Death. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. Is the 2005 Mercedes Benz E55 AMG a good car? 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. short commutes experience many more difficulties. It was also turbocharged with an air-cooled intercooler, the 2.7-litre displacement effortlessly produced more than 160 horsepower. OM602 engine pdf manual download. 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. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. Not only is this insanely hard to clean up, it also bakes in the fuel injectors, making them almost impossible to remove if needed. is around 550 lbs or 250 kilograms. The 2.9 L (2,874 cc) was used in the 310D and 410D Mercedes-Benz T1 and the Phase 1 Mercedes-Benz Sprinter vans (where it was modified for direct injection), the Ssangyong Musso, Korando and Rexton range and even in the 1996-1999 models of the E-class. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). OM612 Engine Harness Remove and Replace. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. The fuel injectors are calibrated at the time of production and the data is stored in the form of an IMA code. Buying such a model is very risky. A bit hard to know whether the oil in an engine meets the MB229.51 spec nor when it was replaced last. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). The pre-glow system of the OM648 is in essence extremely simple and reliable. It may not display this or other websites correctly. 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. Your email address will not be published. Many CDI engine experience this common problem and the OM612 is no exception. 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. ECU Remapping Many owners decide to get rid of the EGR completely. 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. Here, careful verification is important. Read more here! Dodge. This article uses bare URLs, which are uninformative and vulnerable to link rot. The blow by contains unburnt fuel and it mixes with the oil. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. The posted views of our members are in no way the views of MBClub.co.uk or its owners. The engine offers 160hp and 220Nm of torque and the only thing you need to do is change the spark plugs, replace the oil and the occasional filters. 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. Compare: Which Mercedes Cars Have the OM612 Engine? Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. I bought it used one year ago with 16k miles. However, this is one of the third-gen Dodge Durango models you should avoid buying used. It was first used in the OM611 engine which was a 2.2-litre diesel engine producing 140 bhp and OM 612 which was based on the 611 continued to use the same injection system. Modified Car insurance EGR valve problems. We strive to provide the internet with information that will ease your purchase of a new or a used car. Its successor, designated the M272, turned out not to be much worse, as it was based on the very successful predecessor. Important in the description, because the capacity of the engine is less important than the type. The durability of the structure itself is very high. If not, get ready for leaks galore. That seems to be steady trend for years and M1 doesn't worry about it, nor MB USA. Finding a faulty MAF sensor on the OM612 engine is no surprise. In fact, apart from the ones mentioned above, the machine has no major recurring faults. The consent submitted will only be used for data processing originating from this website. 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. There is also a coupe-style body called the Sportcoupe. If youre lucky, they get stuck in the open position, and you wont even know theres something wrong. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. I've heard (from hard core biodiesel fans) that you can solidify your oil running biodiesel. diagnosing flat spots and problems after tuning, 156 PS (115 kW; 154 hp) @ 3800 rpm 330 Nm (243 lbft) @ 14002400rpm, 163 PS (120 kW; 161 hp) @ 4200 rpm 370 Nm (273 lbft) @ 16002800rpm, 170 PS (125 kW; 168 hp) @ 4200 rpm 370 Nm (273 lbft) @ 16002800rpm, 231 PS (170 kW; 228 hp) @ 3800 rpm 540 Nm (398 lbft) @ 2000rpm. We have tips on removing carbon build up. Mercedes Benz OM612.963 (270CDi) engine (2.7, 120 kW) This website is free only for people who do not block ads For example, Firefox browser itself can cause ad blocking, too: Settings / Privacy / Tracking Protection: "enabled". Thank you mattml430 Premium Member If they get stuck in a closed position, they severely impact the operation of the engine. Just like the OM646 engine or the V6 OM642 engine, the OM612 experiences problems with the swirl flaps inside the intake manifold. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. In science speculation is also called an hypotheses, the first step in seeking an understanding of a problem. I am very concerned with this engine. Read more here! Fuel injector washer problems and "Black Death". 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. 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 the shape and material more than the bore size. Common Mercedes OM648 Engine Problems. We strive to provide the internet with information that will ease your purchase of a new or a used car. While the normal M113 was designed by Mercedes-Benz, the M113K is a modified version tuned by AMG and was the last Mercedes engine AMG used before switching to their in-house powerplants. On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. How to reset assyst plus in Mercedes Benz? Page may contain affiliate links. In summary, all gasoline engines can be recommended. Current Merc: 2009 C220cdi sport estate B BigDz Lets find out whos right! 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. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. The system contains 6 glow plugs and a glow plug controller that orchestrates the show. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Well tell you all about as we continue. The fuel isn't the issue, it never was. What was the commercial name of the OM612 engine? 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. How much and is it worth buying a Mercedes C-Class (W203)? 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. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. The wiper the data is stored in the form of an IMA code avoid used... Engine control unit which can modulate the injection duration according to the manufacturing tolerance of engine... Full access to another problem is carbon deposits this stage speculation is all we do! 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Eye on this area and replacing these cheap copper washers every 80,000 miles ( ca and... Information that will ease your purchase of a problem other fun stuff and time-related plastic rubber... Space in the cabin for four adults and the sedans luggage compartment has a modest 455 of.