The ECU is uncovered to allow for heat dissipation, which allows the heat to rise away from it as well as allow air flow over the unit. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. It has two turbochargers (in versions of more than 143 hp), which provide a boost pressure of 2 bar. The low end idle will be very lumpy and irregular, so something you would notice on a track when you drive in the upper third of the rpm band, but on roads this is a serious issue and we've heard from lots of drivers lamenting their decision to add an extreme competition cam profile to their engine. 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. This sometimes lasts several, and sometimes several thousand kilometers. no cracks or splits or O-rings missing. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. There are also modifications of BlueTEC and BlueEFFICIENCY. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Equipment failure is caused by mileage and wear. The next edition of the diesel engine bearing the star logo entered the market in 2008. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. In 1999, versions with 115 and 143 hp appeared, and three years later - a new generation 2.1 CDI with the designation OM 646 and power of 122 and 150 hp. In 2006, Mercedes-Benz upgraded the OM646 diesel. Modified car insurance
Dirt collects in the collector, and as a result, the cover that controls the length of the channel is damaged. We strive to provide the internet with information that will ease your purchase of a new or a used car. Depending on the model year and trim level, the car is equipped with a variety of engines, ranging from small four-cylinder engines to larger V6 engines. These four seals can be re. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. Euro 4 emission standard compliance (from 2003) on. Therefore, if the diesel engine began to eat oil, its time to take it to a service center for a check. The engine was offered in five power variants. the engine problems and damage described above. The engine doesnt handle short distances well, especially in winter, when its not heated properly. 321,869 km) or more with the OEM turbocharger. 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. 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. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. Forza 5 tuning guide. Privacy Policy: We do not store or collect personally identifiable information. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. 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. 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. 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. It features a reduced compression ratio of 17.5:1, a new turbocharger,
. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. 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. Experienced mechanics recommend replacing the fitting. In 2010, engineers upgraded it to Euro 6. Mapping - remapping provides the most advantage in terms of cost savings, aftermarket ECUs, and piggyback ECUs are all alternatives. To keep us running PLEASE Donate here. Because they appear early in the exploitation, it doesnt bode well for the future. A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. Jan 27, 2017. The chain itself is not very expensive, so no worries here! 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. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. (All car owners of all ages and from all countries are welcome). OM642 oil pressure check. This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. Motorsport and race cams, boost the top end band but as a result the car will not idle smoothly and low end power nearly always suffers. The engine was equipped with a Common Rail 2 fuel system. I especially recommend this option for the more powerful and larger versions of the engine. Why word? Mercedes E-Class W211 - OM646.951 OM646.961
Every engine has Common Rail injection, and Mercedes isnt the best-performing company. This is not the coolest tolerance, but you should not neglect it. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. If you continue to use this site we will assume that you are happy with it. 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,
Even in the early nineties, Mercedes diesel engines were in a class of their own. Higher pistons and shorter connecting rods were used. The pulley alternator in + can often fail. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. 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. 2 and 3 connecting rods are deformed, liners wear out. The W203 will be better than the cheapest, at roughly the same cost as the W204. This oil is leaking in the tensioner area. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. Chip tuning
Limp Mode? Definitely get the auto box, subject to Mr E's Valeo / glycol warning. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair.
Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. As long as everything works perfectly in the cooling and lubrication 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. Well, the drive is located on the side of the gearbox. Bosch fuel system 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. Save my name, email, and website in this browser for the next time I comment. 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. This engine continued the modular tradition. They are reliable and fuel efficient but not particularly powerful. So please pay attention to this article. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . OM646, M271). Removing the injector is a difficult task. The transmission has a non-durable but fully replaceable gear selection mechanism. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. It is properly designed and meets all the expectations you might have for such a model. was updated under the EVO name and replaced the
Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence. The differential pressure sensor usually falls first. Tips for N54 Tuning
Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. In summary, all gasoline engines can be recommended. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . 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. Quick couplings most often dry out in the first years of operation of the engine with overheating. 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