This problem cannot be determined in garage conditions. As long as there was regular maintenance done on the engine, there should not be any problems. This oil is leaking in the tensioner area. More than 300,000 vehicles appear on the website. Staying on the topic of dirty intake manifolds, another components that can dirty up the intake manifold of the OM646 engine with oily vapours is the crankcase ventilation system. Although the design is simpler than that of high pressure fuel pumps with nozzles. Mazda SKYACTIV 2.0L and 2.5L engines. Good proof is a machine called the 2.1 CDI OM651. The engine was offered in five power variants. The updated OM646 EVO has 90 parts replaced. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. Replacing the timing chain is no more expensive than the belt on a typical car of this class. Some sources report that the shortage affected about 300 cars. Shopping for a Mercedes-Benz? The repair costs exceed half a billion euros. 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. Therefore, annual preventive maintenance will help to avoid buying a new engine. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. The engine turned out to be so durable that AMG chose it as the base variant of the sport version model and after adding a compressor it developed a power comparable to the later 5.4l. Mercedes dealers have the . Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. New replacement costs at least $ 405. . Most tuners we speak with say to be generous with your flow rate on the injectors. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. 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). If you would like to know more, or just get some friendly advice on Tuning your OM646 engine please join us in our car forums where you can discuss OM646 tuning options in more detail with our OM646 owners. filed under Mercedes. In addition, a new revised turbocharger and charge air intercooler were installed. Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. Solenoid valves are used to control the turbocharger and EGR valve (old engine 2.1). Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. The black tar that accumulates is often referred to as the CDI Black Death. AMG is the definition of an amazing engine. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! engines. Plenty of these engines made it to 200,000 miles (ca. In comparison, the new Delphi injector costs $ 450. 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 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. Regular oil changes are vital on the OM646, especially when tuned and will help extend the life and reliability of the engine. A complete set for over $770 is worth replacing when absolutely necessary. Sports exhausts equal out the flow of gases through the engine. Tips for N55 Tuning, Tuning Diesels 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 compression ratio is reduced to 16.2: 1. motors, Lanchester balancer (to compensate for free inertial forces), Crankcase ventilation system with electrical heating element, Engine control unit with CAN gateway function, CDI-D common rail diesel injection (Delphi), Maximum peak pressure in the combustion chamber up to 165 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. 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 displacement of the new version of the engine is 2143 cm3. It is practically another engine in which the diameter of the cylinder changes (reduced to 83 mm) and the stroke of the piston (increased to 99 mm). . Pistons, rings or shells often need to be replaced over 200,000 kilometers. The Fora platform includes forum software by XenForo. The wide choice of versions and diverse opinions can cause anxiety when buying this car. 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 compression ratio of the diesel engine was lowered from 18.0 to 17.5. The To remove the unit you must first remove the engine covers. Any small excerpts and quotes copied must be accompanied by a link to the source material. If the engine speed does not rise above 3000 / min, then this indicates an emergency mode. Induction Kits The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . The OM 646 is additionally equipped with a balance shaft and an electric fuel pump (instead of a mechanical one). document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. For comparison, the injection pressure OM 611 - 1350 bar. Which helps us keep our guides and tips up to date helping others with their modified car projects. Free shipping on many items! This one can also stretch pretty fast. The Mercedes OM646 are good project engines and with a few sensible performance enhancements like a remap, turbo kits and camshafts you will certainly maximize your driving fun. Regulators regenerate most often. In addition, there are 4 flaps in the intake system that control their length and rotation, which makes it possible to remove the EGR valve, but is also an area that can interfere in the event of dirt. It most often crashes in the vehicle. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. Our advertising partners also use cookies. The first generation Bosch CP1 fuel pump is also very reliable. So, after the Fiats 1.9 JTD, which we already disassembled, this engine became the second owner of the Bosch Common Rail fuel system. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. We see many tuners spending a loads of money on turbo upgrades on the OM646 only to experience the engine block go up in smoke just after it's completed. Here, careful verification is important. He made his debut on the C-class W202 in 1998. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. Combi with so round that it has a bit bigger 470 l for roller shutter. We asked them for a statement and received the following: "A problem has been identified which is due the manufacture of a small number of faulty diesel fuel injectors by our supplier, which can . Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. Hi there, I'm Mladen and I'm an auto enthusiast. Electronics has become a very troublesome area. 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. The pulley alternator in + can often fail. Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. 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. Removing the injector is a difficult task. 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. The third weak point is the variable geometry turbo regulator. W204 Engine Codes. In 2010, engineers upgraded it to Euro 6. The 6-speed manual gearbox is not a very successful design. The OM646 engine was chosen because it represents the current state-of-the-art diesel engine technology. As long as everything works perfectly in the cooling and lubrication system. 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. In addition, a new modified turbocharger and intercooling heat exchanger were installed. Read more about us. Mercedes E-Class W211 - OM646.951 OM646.961 According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! Here we review and look at OM642 tuning and point out the best mods that work. Loves high-quality and clean fuel. 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. Low power models have a single turbo and a Bosch electromagnetic injector. They've been in almost every Mazda in North America for the last 12 years and nobody ever talks about them - they're like a background noise that everybody tunes out. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. OM601 engine 2.2. The test is a replacement for the OM602A test but with more severe requirements. Also it looks like access for the OM654 is much worse than the OM651. gas recirculation, and particulate filters.. . Lets start with fuel injectors. Stretching the timing chain is a favorite problem of the 2.2 CDI OM646 Engine . The car fails the most with its anti-corrosion protection and faults. We use cookies to ensure that we give you the best experience on our website. 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. Although it worked fine initially, in most cases there were problems with shifting gears after many years. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. 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, Particularly the chain tensioner. #10. The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. Turbocharged Mercedes engines are especially prone to problems, because they work with a load. (OM611) Engine Specs, Problems, Reliability. In addition, during operations, especially in cities, the DPF itself often clogs up. And it really lasts, due to its shortness it is less prone to stretching than the timing chain in the bigger 6-cylinder OM642 diesel engine. Other variants are ok. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. keep up with our latest YouTube content and subscribe. 2003 is a time for change. More and more users of cars equipped with 2.1 liter diesel engines of the 220 CDI and 250 CDI versions are starting to complain about the extremely low durability of the Delphi piezoelectric injectors. They are reliable and fuel efficient but not particularly powerful. The solution is to replace the crankshaft, liners. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. 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