As a rule of thumb add 20% when fitting an injector, this takes into account injector deterioration and gives a little spare capacity should the engine require more fuel. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. In the late nineties the situation changed. The transmission has a non-durable but fully replaceable gear selection mechanism. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. Please help us improve these tips by sending us your feedback in the comments box below. To remove the unit you must first remove the engine covers. Plastic painting tips for car interior and exterior.Read more Tuning the 150bhp Diesel Astra Sport HatchRead more MPG calculator UK miles per Gallon calculate MPGRead more / UK Modifying & Tuning / Car Mods Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. The engine was offered in five power variants. Due to its positioning, it makes it very easy to replace the chain. However, if the con rod damage is ignored or if the car is driven with exceeded maximum load, it isnt uncommon that the crankshaft develops micro cracks. The I especially recommend this option for the more powerful and larger versions of the engine. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. Experienced mechanics recommend replacing the fitting. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. styling and friendly car banter. Low Power? Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Unfortunately, this is also a series of problems, some of which end in . Chassis Cab 4. turbo to intercooler. OM642 oil pressure check. Sports exhausts equal out the flow of gases through the engine. 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 OM646. The successor as the M272 always has a capacity of 1.8 l and turbo boost, and in one variant it is also direct injection. The Mercedes-Benz OM651 was a four-cylinder turbo-diesel engine that was first introduced in October 2008 and replaced the four-cylinder OM646 and six-cylinder OM642 engines. 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. And the regulator in the ECU allows you to accurately dose the fuel, avoiding overflow. 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. The four-cylinder in-line engine is the successor to the OM-646 four-cylinder series and is also intended to replace the weaker versions of the V6 OM 642 engine . Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. 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 displacement of the new version of the engine is 2143 cm3. Please watch this video and subscribe to my YouTube channel. The first generation Bosch CP1 fuel pump is also very reliable. Jump To Article. New replacement costs at least $ 405. This makes engine repairs much cheaper. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. 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. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. 3. It was available with a variety of petrol and diesel engines, including: 1.6-liter M274 I4 engine; 1.8-liter M271 I4 engine; 2.1-liter OM646 diesel I4 engine; 2.1-liter OM651 diesel I4 engine; 2.5-liter M272 V6 engine; 3.0-liter M272 V6 engine; 3.5-liter M276 V6 . Engine Code Volume Power Twisting Installed Years of issue; OM611 FROM 22 LA: 611.960: 2148 . Regulators regenerate most often. Forza 5 tuning guide. In addition to the described areas, it is worth paying attention to the drive system. In recent times the market of turbo units is always moving on and we now see variable vane turbo units, allowing the vane angle is altered according to speed to lower lag and increase top end performance. 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. We strive to provide the internet with information that will ease your purchase of a new or a used car. The repair costs exceed half a billion euros. The original cost over $ 80. Minibus 3.3. On most factory exhausts you should find that the exhaust flow rate is still good even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. 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. These four seals can be re. Higher pistons and short connecting rods were used. Many owners unknowingly did not change the refractory washers under the nozzles. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. Well, the drive is located on the side of the gearbox. The Mercedes OM642 are fantastic to work on and with the best sports mods like a remap, turbo kits and camshafts you will really enhance your driving opportunities. Soon it turned out that another defect involved the time chain seal. Technical Data. These Mercedes Engines Won't Last 100,000 Miles!Mercedes Benz are absolutely amazing luxury cars, but there are some engines that could cause you some pretty. Also, the cylinder head camshaft drive often wears out. Some of our members have had issues with flat spots or glitches after applying mods and upgrades or tuning, this is not usually related to this engines design, so instead see our article on diagnosing flat spots and problems after tuning which should help you get the bottom of this issue. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. 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. On this Wikipedia the language links are at the top of the page across from the article title. Big turbo chargers commonly experience a bottom end lag, and low capacity turbo chargers spool up much more quickly but don't have the top end bhp gains. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. Weak spots, Issues & problem areas on the OM646. 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. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. During 9 years of production, OM651s 2.1 CDI engine was installed on the following models: Although in 2008 the modern Mercedes engine seemed to be the pinnacle of technical possibilities, the first black clouds began gathering overhead just months after the premiere. Help us improve, leave a suggestion or tip. Otherwise, the candles may harden and then they will have to be drilled out. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. Greeting. bar, VTG turbocharger with electrical actuator motor, (variable The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. 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. Unfortunately, suffers from oil spills and leaks. Solved by replacing the chain with a new one. The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. OM617 engine 3. Mercedes-Benz OM646 engine: Successor: Mercedes-Benz OM654 engine: The OM651 is a family of inline-four cylinder automobile diesel engines introduced by Mercedes-Benz in 2008. Replacing the timing chain is no more expensive than the belt on a typical car of this class. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. The concern here is if they come out without snapping. W639 Vito 111 CDI, 2.0 CDI, 111 CDI (2003 2010), Plastic swirl flaps in the intake manifold tend to break down with age, Blocked or damaged crankcase ventilation system, Oil leaks around the crankcase ventilation module, Leaky injector seals lead to CDI Black Death. Depending on the purpose, the diesel engine was given a different commercial name. In addition, a new revised turbocharger and charge air intercooler were installed. 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. The 2.2-liter in-line diesel engine Mercedes OM646 was produced from 2002 to 2010 and was installed on a number of models of the German concern, including commercial minibuses. Rapid delivery as usually in stock. The flap in the intake system and the variable geometry of the turbocharger are important elements. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, Honda 3.5 V6 J35 Engine Specs, Problems, Reliability. The more powerful version of the engine uses piezo injectors Delphi. Since a special stand is required. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric fuel pump, exhaust gas recirculation, particulate filters,[1] and Euro 4 emission standard compliance (from 2003). In summary, all gasoline engines can be recommended. As that happens, the blow-by from an engines crankcase is no longer being routed back to the combustion chamber of the engine, instead it stays trapped in the engine, dirtying up everything in its way, including the intake manifold. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. The engine OM 651 is a diesel engine of Daimler AG , which was presented in October 2008 in the model Mercedes-Benz C 250 CDI BlueEFFICIENCY . . The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. After purchase, it is worth taking care of this area. Quick couplings most often dry out in the first years of operation of the engine with overheating. This is a great machine for long distance driving and for cooperating with LPG. Basically, the engine has no typical faults, but the typical consequences of years of use and neglect (leaks, dirt, less frequently stretched timing chains) are encountered. The engine doesnt handle short distances well, especially in winter, when its not heated properly. 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om646 engine problems