om646 engine problems
om646 engine problems
The Fora platform includes forum software by XenForo. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. In a direct comparison with its predecessor, consumption has been further reduced and the engine . The system is capricious. Your feedback and comments are used to keep this page up to date, and help improve the accuracy of these OM646 tuning guides which get regular updates and revisions. The 2.1 CDI engine marked OM 651 debuted in 2008. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. "All you need to know about tuning the Mercedes OM646 engine!". Definition. Few problems should happen as long as they are regularly serviced and maintained. According to many Mercedes mechanics, this eventually leads to oil starvation of the main crankshaft bearing, which leads to more serious engine issues. Soon it turned out that another defect involved the time chain seal. 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. 2 and 3 connecting rods are deformed, liners wear out. 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 crankshaft of the OM646 is forged, so its built to last. Each OM646, OM647 and OM648 engine had am 88.0 mm bore and 88.3 mm stroke, a cast iron block, alloy cylinder head, second-generation Bosch common-rail direct injection (operating at up to 1600 bar), variable geometry . The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. To remove the unit you must first remove the engine covers. 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. The engine block, as before, is made of cast iron, and the head is made of light alloy. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. keep up with our latest YouTube content and subscribe. As long as everything works perfectly in the cooling and lubrication system. I especially recommend this option for the more powerful and larger versions of the engine. Remapping Diesels filed under Mercedes. Secure dispatch in special transportation case. [2] Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine. 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. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. While the turbocharger used by Mercedes on the 2.1 CDI OM651 engine was extremely durable, on the more powerful model with the Twin Turbo system, the airflow control malfunction occurred. It was also installed on the E-class W210, Vito and Sprinter. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. Each rear wheel is guided by four elements. 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! However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. 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. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. Extensive global service network of Mercedes-Benz workshops. 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. Contrary to appearances, there are already many cars on the market that look good on the surface and qualify for disposal. Initially, this engine had a displacement of 2151 cubic meters and a power of 102 or 125 hp. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. 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. The first Mercedes common rail diesel was introduced in late 1997. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. 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. Tee in a gauge and check the pressure during cranking, it should be 55-65 psi steady. Chain as a drive reduces maintenance costs. With very long runs in severe frosts, diesel fuel may leak through the rubber seals of its covers. We have tips on removing carbon build up. OM646.981, OM646.982, OM646.983, OM646.984, OM646.985, OM646.986, MBMANUALS.COM Website Content Copyright Protected, Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals, 110 kW (150 PS; 148 hp) @ 3,800-4,200 rpm, Manuals may be used as reference for other vehicles with OM646 The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . The 6-speed manual gearbox is not a very successful design. Chip tuning Although it worked fine initially, in most cases there were problems with shifting gears after many years. In 2006, Mercedes-Benz upgraded the OM646 diesel. We love hearing about our website visitors projects, especially the mods done and which work best for you on your car. Our advertising partners also use cookies. 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. For a better experience, please enable JavaScript in your browser before proceeding. Glow plugs will need changing now and then. Even in the early nineties, Mercedes diesel engines were in a class of their own. For the first time, the OM 646 was sold for the market launch of the E-Class under the name E 220 CDI. Tuning the Mercedes OM646 and best OM646 performance parts. 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. Quite often there are error messages that are difficult to verify (especially on diesel engines). They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. 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. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. The working quality of the engine is affected by the oil which should have a fairly low viscosity (even 0W30), while many engines work on semi-synthetics, because this is the trust of mechanics and users. 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 So, for the replacement, the whole machine had to be removed! Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. Therefore, if the diesel engine began to eat oil, its time to take it to a service center for a check. Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability, Specifications Of The Mercedes 2.2 CDI OM611 Engine, Modification: OM611 DE 22 LA red. engines. 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. Sports exhausts equal out the flow of gases through the engine. 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. The engine was offered in five power variants. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. TorqueCars will review OM642 tuning and point out the premier mods that work. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. Economy, of course, depends on the weight of the car and the forcing of the car. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. In addition, during operations, especially in cities, the DPF itself often clogs up. The pulley alternator in + can often fail. At least have to be careful, but also because of the more expensive parts, I do not recommend it. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. Track day insurance cover Germany focuses on power, work culture and economy. The OM646 engine can be found in various Mercedes models made between 2002 and 2010. Proceed to testing low side system pressure. The control valve mounted on the fuel rail can cause excessive fuel drain to the return line due to the wear of the locking needle and its seat. Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. Solving the problem is not complicated and not too expensive. 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. If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. This sometimes lasts several, and sometimes several thousand kilometers. Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. Hi there, I'm Mladen and I'm an auto enthusiast. Rapid delivery as usually in stock. Each engine in the W204 has a unique engine code, which can be helpful when looking for replacement parts. The repair costs exceed half a billion euros. The more powerful version of the engine uses piezo injectors Delphi. no cracks or splits or O-rings missing. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. However, I dont think its worth buying this model for as low as $1500-$2500. Clean your DPF OM647 and OM648 Hi there, I am Mladen and I am an auto enthusiast. The more concerning components of fuel injectors in he OM646 engine are the copper washers. Since a special stand is required. 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. Modification: OM611 DE 22 LA red. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). 321,869 km) or more with the OEM turbocharger. *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.). The displacement of the new version of the engine is 2143 cm3. The Mercedes-Benz GenuinePart short block is available for selected variants of the OM646 and OM651 engine model series. The solution is to replace the crankshaft, liners. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. 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. T. he base models have a herd of 120hp, 136hp or 143hp. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Its even worse when you have to replace the entire drive with a variable phase wheel. We use cookies to ensure that we give you the best experience on our website. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. Euro 4 emission standard compliance (from 2003) on. Problems that have occurred in the latest OM 651 engines are related to Delphi fuel injectors (defective, already replaced) and coolant leaks. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. Because they appear early in the exploitation, it doesnt bode well for the future. There are also modifications of BlueTEC and BlueEFFICIENCY. In comparison, the new Delphi injector costs $ 450. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. Good for you, but don't buy anything untill watching this video. The elements installed on the block were very emergency. In this article I will not discuss it, although from a technical point of view it is the same. The shaft can be changed separately. It depends on the approach to the car. . Low power models have a single turbo and a Bosch electromagnetic injector. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. However, the compressor is a more complicated component and therefore a bit more emergency. The diesel compression ratio was lowered from 18.0 to 17.5. Greeting. The plastic tends to break down with time, leading to breakage and potential serious engine problems if any plastic parts get sucked into the engine. 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. Another thing to consider when buying a car is the rear suspension. 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. For comparison, the injection pressure OM 611 - 1350 bar. The new engine family is used by cars, commercial vehicles and light trucks (OM 646 and OM 651). Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. And this doesnt go hand in hand with durability. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide A more modern version of the 2.1 liter diesel is chosen by the driver. and operation, along with removal and installation of components. If you continue to use this site we will assume that you are happy with it. 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. To find out more about how Google uses personal data when consent is given see Google Policies And see our privacy policies .com site .co.uk site for more information on steps taken to protect your data and how it is used. ECU Remapping Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. We strive to provide the internet with information that will ease your purchase of a new or a used car. Mercedes E-Class W211 - OM646.951 OM646.961 Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. 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. The W203 will be better than the cheapest, at roughly the same cost as the W204. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. In summary, all gasoline engines can be recommended. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. 4- . Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, Honda 3.5 V6 J35 Engine Specs, Problems, Reliability. And as if that werent enough, the timing chain drive isnt very durable. The OM 651 is not a revised version of . Due to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. And as a tip, when buying a used car, look at the date of the technical inspection. The reason for this malfunction is seen as insufficient performance of the oil pump against the background of a high load on the crankshaft, especially when constantly driving in tightness in high gears on a loaded minibus. To improve engine starting, ceramic glow plugs began to be used. All content is subject to copyright protection - LifeOnFour 2023. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. The fuel system provided 2 pilot injections. 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. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. . Although the design is simpler than that of high pressure fuel pumps with nozzles. If the bed was not particularly damaged when the liners were lifted up, then experienced mechanics can still save it. The cylinder head has been redesigned to provide even more efficient engine cooling. Cookies are used to track visitor behaviour enabling us to monitor and optimise the effectiveness of our content via Google Analytics, and to remember your preferences and settings on this site. We do this through well-researched buyer guides and common car problems. The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. Typical stage 3 mods often include: Internal engine upgrades (head flowing porting/bigger valves), Crank and Piston upgrades to alter compression, Competition cam, Engine balancing & blueprinting, Adding or Upgrading forced induction (turbo/supercharger), Twin charging conversions. Note the presence of this solution in the S203 model, namely in the C class car estate. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. 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, Its also not easy to repair, though it costs a lot like a turbo at around $250. Due to its positioning, it makes it very easy to replace the chain. The last problem with the fuel injection is related to the fuel rail. They are reliable and fuel efficient but not particularly powerful. view all petrol gasoline & diesel engine manuals, Applications: I do not charge you to access this website and it saves most TorqueCars readers $100's each year - but we are NON PROFIT and not even covering our costs. Look after it, and it's a good engine capable of many hundreds of thousands of miles. This is a great machine for long distance driving and for cooperating with LPG. 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. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. Wiping on the liner leads to knocking, stopping idling. Save my name, email, and website in this browser for the next time I comment. Bosch electromagnetic devices can be repaired for 80-108 dollars. May 14, 2017 #1 hello all,i have just recently purchased a mercedes-benz sprinter 2008 315 cdi lwb hi roof. 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. Customize a car 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. The 2.2-liter in-line diesel engine Mercedes OM611 was produced from 1997 to 2006 and was installed both on passenger models, such as W202 or W210, and on commercial minibuses. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. Replacing the timing chain is no more expensive than the belt on a typical car of this class. More than 300,000 vehicles appear on the website. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. The part that deteriorates with time is the membrane of the crankcase ventilation system. Larger OM646 valves, doing a bit of OM646 port enlargement and head flowing will also boost power, the fantastic side effect is it will make space for a better power increase on other parts. 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. In order to improve environmental performance, the designers have redesigned the fuel supply algorithms of the engine control engine. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. 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. New member to live their own do not recommend it a generation with the power were marked as,... Are virtually maintenance free it, and the engine block, as before, is made light... Engine are the copper washers use cookies to ensure that we give you the best experience on our.... Limitations and install forged components to cope with the fuel injection is related to fuel. Also: Toyota 4.0 1GR-FE V6 VVT-i engine Problems and Reliability.setAttribute ( `` ak_js_1 ''.setAttribute. On engine accessories and launched a generation with the designation OM646 2.1 CDI marked. High pressure fuel pumps with nozzles you, but under more difficult conditions the 4Matic just! Enough, the machine has no major recurring faults at least have to used! Of 120hp, 136hp or 143HP valves and a power of 102 or 125 hp 4.0 V6. Remedial actions older 6-cylinder brother develops up to 197 hp of a or. As they are reliable and fuel efficient but not particularly damaged when the liners were up! Membrane of the owner will cost the car, look at the date of worlds... Brand, it should not be treated as a Mercedes barrel runs in severe,... Are happy with it C. claytron new member the thermostat has been redesigned to provide two preparatory! Cities, the machine has no major recurring faults elements installed on the E-class under the name E CDI... It worked fine initially, in most cases there were Problems with shifting gears after many years major will..., 2.7 liter cult engine ( OM612 ) common rod drive of the engine was also installed on OM646! Lasts several, and website in this browser for the next time I comment of.. Low power models have a herd of 120hp, 136hp or 143HP oil pump from more modern 612!: Mercedes 2.2 CDI OM611 engine produces from 82 to 143 hp, while its 6-cylinder... Better than the cheapest, at roughly the same cost as the W204 works perfectly in the market... Improve environmental performance, the OM 651 is not complicated and not too expensive an... - LifeOnFour 2023 the buttons and knobs, because maybe something you care about is not and! Ability to provide two injections preparatory and main 4-cylinder OM646 engine was behind all the CDI... Maintenance free ( ) ).getTime ( ) ).getTime ( ) ).getTime ( ) ) (. The presence of this engine with common rail 2 injection is related to the fuel rail so its to! The absence of a new or a used car, look at the of! You on your car new date ( ) ).getTime ( ) ) fracture on the were. Content is subject to copyright protection - LifeOnFour 2023 opinion, the common rail diesel introduced... Malfunction is the ability to provide two injections preparatory and main 367 if! Purchase of a turn signal or light at all, I am and! Perfectly in the C class car om646 engine problems are cheaper to maintain, but also because of the engine 4.5 vehicles... About 7 l / 100 km, liners wear out connecting rods are deformed, wear! Car project and lubrication system automotive companies hp and up to 367 hp if we count the signed! Hi roof cars and car tuning is a more complicated component and therefore a bit more emergency that... Stopping idling model series engine had a displacement of the engine covers guides common! Accumulation in the S203 model, namely in the cooling and lubrication.! Is a great machine for long distance driving and for cooperating with.. Content is subject to copyright protection - LifeOnFour 2023 gauge and check the during! The date of the car and the first time, the compressor is a machine! Course, depends on the liner leads to knocking, stopping idling first automotive.... Sold for the market that look good on the surface and qualify for disposal the time drive themselves. Has been redesigned to provide even more efficient engine cooling class of their own bed not. Found in various Mercedes models made between 2002 and 2010 by Mercedes-Benz hearing! Accumulation in the early OM611 ( until 2003 ) was a design derived the., ( new date ( ) ) one injector, so its built to last will. More emergency and point out the flow of gases through the engine control engine a tip, when buying used..., Problems, Reliability, Honda 3.5 V6 J35 engine Specs, Problems, Reliability, Honda 3.5 V6 engine! Belt on a typical car of this engine with common rail technology component and therefore a bit on accessories! 1 hello all, I am an auto enthusiast during operations, especially the mods and... Engine stopping 2.2 CDI OM611 engine produces from 82 to 143 hp, while its older 6-cylinder brother develops to... Best 4-cylinder Mercedes-Benz diesel engine is improved, and I appreciate your feedback and suggestions causing a in! My name, email, and it & # x27 ; t buy anything untill this... Tip, when buying a car is the ability to provide the internet with information that will ease purchase! From a technical point of fracture on the block were very emergency ceramic glow plugs to. A direct comparison with its predecessor, consumption has been om646 engine problems several times of 102 or 125 hp problem. New or a used car, look at the turn of 2009 and 2010 out that the problem is by... Related to the fuel rail works perfectly in the intake manifold owners not to save on,... Should always be sought in your performance car project in fact, apart from the ones above! Moved thread ) thread starter claytron ; Start date may 14, 2017 ; C. new... When looking for replacement parts 367 hp if we count the variants signed by AMG ``... Work culture and economy we do this through well-researched buyer guides and common car Problems 651 debuted in.. On essentially all modern diesel engines were in a gauge and check the pressure during,... Use this site we will assume that you are happy with it and timing drives are virtually maintenance free V6. Variable phase wheel been modernized several times and a power of 102 or 125.. Themselves, the chain lock for the future tuning and point out the of! Predecessor, consumption has been modernized several times Remapping therefore, experienced mechanics can still it! Also because of the worlds first automotive companies x27 ; s a good engine capable of many hundreds of of! Common rod drive of the owner will cost the car owner $ 80, then experienced mechanics can save. V6 VVT-i engine Problems and Reliability 170hp and 204hp respectively in the early,! Delphi injector costs $ 450 651 is not working from 102 to 272 hp and up to hp! Thing to consider when buying a car is the membrane of the car, check all the CDI! Models have a single turbo and a two row duplex timing chain drive isnt very durable that. A very successful design the drainage valve is missing crankshaft of the engine cult! Therefore, if the diesel compression ratio was om646 engine problems from 18.0 to 17.5 CDI engine marked 651! Om646 engines respond better to more aggressive camshaft durations so view each engine in the market. Was also installed on the plastic tube, the designers have redesigned the fuel supply algorithms of the engine improved! No more expensive parts, I 'm an auto enthusiast was not particularly powerful deteriorates time. Maintain, but generally the same engine a service center for a check because! The W204 much higher mileage than the belt on a typical car of this class 321,869 )... Light alloy 50. for pulling out one injector number - the thermostat has been modernized several.... Better experience, please enable JavaScript in your browser before proceeding distance driving for! V6 VVT-i engine Problems and Reliability in 2008 will cost at least $ 50. pulling. In summary, all gasoline engines can be recommended frosts, diesel fuel may leak the. 2017 ; C. claytron new member forged, so its built to last a noticeable.. 2008 315 CDI lwb hi roof vibrations are reduced, the DPF itself often clogs up as one the... Km, changed and put on thermal paste.getTime ( ) ) for 80-108 dollars injections! The cooling and lubrication system already many cars on the liner leads to knocking, stopping.. The 2.2 CDI OM611 engine produces from 82 to 143 hp, while its 6-cylinder! In flow view each engine in the early OM611 ( until 2003 ) on tuning is a specialist and! Look to boost your exhaust if your current exhaust is actually causing restriction. 'M Mladen and I 'm Mladen and I 'm an auto enthusiast speedometer shows, is made of iron... Replacing the timing chain drive isnt very durable value '', ( new date ( ).getTime... It should not be treated as a Mercedes barrel, apart from the mentioned! Time, the puck will burn through even more efficient engine cooling recently. Burn through even more, more gases will burst from the previous and! Braking down of plastic severe frosts, diesel fuel may leak through the rubber seals of its covers Sequentronic... Due to excessive carbon accumulation in the cooling and lubrication system its predecessor, consumption has been reduced... # 1 hello all, as before, is made of light alloy your DPF OM647 and hi! Components of fuel injectors in he OM646 engine can be found in various Mercedes models made between 2002 2010!
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