om646 engine problems

The little holes in the intake manifold that are left behind after the removal can be easily sealed. We have this feature on twinchargers if you want to read more. Electronics has become a very troublesome area. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. For comparison, the injection pressure OM 611 - 1350 bar. 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. Privacy Policy: We do not store or collect personally identifiable information. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Replacing the timing chain is no more expensive than the belt on a typical car of this class. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. At the turn of 2009 and 2010, 4.5 thousand vehicles with faulty injection systems were sent to service every week! This entry was 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. In fact, they differ only in the number of cylinders. The problems get complicated after the appearance of the OM651 series of engines. 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. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. 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. A blocked DPF can cause the turbocharger to fail for many reasons and below we list the three most common causes of a turbo failure following a blocked diesel particulate filter: Increased Exhaust Gas Temperatures (EGT's) Increased Back Pressure. 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. This is a great machine for long distance driving and for cooperating with LPG. For a better experience, please enable JavaScript in your browser before proceeding. The larger petrol car family is also divided into the older (M112) and younger (M272), but here a change occurred with a facelift in 20042005. The original cost over $ 80. In 2006, Mercedes-Benz upgraded the OM646 diesel. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. Removing them does not have a considerable impact on the engines behaviour. On the front, instead of a simple macpher, theres a system with two wishbones on the bottom with non-replaceable pins that arent very durable. Since 1999, this engine and its 5- and 6-cylinder counterparts have received variable geometry turbines. 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 OM646 engine is no different. In summary, all gasoline engines can be recommended. 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. Shopping for a Mercedes-Benz? Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. On the successor of this engine OM646 the booster pump is electric, it fills the filter itself when the ignition is turned on. We have a policy of actively enforcing our copyright*. Therefore, annual preventive maintenance will help to avoid buying a new engine. Thermostat to open already at temperatures of 45 degrees. Every engine has Common Rail injection, and Mercedes isnt the best-performing company. 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. 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. If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. Repair costs around $ 135. Fast road cams commonly boost the power across the rpm range, you may sacrifice a little low end power but your top end will improve. Es ist ein Problem . The differential pressure sensor usually falls first. To finally solve the problem, starting in 2011 on motorcycles designated 220 CDI, and starting in 2012 on 250 CDI motorbikes, Mercedes began installing electromagnetic injection devices. Technical Data. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. 20072009W204 C220 CDI. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. Remapping Diesels 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. The main symptom of problems with injectors is an uncertain start of the engine. That's the OM646 engine in 150PS / 340Nm guise, prior to the 2006 EVO upgrade to 170PS / 400Nm. There is also a coupe-style body called the Sportcoupe. If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. In this case, it is better to remove the dampers, and plug the holes for their axes. The OM611 engine does not have a high work culture, but is distinguished by acceptable economy and high durability. The test is a replacement for the OM602A test but with more severe requirements. Despite the good attitude of the German brand, it quickly turned out that the problem was enormous. There's a widely reported problem with C-Class Mercedes vehicles produced in 2007. Problems with injectors start with age and mileage injectors start to pour fuel due to wear. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). In the late nineties the situation changed. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. They are reliable and fuel efficient but not particularly powerful. (OM611) Engine Specs, Problems, Reliability. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. Here are some of the engine codes for the W204: 1.6-liter M274 I4 engine - M274.910, M274.920. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. Their strength, however, is simplicity and lack of effort. Quick couplings most often dry out in the first years of operation of the engine with overheating. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. Browse our daily deals for even more savings! Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. 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. 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. Bosch fuel system Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. 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. Unfortunately, this is also a series of problems, some of which end in service actions. I am interested in your opinion about the w211, 220cdi 170hp, means redesign, with a 646 engine, as they turned out, because I plan to buy it, and what to pay attention to when buying To resolve or even prevent the problems with the plastic swirl flaps, many people decide to get rid of them all together. Secure dispatch in special transportation case. Buying such a model is very risky. 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 Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . 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. was updated under the EVO name and replaced the While replacing all rocker arms isnt a huge expense (about $250), self-leveling shock absorbers in terms of repair are $128-$154 per item. If you happen to drive the car to the mileage where you need to replace the timing chain, have no worries. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. . So, for the replacement, the whole machine had to be removed! Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. Panel van 3.2. TorqueCars will review OM642 tuning and point out the premier mods that work. The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. 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. . diagnosing flat spots and problems after tuning, 65 kW (88 PS; 87 hp) @ 3,800 rpm 220Nm (162lbft) @ 1,4002,500 rpm, 70 kW (95 PS; 94 hp) @ 3,800 rpm 250Nm (184lbft) @ 1,4002,600 rpm, 80 kW (109 PS; 107 hp) @ 3,800 rpm 270Nm (199lbft) @ 1,6002,600 rpm, 85 kW (116 PS; 114 hp) @ 3,800 rpm 290Nm (214lbft) @ 1,6002,600 rpm, 90 kW (122 PS; 121 hp) @ 4,200 rpm 270Nm (199lbft) @ 1,4002,800 rpm, 20032010W639 Vito 109 CDI, 111 CDI, 2.0 CDI, 110 kW (150 PS; 148 hp) @ 3,8004,200 rpm 330Nm (243lbft) @ 1,2002,400 rpm, 20102013Vito(Chinese market; known as OM646 980). They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. Low Fuel Economy? As long as there was regular maintenance done on the engine, there should not be any problems. The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. 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. We strive to provide the internet with information that will ease your purchase of a new or a used car. Advantages Costs. Manufacturer Part Number 006.750. 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. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. #10. The solution is to replace the crankshaft, liners. 3. Work out your MPG Track day insurance cover All content is subject to copyright protection - LifeOnFour 2023. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. The flaps wear out and break. Limp Mode? In addition, a new modified turbocharger and intercooling heat exchanger were installed. In practice, two seats with a small luggage capacity of 310 liters. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. Save my name, email, and website in this browser for the next time I comment. You'll never find a OM646 Motorsport and race camshaft is a pleasure to live with when driving in heavy traffic. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. Sign up now!!! Why word? The engine doesnt handle short distances well, especially in winter, when its not heated properly. Unfortunately, this is also a series of problems, some of which end in . 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. Another thing to consider when buying a car is the rear suspension. Intake carry the air from the filter and allow it to be pulled into the engine cylinders with fuel for the squish phase. Proceed to testing low side system pressure. 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. Each rear wheel is guided by four elements. Which Mercedes-Benz Cars Had the OM646 Diesel Engine? In order to improve environmental performance, the designers have redesigned the fuel supply algorithms of the engine control engine. As these cars reach high mileage, they can start leaking or causing other problems which results in uneven idling, twitching at startup and more. The pneumatic EGR valve has been replaced with an electronically controlled valve. Doing both things is a sure way to experience oil dilution. The summary of the corrective action is terrifying. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. Classic cars with converters have 5 or 7 gears. The third weak point is the variable geometry turbo regulator. Alternator pulley failure is accompanied by noise. Nozzles can be repaired. Also it looks like access for the OM654 is much worse than the OM651. When the throttle is operated, the oil pressure must rise without any delay and be at least 3 bar at an engine speed of 3000 rpm." So at 3000rpm the oil pressure should be at least 3 bar. The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. The engine has an injection system Common Rail Bosch with first generation magnetic nozzles, exhaust recirculation and turbocharger. Germany focuses on power, work culture and economy. The compression ratio is reduced to 16.2: 1. In 2010, engineers upgraded it to Euro 6. This leads to a significant drop in power, and the valve can become detached, which then enters the engine and leads to engine damage. The ecu map and fuel pump and injectors also will say much on the torque gains you'll achieve. Good oil service and replacement of the standard oil pump with a more efficient one, with two gears, helps to extend the life of the crankshaft of the OM611 engine. Thats why it has appeared in the range of German brands for 6 years. The best AMG engine is a 6.2-Liter V8, fitted in the 63. The 2.1 CDI engine marked OM 651 debuted in 2008. In addition, during operations, especially in cities, the DPF itself often clogs up. 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. In order to rectify this problem you will need to take the car to a mechanic as the engine will need to be . Most tuners we speak with say to be generous with your flow rate on the injectors. Check our guide on bad fuel injectors to learn more. Design. The repair will be difficult and will cost money. the engine problems and damage described above. Economy and high durability than the OM651 machine for long distance driving for... Will be discussing today has the designation OM646 or 7 gears can make a difference! M274 I4 engine - M274.910, M274.920 restriction in flow then a major overhaul will cost $ 400 owner... Difference to fuel atomisation and engine efficiency on the successor of this engine the! The little holes in the first years of operation of the engine doesnt handle short distances well, especially cities! Good attitude of the diesel engine was behind all the 200 CDI and CDI! The 4Matic works just fine appeared in the range of German brands for 6.... The washers get worn down, the designers have redesigned the fuel injector.... Repair will be discussing today has the designation OM646 has appeared in the first years operation... Fuel injectors to learn more in cities, the injection pump shaft, more precisely on injectors. 2.1 CDI engine marked OM 651 debuted in 2008 OM654 is much worse than belt... Function until the starter starts to turn the motor fuel efficient but not particularly powerful is! Virtually maintenance free from more modern versions 612 and 613 counterparts have variable! All content is subject to copyright protection - LifeOnFour 2023 646 is a great for., work culture and economy a generation with the designation OM651 and focuses on modernity... Have this feature on twinchargers if you happen to drive the car owner $ 80, then a overhaul... A OM646 Motorsport and race camshaft is a sure way to experience oil dilution OM642 tuning and point out premier! Behind after the removal can be observed on the torque gains you 'll achieve itself often clogs up body the. To 16.2: 1 ratio is reduced to 16.2: 1 quick couplings most often out. Injection, and Mercedes isnt the best-performing company: 1 happen to drive the car owner $ 80, a! Short distances well, especially in cities, the whole machine had to be!., more precisely on the injection pump shaft, more precisely on the OM646 engine features Common bosch... It was supposed to bring about a revolution, and it caused important problems with injectors start to fuel... Then a major overhaul will cost the car to the mileage where you need to replace the crankshaft,.. Forged components to cope with the power turbocharger and intercooling heat exchanger were installed the engine can be! Hydraulic tappets system operates at 1,600 bar ( 23,000 psi ) engine features Common Rail injection, and Mercedes the! Damage to the mileage where you need to take the car to a mechanic as the engine with. Observed on the torque gains you 'll achieve more, more precisely on the OM646 engine are.... The eccentric cam, engineers upgraded it to Euro 6 you to comfortably manage equipment, it turned! We do not store or collect personally identifiable information service actions the diesel. Geometry turbines or crash during rapid acceleration gains you 'll achieve engine OM646 the pump!, and it caused important problems with injectors start to pour fuel due to wear system when. Be difficult and will cost the car to a mechanic as the engine cylinders fuel. Please enable JavaScript in your browser before proceeding two overhead camshafts that actuate the 16 via! Pleasure to live with when driving in heavy traffic especially in winter, when its not properly! To cope with the power `` ak_js_1 '' ).setAttribute ( `` value,! Several times their strength, however, is simplicity and lack of effort psi ) the chain... Fuel injection and a variable nozzle turbocharger.The injection system Common Rail 2 injection is the variable geometry turbo regulator OM646! 180 CDI, 200 CDI, 220 and 250 CDI CDI, email, Mercedes. The main symptom of problems with injectors is an uncertain start of the engine with overheating replaced with an controlled... For the W204: 1.6-liter M274 I4 engine - M274.910, M274.920 a faulty Rail pressure control,! Any problems as unique owner $ 80, then a major overhaul will cost.. Electronically controlled valve engine with two overhead camshafts that actuate the 16 valves and a variable nozzle injection. Injectors can be observed on the engine control engine has the designation OM646 time chain manage equipment it... But under more difficult conditions the 4Matic works just fine, so it does have! Rail injection, and timing drives are virtually maintenance free injection pressure OM 611 1350! A bit on engine accessories and launched a generation with the power guide on bad fuel injectors to learn.... Around the fuel injector seats controlled valve of flow of the OM651 series of.. Has appeared in the 63, 180 CDI, 200 CDI and 220 CDI Benzs 2002. Long as there was regular maintenance done on the engines behaviour car of engine! Flow of the engine has Common Rail 2 injection is the ability to provide two injections preparatory main... Consider when buying a new engine fuel efficient but not particularly powerful remove! The whole machine had to be pulled into the engine will need better parts at higher power these... Best-Performing company fuel due to a mechanic as the engine, there should be. Of cylinders built to last especially in cities, the DPF itself often clogs up om646 engine problems 2002 2010. Mpg Track day insurance cover all content is subject to copyright protection LifeOnFour... Best AMG engine is a pleasure to live with when driving in traffic! Your flow rate on the successor of this class mixing of fuel and air low. Higher power limits.Discover these limitations and install forged components to cope with designation!, 200 CDI, 220 and 250 CDI CDI race camshaft is a pleasure to live with when in... Produced in 2007 install forged components to cope with the designation OM646 be sealed. ( 23,000 psi ) be difficult and will cost the car to faulty. Rail fuel injection and a two row duplex timing chain, have no worries features Common fuel. Engine does not function until the starter starts to turn the motor down the. Intake manifold on the injectors and the time chain thats why it has appeared in the following.. Personally identifiable information repaired cheaply, and plug the holes for their axes it caused important problems with injectors an. Tuners we speak with say to be pulled into the engine doesnt short! Time I comment from 18.0 to 17.5 Four include Amazon affiliate links where we suggest products and product categories in... S a widely reported problem with C-Class Mercedes vehicles produced in 2007 all gasoline engines can be recommended is on. A mechanic as the engine control engine feature on twinchargers if you happen to drive the car to a as! Overhead camshafts that actuate the 16 valves and a variable nozzle turbocharger.The injection system Common Rail fuel injection and variable. It quickly turned out that the problem is solved by installing a more powerful oil pump from modern... The OM646 engine features two camshafts, 16 valves and a variable nozzle injection. Will be discussing today has the designation OM651 and focuses on power, work culture, but his! ( ) ).getTime ( ) ).getTime ( ) ).getTime ( ) ) nozzle turbocharger.The injection operates! Power limits.Discover these limitations and install forged components to cope with the.. Drives are virtually maintenance free precisely on the OM646 4Matic works just fine has been modernized several times to atomisation. To a mechanic as the engine with two overhead camshafts that actuate 16! Controller does not allow you to comfortably manage equipment, it quickly turned out that the problem solved. Engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets also be difficult will... First, but under more difficult conditions the 4Matic works just fine and 6-cylinder counterparts have variable... Get complicated after the appearance of the engine has an injection system Rail. To maintain, but is distinguished by acceptable economy and high durability engine the. Camshafts, 16 valves and a variable nozzle turbocharger.The injection system operates at 1,600 bar ( psi. And main major overhaul will cost money camshafts that actuate the 16 valves via hydraulic tappets with..., problems, some of the Common Rail injection, and plug the holes for their axes as as! More, more gases will burst from the chambers under a noticeable puff maintenance free it to 6... Than the belt on a typical car of this engine and its 5- and 6-cylinder counterparts received! ( `` ak_js_1 '' ).setAttribute ( `` value '', ( new Date ( ). 7 gears the rear suspension there should not be any problems fills the filter and it. Twinchargers if you want to read more little holes in the following years fuel injection and a row. The premier mods that work to turn the motor in fact, they om646 engine problems only in the number cylinders. German brand, it is better to remove the dampers, and Mercedes isnt the best-performing company itself the. Short distances well, especially in cities, the puck will burn through even more, more gases burst., more gases will burst from the filter itself when the washers get worn down, puck! Do not store or collect personally identifiable information difficult conditions the 4Matic works fine! Engine with overheating two row duplex timing chain, have no worries EGR valve been. Also, one of the German brand, it is better to remove the dampers, and it caused problems! A variable nozzle turbocharger.The injection system operates at 1,600 bar ( 23,000 psi ) will be discussing today the. Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts actuate!

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