Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. For a better experience, please enable JavaScript in your browser before proceeding. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Sign up now!!! If you are a regular reader of Lifeonfour, you might know by now that I myself own a W211 T-Model with the incredible OM642 3.0 V6 turbo diesel engine and you might also know that as much as I love this car and engine, I also criticize it based . In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. 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. 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. Their strength, however, is simplicity and lack of effort. Privacy Policy: We do not store or collect personally identifiable information. 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. "All you need to know about tuning the Mercedes OM646 engine!". Be sure to keep up with our latest YouTube content and subscribe. 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. These four seals can be re. We use cookies to ensure that we give you the best experience on our website. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. This can lead to erratic engine behaviour. 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 may vary depending on the upgrades you've carried out and the condition of your engine. 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). Rapid delivery as usually in stock. Where is the number. or 200 CDI . Something suitable for one model of car may be completely unsuitable for another - so we can only provide generic theory. It was also installed on the E-class W210, Vito and Sprinter. Euro 4 emission standard compliance (from 2003) on. Here are some of the engine codes for the W204: 1.6-liter M274 I4 engine - M274.910, M274.920. The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. Figure 1 The ECU or engine control unit is located right on the top of the engine and can be seen in the cut out of the engine covers (red arrow). In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. Here, careful verification is important. We have tips on removing carbon build up. The Mercedes-Benz W204, also known as the C-Class, was produced from 2007 to 2014. The OM646 engine is no different. Solved by replacing the chain with a new one. Which helps us keep our guides and tips up to date helping others with their modified car projects. 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 Technical Data. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. 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. Another weak area is the intake system. Despite the fact that the engine from the Mercedes 2.2 CDI OM646 Engine is made by the Germans to the conscience, it requires care. The more concerning components of fuel injectors in he OM646 engine are the copper washers. Check our guide on bad fuel injectors to learn more. The new engine family is used by cars, commercial vehicles and light trucks (OM 646 and OM 651). Alternator pulley failure is accompanied by noise. Few problems should happen as long as they are regularly serviced and maintained. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. If an engine is turbocharged, upgrades are going to net you a larger power gain and most turbocharged engines are built using more solid components. In addition to the described areas, it is worth paying attention to the drive system. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. 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. Germany focuses on power, work culture and economy. Read more about us. Secure dispatch in special transportation case. The repair costs exceed half a billion euros. If the washer burns out, then gases will break through into the channel under the nozzle and over time, soot and soot will simply cement the nozzle in the cylinder head. Weak spots, Issues & problem areas on the OM646. To remove the unit you must first remove the engine covers. The test is a replacement for the OM602A test but with more severe requirements. Ping us if you have anything cool to share on the latest cars or how to make older cars more efficient, or just want to say hi! Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. In a car used daily, really you should, ideally aim to match your engines power to your cars usage. Wiping on the liner leads to knocking, stopping idling. Engines & Engine Parts; Gaskets, Seals & Hardware; Gaskets & Seals; GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L; See Details on Ebay GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. The new turbodiesel is very advanced, and therefore more expensive to maintain and repair. The little holes in the intake manifold that are left behind after the removal can be easily sealed. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. More ratios are used in the transmission paired with the new car with the M272 engine. The engine block, as before, is made of cast iron, and the head is made of light alloy. The elements installed on the block were very emergency. Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. Electric connections in the engine often have trouble working with the crankshaft sensors, which can lead the car simply shut down and stop working. Since a special stand is required. While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. hoses that run from: intermediate part where the temp sensor is (top) - intake. The differential pressure sensor usually falls first. This is not the coolest tolerance, but you should not neglect it. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. So, for the replacement, the whole machine had to be removed! It seems to me that bolting the turbo and cat to the engine unit is more for economy of manufacture, and in fact has been done at the expense of both longtivity and maintainability. The durability of the structure itself is very high. Longer valve durations can alter the torque 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. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Solved by installing a new pulley. Tuning . Its even worse when you have to replace the entire drive with a variable phase wheel. "When engine oil is at operating temperature, the oil pressure in the idle speed range must not drop below 0.3 bar. As befits a Mercedes comfortable. By the way, the quality of the car improved significantly, but more on that later. Specifications and Modifications. 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. The concern here is if they come out without snapping. The engine was offered in five power variants. 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. 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 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. Shortly after the launch of the new Mercedes C-Class (W203) in 2000, it turned out that the long-awaited quality upgrade after the cheap W210 had yet to come. Repair costs around $ 135. Work out your MPG I advise what to choose and what to pay attention to. To improve engine starting, ceramic glow plugs began to be used. Entdecken Sie KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in der groen Auswahl bei eBay. Jump To Article. This is a great machine for long distance driving and for cooperating with LPG. Check crankshaft bearings for alignment. Solving the problem is not complicated and not too expensive. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. At an auto store, the same part can be purchased for $ 40. feature on twinchargers if you want to read more. 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 original cost over $ 80. Removing the injector is a difficult task. Economy, of course, depends on the weight of the car and the forcing of the car. We use cookies to ensure that we give you the best experience on our website. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of 500 per page (250 per image) used without permission, (This covers our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines.). But if the exhaust pipe is too big, ie: over 2.5 inches bore, you will lose a lot of the flow rate and end up lacking power and torque. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. Forza 5 tuning guide. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. 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