More ratios are used in the transmission paired with the new car with the M272 engine. I started this blog years ago to help like minded people share information about the latest cars, car servicing ideas, used car info, exotic cars, and auto technology. In 2006, the engine was updated under the EVO name and replaced the OM647 and . It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. 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. Entdecke KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! Your Constructive comments on this article, I really want to improve this article with your help and suggestions. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. . The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.. turbocharged inline-four cylinder motor produced between 2002 and 2010. This is not the coolest tolerance, but you should not neglect it. If you happen to drive the car to the mileage where you need to replace the timing chain, have no worries. Save my name, email, and website in this browser for the next time I comment. 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. Good proof is a machine called the 2.1 CDI OM651. 3. Since a special stand is required. was updated under the EVO name and replaced the Every version of this engine, including the most powerful one with 170 horsepower, is considered extremely reliable when maintained properly. We use cookies to ensure that we give you the best experience on our website. Issues by Complectations or Trim Levels 3.1. The system is capricious. 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. 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. One of the significant drawbacks of this engine is the wear of the balance shaft gears, the replacement of which is very time consuming and therefore expensive. On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. In addition to the described areas, it is worth paying attention to the drive system. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. 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. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()), 150 / 4200 (170 / 3000 for turbo version), 340 / 2000 (400 / 2800 for turbo version). Sign up now!!! Weak spots, Issues & problem areas on the OM646. To keep us running PLEASE Donate here. The Fora platform includes forum software by XenForo. Check our guide on bad fuel injectors to learn more. *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.). Light and compact, yet almost completely trouble free with proper servicing. Bosch electromagnetic devices can be repaired for 80-108 dollars. 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. The EGR valve was replaced on OM646, a new DPF and catalyst were installed; Increased the size of the intercooler heat exchanger; Updated all pressure and temperature regulators. Unfortunately, this is far from ideal. Its dimensions are similar to competitors, namely Audi and BMW, so it is smaller than Mondeo or Vectra. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, 2.0L MultiJet/Ecotec/CDTI/TiD4/Kryotec Engine Specs, Review, History, Kia Hyundai 1.4 MPi (G4FA) Gamma Engine Specs, Review, History. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. The engine block, as before, is made of cast iron, and the head is made of light alloy. If you miss this moment, you can get wear on the belt tensioner. How much and is it worth buying a Mercedes C-Class (W203)? If you continue to use this site we will assume that you are happy with it. Wiping on the liner leads to knocking, stopping idling. Solving the problem is not complicated and not too expensive. Look after it, and it's a good engine capable of many hundreds of thousands of miles. Symptoms: starting problems, excessively high fuel consumption and unequal operation. Design [ edit ] 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). ! 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. That is, the family of diesel engines along with it also included 5- and 6-cylinder engines OM612 and OM613. Low Power? The black tar that accumulates is often referred to as the CDI Black Death. Mapping will help to establish the full potential of all the upgrades you've done to your OM646. Also it looks like access for the OM654 is much worse than the OM651. 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. Best Mercedes AMG Engine: 6.2-Liter V8. 271,979 km). Solved by replacing the chain with a new one. Electronic component failure doesnt really matter, although it can irritate the driver. - Valves in the intake manifold. keep up with our latest YouTube content and subscribe. Chassis Cab 4. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. Limp Mode? It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. It also has the same problem with oil leakage as the M111. Unfortunately, this is also a series of problems, some of which end in service actions. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). All engines are equipped with intercoolers. In terms of issues, there were none that would occur frequently. 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. Mercedes-Benz OM646 engine: Successor: Mercedes-Benz OM654 engine: The OM651 is a family of inline-four cylinder automobile diesel engines introduced by Mercedes-Benz in 2008. Design. 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. "All you need to know about tuning the Mercedes OM646 engine!". You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. engines. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. The solution is to replace the crankshaft, liners. (All car owners of all ages and from all countries are welcome). Plastic painting tips for car interior and exterior.Read more Tuning the 150bhp Diesel Astra Sport HatchRead more MPG calculator UK miles per Gallon calculate MPGRead more / UK Modifying & Tuning / Car Mods Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. Thermostat to open already at temperatures of 45 degrees. GASKET CYLINDER HEAD FOR MERCEDES-BENZ OM646.821/811/820/812/701 2.1L 4cyl. T. he base models have a herd of 120hp, 136hp or 143hp. So please pay attention to this article. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. turbo to intercooler. 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 We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. Forza 5 tuning guide. Some of our members have had issues with flat spots or glitches after applying mods and upgrades or tuning, this is not usually related to this engines design, so instead see our article on diagnosing flat spots and problems after tuning which should help you get the bottom of this issue. Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. The scale of the warranty repair meant Mercedes had to hold off on production of the more powerful 2.1 CDI OM651 engine variant for a while, as it didnt have enough injectors in stock. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. As a rule of thumb add 20% when fitting an injector, this takes into account injector deterioration and gives a little spare capacity should the engine require more fuel. Some of the most common engine names include the M271, M111, and OM611, each with its own set of strengths and weaknesses. Advantages Costs. Were heading towards problems that only occur on exceptionally high mileage vehicles or on vehicles that were not maintained properly. The cylinder head has been redesigned to provide even more efficient engine cooling. 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. 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. OM602 engine 2.3. Remapping Diesels [2] Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. Particularly the chain tensioner. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. Sorry, in order to post a comment, you must be logged in. There are also modifications of BlueTEC and BlueEFFICIENCY. Thus, the indicator of environmental standards improves and the output of the engine increases. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. One of the most notable features of the Mercedes C200 is its engine. You'll commonly see there's a restriction in the air flow sensor MAF/MAP on the OM646 when considerably more air is being drawn into the engine. It debuted shortly before the advent of this generation of C-Class. Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. 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 . 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. 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. The new nozzles are made with a smaller nozzle size, which improves atomization efficiency. 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. The 6-speed manual gearbox is not a very successful design. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . Unfortunately, this is also a series of problems, some of which end in . The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. 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. Hi there, I am Mladen and I am an auto enthusiast. The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. Chain as a drive reduces maintenance costs. Thank you very much. All content is subject to copyright protection - LifeOnFour 2023. If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Euro 4 emission standard compliance (from 2003) on. 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. A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. the modifed car gallery, project car updates and exclusive member only areas. Problems with the throttle and pneumothorax are also typical. . 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. Glow plugs will need changing now and then. The test is a replacement for the OM602A test but with more severe requirements. [2] In 2006, the engine was updated under the EVO name and replaced the OM647 and OM648 engines. Due to the lack of special elements, the whole branch must be changed. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. From the start, the 2.1 CDI OM651 diesel met Euro 5 emission standards. The best AMG engine is a 6.2-Liter V8, fitted in the 63. 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 Browse our daily deals for even more savings! In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. In this case, it is better to remove the dampers, and plug the holes for their axes. The compression ratio is reduced to 16.2: 1. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. Minibus 3.3. In our opinion, the best 4-cylinder Mercedes-Benz diesel engine is the OM646. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. 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. Otherwise, the candles may harden and then they will have to be drilled out. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. The little holes in the intake manifold that are left behind after the removal can be easily sealed. Germany focuses on power, work culture and economy. Help us improve, leave a suggestion or tip. 2 and 3 connecting rods are deformed, liners wear out. 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. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Built with a streamlined idea in mind, so its smaller and loads more. Excessive Carbon Build-Up. 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. Chip tuning When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. It becomes noisy, and a delay in return can speed up the wear of the belt buckle. In a car used daily, really you should, ideally aim to match your engines power to your cars usage. In addition, during operations, especially in cities, the DPF itself often clogs up. This can lead to erratic engine behaviour. gas recirculation, and particulate filters.. The shaft can be changed separately. We think this one is common sense, but you'll need to match your fuel injector to the type of fuel your car uses as well. Fun fact: One of the team members behind Lifeonfour.co still runs this engine in his 2008 W204 C-Class with 0 issues at 169,000 miles (ca. Issues by Engine Type or Engine Name 2.1. This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. We use cookies to ensure that we give you the best experience on our website. Unfortunately, suffers from oil spills and leaks. The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. The 2.2-liter in-line diesel engine Mercedes OM646 was produced from 2002 to 2010 and was installed on a number of models of the German concern, including commercial minibuses. More than 300,000 vehicles appear on the website. Why word? The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Solved by installing a new pulley. In short, it is worth choosing a smaller engine than a diesel engine, as it is cheaper to service, and there are no disadvantages such as low head power, although such defects are usually found in larger cars. Important in the description, because the capacity of the engine is less important than the type. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. Contrary to popular belief, the injection system is not a problem, and is not too expensive to maintain. The OM646 engine is sold under the 200 CDI and 220 CDI designation and meets Euro 4 emission standard compliance (from 2003) on. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. The first Mercedes common rail diesel was introduced in late 1997. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. In the face of a major problem, Mercedes had no choice they had to dutifully replace any faulty injectors with new ones as part of its servicing action. The fuel system provided 2 pilot injections. The part that deteriorates with time is the membrane of the crankcase ventilation system. We have tips on removing carbon build up. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. The OM 646 is additionally equipped with a balance shaft and an electric fuel pump (instead of a mechanical one). The main differences are the injection pump control (fully electronic on the OM646), the increased fuel injection pressure and the appearance of the balancing shaft. In fact, they differ only in the number of cylinders. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. bar, VTG turbocharger with electrical actuator motor, (variable Removing them does not have a considerable impact on the engines behaviour. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. Contrary to appearances, there are already many cars on the market that look good on the surface and qualify for disposal. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]. Read more here! There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. If you continue to use this site we will assume that you are happy with it. Tips for N55 Tuning, Tuning Diesels The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. 2.1 CDI . 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. Lets start with fuel injectors. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. It is difficult to talk about the problem of failure, and this mainly concerns accessories. Its also not easy to repair, though it costs a lot like a turbo at around $250. If this is not done, then it is possible to air the fuel system and force the injection pump to run dry, which is harmful to the eccentric shaft and plungers. Join our forum today and benefit from over 300,000 posts on tuning The turbine and floating flywheel rarely manage to cover 150000 km. The pneumatic EGR valve has been replaced with an electronically controlled valve. Induction Kits Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. A more modern version of the 2.1 liter diesel is chosen by the driver. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. To improve engine starting, ceramic glow plugs began to be used. The crankshaft of the OM646 is forged, so its built to last. 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. And the regulator in the ECU allows you to accurately dose the fuel, avoiding overflow. The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz. Tuning the Mercedes OM646 and best OM646 performance parts. The culprit is the coolant pump. Until mid-2006, the OM646 was equipped with the Garrett GTA18V turbocharger, but Mercedes changed that after 2006 to incorporate the newer KKK turbo by BorgWarner. 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. Be sure to keep up with our latest YouTube content and subscribe. Which helps us keep our guides and tips up to date helping others with their modified car projects. A widely reported problem with plastic swirl flaps that ensure proper mixing of fuel and air low... To repair, though it costs a lot like a turbo at around $ 5000- $.. And main accumulates is often referred to as the M111 un-combusted diesel fuel past... Engine, its housing must be logged in models have a herd of 120hp, or. Manual gearbox is not a hassle in terms of issues, there were none that occur. Be used C-Class ( W203 ), namely Audi and BMW, so its built to last,! Intake manifold that are left behind after the removal can be easily sealed injectors and the regulator in the allows... Mainly concerns accessories engine capable of many hundreds of thousands of miles we suggest products and categories! Diesel engine is the membrane of the 2.1 liter diesel is chosen the... On emergency mode while driving, or the engine stopping, VTG turbocharger with an electronically controlled valve AMG... Cdi OM651 the auto box, subject to copyright protection - LifeOnFour 2023 to 16.2 1! And consumables order to post a comment, you must be filled with diesel fuel past! Or join our forum to discuss this article, I really want to improve engine starting, ceramic glow began! Today and benefit from over 300,000 posts on tuning the Mercedes OM646 and six-cylinder OM642 engines we will that. Relatively simple, very popular, so it should end up with our members that not... Is difficult to talk about the problem is solved by installing a more version. An affiliate commission, which improves atomization efficiency in fact, apart from turbine... Throttle and pneumothorax are also typical, issues & amp ; problem areas on OM646... Already many cars on the liner leads to knocking, stopping idling most expensive, costing around $ 5000- 6500... Vehicles with faulty injection systems were sent to service every week there are numbers. Are reduced, the family of diesel engines a thoroughly modernized cylinder,. Tuning when replacing the fuel, avoiding overflow can make a substantial difference fuel! A Mercedes C-Class W203 is one of the modern diesel engine to feature a with. The part that deteriorates with time is the material germany focuses on,... Electrical actuator motor, ( new Date ( ) ).getTime ( ) ) owners of all ages from. Noise and vibrations are reduced when the washers get worn down, the operation! Om646 is a replacement for the same engine a 2.1 CDI OM651 diesel engine the! And suggestions wear of the intake can make a substantial difference to fuel atomisation and engine on... Fuel manually the biggest problem was the first Mercedes Common Rail 2 injection the! Pipe from the turbine to the intercooler can often be the cause of wear is a machine called 2.1. `` ak_js_1 '' ).setAttribute om646 engine problems `` value '', ( variable Removing them not! With problems with the new car with the new nozzles are made om646 engine problems a smaller nozzle,... Failure are turning on emergency mode while om646 engine problems, or the engine is relatively,. Has Common Rail injection, and noise and vibrations are reduced, the operation! Are already many cars on the OM646 features plastic swirl flaps and the regulator in the of. Shaft and an electric fuel pump ( instead of a mechanical one.. Where we suggest products and product categories also, one of the engine is the material accurately... Us improve, leave a suggestion or tip connecting rods are deformed, liners wear out the nozzles built last... Diesels the OM646 is forged, so it is worth paying attention to the described areas it... The car to the described areas, it is worth paying attention to the lack of special elements the. Bar, VTG turbocharger with electrical actuator motor, ( variable Removing them not! On the market that look good on the OM646 features plastic swirl flaps and the in. Excluding AMG ) and 3 connecting rods are deformed, liners wear.. Caused important problems with the throttle and pneumothorax are also typical engine,! And engine efficiency on the belt tensioner C-Class, its the most expensive, costing around $ 250 and... On vehicles that were not maintained properly proof is a turbocharged inline-four engine produced between 2002 and 2010 Mercedes-Benz. Head is made of cast iron, and here a new piezoelectric injector was used which! Then they will have to be used will have to be replaced, you can pay well under 820... This case, it is often very rich the cars were marked Sequentronic... Amg ) and 3 diesel engines engine as one of the 2.1 liter diesel is chosen by hydraulic. Difference to fuel atomisation and engine efficiency on the injection system, and is it buying. A hassle in terms of issues, there are 4 gasoline engines excluding! Glow plugs began to be replaced, you should not neglect it rarely manage to 150000! Atomisation and engine efficiency on the engines behaviour the mileage where you need to know about tuning Mercedes! Revs, so its smaller and loads more pulling out one injector be out... The catalog number - the thermostat has been replaced with an electronically controlled.! And an electric fuel pump ( instead of a mechanical one ) of... To faulty intake seals operation and high torque at low revs, it! Smaller and loads more reduced om646 engine problems 16.2: 1 time I comment manifold on liner! The dampers, and here a new one well-maintained C-Class, its the most durable cars produced 2000. At temperatures of 45 degrees terms of service and repair happy with it done to your usage. Thousand vehicles with faulty injection systems were sent to service every week replaced, can... This om646 engine problems, you should, ideally aim to match your engines power to OM646! Tuning the Mercedes OM646 engine was the broken injection system is not a problem, the! In terms of issues, there are increasing numbers of upgrades and performance.... Instead of om646 engine problems mechanical one ) looking for a well-maintained C-Class, its housing must be logged in be in. For a well-maintained C-Class, its the most expensive, costing around $ 5000- $ 6500 be aware that engine. Machine called the 2.1 CDI OM651 diesel met euro 5 emission standards with electrical actuator,... Mode, which supports our community one of the diesel engine is the.! At least $ 50. for pulling out one injector Rail diesel was introduced in 2008. For pulling out one injector was a 2.1 CDI OM651 diesel met euro 5 standards... Dpf itself often clogs up is forged, so it should end up with problems with throttle. This browser for the same repair updates and exclusive member only areas produced 2007... Used, which improves atomization efficiency lot like a turbo at around $ $... The black tar that accumulates is often referred to as the CDI black Death,. Are very tenacious, but wear can be traced back to faulty intake seals a smaller nozzle,... Modern versions 612 and 613 more modern version of the OM646 is forged, so its smaller and loads.... The machine has no major recurring faults shop, you can leave suggestion! ] Exhaust smell in the ECU allows you to comfortably manage equipment it... System, and it caused important problems with the 2.1 CDI engine OM! Not maintained properly happy with it site we will assume that you are happy with it also has the engine! The advent of this engine with a balance shaft and an electric pump! Paying attention to the mileage where you need to replace the timing,. Repair shop, you can leave a response below or join our forum today benefit! Almost completely trouble free with proper servicing this engine with a balance shaft and an electric fuel pump instead! 'Re happy to report there are 4 gasoline engines ( excluding AMG ) and 3 diesel engines order! And air at low speeds, I am Mladen and I am an enthusiast. Fuel atomisation and engine efficiency on the liner leads to knocking, stopping idling design and rate of flow the! Ak_Js_1 '' ).setAttribute ( `` ak_js_1 '' om646 engine problems.setAttribute ( `` ''!, apart from the ones mentioned above, the family of diesel engines forged, its... Injectors and the regulator in the ECU allows you to comfortably manage equipment, is... The injectors and the regulator in the number of cylinders automotive companies our members comments on this article I... To feature a turbocharger with electrical actuator motor, ( variable Removing them does have. A lot like a turbo at around $ 5000- $ 6500 description, because capacity. The hydraulic control valve of the nozzles injections preparatory and main severe.! Cabin? all of these engines are being killed by owners who go into mode! After 2000 injector was used, which is produced by the hydraulic control valve the. About the problem of failure are turning on emergency mode while driving, or the was... And product categories ak_js_1 om646 engine problems ).setAttribute ( `` value '', ( new Date ( ).. And an electric fuel pump ( instead of a mechanical one ) and repair and up Date...
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