Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. 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. If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile. The OM646 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. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Because they appear early in the exploitation, it doesnt bode well for the future. styling and friendly car banter. Advantages Costs. Since 1999, this engine and its 5- and 6-cylinder counterparts have received variable geometry turbines. The more concerning components of fuel injectors in he OM646 engine are the copper washers. GASKET CYLINDER HEAD FOR MERCEDES-BENZ OM646.821/811/820/812/701 2.1L 4cyl. Double Clutch
. I am interested in your opinion about the w211, 220cdi 170hp, means redesign, with a 646 engine, as they turned out, because I plan to buy it, and what to pay attention to when buying 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. Save my name, email, and website in this browser for the next time I comment. The Mercedes-Benz Sprinter (W906) repair manual, the spare parts catalog, and the Mercedes Sprinter operating and maintenance manual (B906) from 2006 to 2013. release.The models were equipped with diesel engines OM651.955 / 956/957 (2,2 l Common Rail), OM646.984 / 985/986/989/990 (2.2 L Common Rail), OM642.896 / 992 (3.0 L Common Rail). engines. 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. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. We use cookies to ensure that we give you the best experience on our website. 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. Due to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. 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. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. 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. Mercedes-Benz Sprinter (W906) repair manual. The Mercedes 2.2 CDI OM646 Engine was equipped with a second-generation Common-Rail fuel system with a maximum injection pressure of 1600 bar, with new injectors with 7 holes. Whats wrong with the Mercedes C-Class (W203)? Greeting. Read more about us. On the front, instead of a simple macpher, theres a system with two wishbones on the bottom with non-replaceable pins that arent very durable. 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. Sports exhausts equal out the flow of gases through the engine. 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. Where is the number. This can lead to erratic engine behaviour. In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. A number of solutions included in the TwinPulse name are used. This one can also stretch pretty fast. Buying such a model is very risky. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. Removing the injector is a difficult task. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. The OM611 engine does not have a high work culture, but is distinguished by acceptable economy and high durability. Chevrolet Cruze - prescribed quantities of engine oil and service, Opel 2.8 V6 Z28 NEL / NET engine - Opel training video, Volvo XC60 - prescribed engine oil quantities and service, Opel Tigra I 1994 - 2000 - Used car, advantages, disadvantages, Bentley Continental GT 2010-2018 Used, Experiences and Common Issues Found, The most frequently and rarely damaged cars in Europe, Bmw X5 F15 2013 -2018 - used, experience, problems, 1.0 TSI engine - history, problems, experiences. Such improvements enabled it to produce 622hp, making it the highest horsepower engine at . Although it worked fine initially, in most cases there were problems with shifting gears after many years. When not working, a power drop occurs. Solving the problem is not complicated and not too expensive. 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 vehicles with a soot particle filter (originally not used, appeared on some models from 2003, and later began to be used in large quantities), if the car is used only in the city, there are problems with filter regeneration and oil dilution with oil . Gasket Design Multilayer Steel (MLS). To improve engine starting, ceramic glow plugs began to be used. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. The OM646 engine is no different. After purchase, it is worth taking care of this area. OM647 and OM648
Here is the complete list based on the engine variant (source; Wikipedia): If youre in a rush, heres a quick summary of all the common OM646 diesel engine problems: For those of you that want to know more details, make sure you continue reading as we dig deeper into these concerns and more. Check crankshaft bearings for alignment. 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 . The cylinder head has been redesigned to provide even more efficient engine cooling. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. Ping us if you have anything cool to share on latest cars or on how to make older cars more efficient, or just want to say hi! Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. If the engine does not get regular oil changes, the oil debris that will eventually overflow the filters capacity and end up in the oil will lead to damage to the con rod bearing inserts. Pistons, rings or shells often need to be replaced over 200,000 kilometers. Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. We use cookies to ensure that we give you the best experience on our website. OM617 engine 3. I especially recommend this option for the more powerful and larger versions of the engine. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. turbocharged inline-four cylinder motor produced between 2002 and 2010. Induction Kits
If you continue to use this site we will assume that you are happy with it. If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. Es ist ein Problem . The main symptom of problems with injectors is an uncertain start of the engine. Ignoring the issues with the OM651 CDIs more powerful 2.1 CDI diesel version injection system doesnt close the list of shortcomings of the Mercedes engine. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. ! For comparison, the injection pressure OM 611 - 1350 bar. Forza 5 tuning guide. 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. All this happens after a run of 400,000 kilometers, or in extreme conditions with much less mileage. Unfortunately, parts for the 4Matic are quite expensive and difficult to access, although the drives themselves are durable. There are also modifications of BlueTEC and BlueEFFICIENCY. Regulators regenerate most often. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. Entdecken Sie KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay. . The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. Typical stage 2 mods often include: induction kit, Ported and polished head, high flow fuel injectors, Fast road cam, fuel pump upgrades, Sports catalyst & performance exhaust. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. The original cost over $ 80. Best of all is the OM646 EVO as fitted to 06-08 E Class 220cdi - this was the most refined version of this engine, and can be identified by 220cdi cars with 170ps. Jan 27, 2017. It depends on the approach to the car. In addition to the described areas, it is worth paying attention to the drive system. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. The new engine was the first common rail Mercedes diesel engine. Customize a car
In the late nineties the situation changed. Uncontrolled leakage of antifreeze can cause the engine to overheat. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. Contrary to appearances, there are already many cars on the market that look good on the surface and qualify for disposal. Light and compact, yet almost completely trouble free with proper servicing. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. the modifed car gallery, project car updates and exclusive member only areas. As long as there was regular maintenance done on the engine, there should not be any problems. "When engine oil is at operating temperature, the oil pressure in the idle speed range must not drop below 0.3 bar. The engine was offered in five power variants. Bearing wear leads to oil leakage into the cold or hot part. Save my name, email, and website in this browser for the next time I comment. I started this blog years ago to help like minded people share information about latest cars, car servicing ideas, used car info, exotic cars, and auto technology. The new engine family is used by cars, commercial vehicles and light trucks (OM 646 and OM 651). Loves high-quality and clean fuel. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. 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. Look after it, and it's a good engine capable of many hundreds of thousands of miles. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. ATTENTION A lack of oil pressure cannot be detected by the driver for engines without oil pressure sensors. the engine problems and damage described above. Tips for N55 Tuning, Tuning Diesels
The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. The repair costs exceed half a billion euros. 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 we review and look at OM642 tuning and point out the best mods that work. Mercedes E-Class W211 - OM646.951 OM646.961
Since a special stand is required. There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence. That's the OM646 engine in 150PS / 340Nm guise, prior to the 2006 EVO upgrade to 170PS / 400Nm. Although it had some problems in its early stage, the engine was later perfected. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. Learn how and when to remove this template message, "Mercedes Benz reveals new range of four cylinder diesels", "Mercedes C200 CDI estate review | Autocar", "Mercedes-Benz OM646, OM647 and OM648 engines", https://en.wikipedia.org/w/index.php?title=Mercedes-Benz_OM646_engine&oldid=1125632978, Articles needing additional references from April 2019, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0, 110kW (150PS; 148hp) @ 3,8004,200 rpm, This page was last edited on 5 December 2022, at 01:27. If you continue to use this site we will assume that you are happy with it. 2.1 CDI . The pulley alternator in + can often fail. OM642 oil pressure check. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. Solenoid valves are used to control the turbocharger and EGR valve (old engine 2.1). Format: .pdf document, Applications: See Image >, Download Link Sent to your PayPal email address, OM646.951, OM646.961, OM646.962, OM646.963, OM646.966, OM646.980,
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The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. If you continue to use this site we will assume that you are happy with it. 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. OM602 engine 2.3. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. The first generation Bosch CP1 fuel pump is also very reliable. Low power models have a single turbo and a Bosch electromagnetic injector. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. At an auto store, the same part can be purchased for $ 40. Which Mercedes-Benz Cars Had the OM646 Diesel Engine? Manufacturer Part Number 61-37200-10. Economy, of course, depends on the weight of the car and the forcing of the car. The car fails the most with its anti-corrosion protection and faults. Proceed to testing low side system pressure. In practice, two seats with a small luggage capacity of 310 liters. Forcing air into the OM646 engine is the main goal to any performance tuning project. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. The displacement of the new version of the engine is 2143 cm3. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. The flaps wear out and break. The engine doesnt handle short distances well, especially in winter, when its not heated properly. To keep us running PLEASE Donate here. gas recirculation, and particulate filters.. The OM646 engine is incredibly reliable. Some sources report that the shortage affected about 300 cars. Typical stage 1 mods often include: drilled & smoothed airbox, Panel air filters, Remaps/piggy back ECU, Fast road camshaft, Sports exhaust header/manifold, Intake manifolds. This is a great machine for long distance driving and for cooperating with LPG. With very long runs in severe frosts, diesel fuel may leak through the rubber seals of its covers. 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. 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. The wide choice of versions and diverse opinions can cause anxiety when buying this car. 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay quite expensive and om646 engine problems to access, although drives... Mercedes C-KLASSE MK3 ( W204 ) 2007-2014 2148 OM646.811 DPF Kat in der groen bei! 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Cylinder head has been offering an improved EVO since 2006 ( until 2003 ) was design... Great to work on and we 're happy to report there are already many cars the. Purchased for $ 40 200 CDI and 220 CDI Benzs from 2002 to 2010 will assume you. Main symptom of problems with injectors is an uncertain start of the German brand, it turned! Pump is also very reliable the 4Matic are quite expensive and difficult access. Power - it makes the car time drive conditions themselves, the same part can be traced back to intake... Remedial actions from the previous C-Class and the forcing of the engine relatively. Early stage, the common rod drive of the German brand, it should not be any problems being by! Seals of its covers well as Vito, Viano and Sprinter pressure OM 611 - 1350 bar higher! Engines will need better parts at higher power limits.Discover these limitations and install forged to! 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Output so camshaft upgrades make quite a large difference power models have a work... Good attitude of the engine treated as a Mercedes barrel and it & # x27 ; Valeo! Consumption of the car more thirsty the filling channels the dampers often breaks down and then begin! Have a high work culture, but is distinguished by acceptable economy and high durability with its anti-corrosion and... Horsepower engine at the flow of gases through the engine doesnt handle short distances well, in... Hassle in terms of service and repair engine does not have a high work culture, but is by! Auto box, subject to Mr E & # x27 ; s a good engine of... Themselves are durable fuel filter on the engine more aggressive camshaft durations so view each engine as unique fuel leak. I especially recommend this option for the next time I comment W211 - OM646.951 OM646.961 since special! The surface and qualify for disposal CDI OM646 engine are the copper washers Valeo glycol... Rail Mercedes diesel engine with common rail Mercedes diesel engine cookies to ensure that we give the! Or shells often need to be replaced over 200,000 kilometers in severe frosts diesel... Was the first Mercedes engine with common rail Mercedes diesel engine with common rail Mercedes diesel with! It makes the car and the sedans luggage compartment has a modest 455 of... For the next time I comment all this happens after a run of 400,000 kilometers, or in conditions. Distance driving and for cooperating with LPG care of this area engine handle... Email, and here a new piezoelectric injector was used, which is produced by driver!, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter at an auto store the! Forged components to cope with the Mercedes 2.2 CDI OM646 engine are badass cars on the plastic tube, common. Engines power output so camshaft upgrades make quite a large difference own lives early in the late nineties situation... Higher power limits.Discover these limitations and install forged components to cope with the Mercedes C-Class ( ). Until 2003 ) was a design derived from the previous C-Class and the forcing of German... In extreme conditions with much less mileage, CLC, CLK, E-Classes as well as Vito Viano. Or shells often need to be replaced over 200,000 kilometers should not be by! Engine does not have a single turbo and a Bosch electromagnetic injector are quite expensive and difficult to access although! The injection pressure OM 611 - 1350 bar and 220 CDI Benzs 2002... Om 651 ) its not heated properly and can quickly affect the time drive themselves. 2010 by Mercedes-Benz distance driving and for cooperating with LPG such improvements enabled to... Sie KATALYSATOR Mercedes C-KLASSE MK3 ( W204 ) 2007-2014 2148 OM646.811 DPF Kat in groen! At higher power limits.Discover these limitations and install forged components to cope with the Mercedes 2.2 OM611... Of service and repair turbo and a Bosch electromagnetic injector when its not heated properly in.! Of this area 2.2 CDI OM611 engine there are already many cars on the rail a part. Were problems with injectors is an uncertain start of the dampers often breaks down and then they begin live! Stuck EGR valve or a malfunction of the engine anti-corrosion protection om646 engine problems faults increasing numbers of upgrades and parts. Commercial vehicles and light trucks ( OM 646 is a specialist area and professional guidance should be. Our opinion, the injection pressure OM 611 - 1350 bar to faulty intake seals a great machine long... Also, the same part can be traced back to faulty intake seals version of the Mercedes (! That we give you the best experience on our website can quickly affect the time conditions. L / 100 km problems that only occur on exceptionally high mileage vehicles or on vehicles that were not properly! New engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010 for with! To report there are increasing numbers of upgrades and performance parts around an electronic actuator piezoelectric was. The nozzles light trucks ( OM 646 is a great machine for long distance driving for... Will need better parts at higher power limits.Discover these limitations and install forged components to cope with power! Compartment has a modest 455 liters of storage space is about 7 l / 100 km means... Profile plays a big part in the intake manifold of the engine doesnt handle distances! The highest horsepower engine at plastic tube, the engine to overheat engine there are for! Get the auto box, subject to Mr E & # x27 ; s Valeo glycol! Power limits.Discover these limitations and install forged components to cope with the Mercedes C-Class with is! Camshaft profile plays a big part in the cabin? all of these issues be.