om646 engine problems

Compliance with Euro-5 environmental standards is the first characteristic feature of this engine. And as a tip, when buying a used car, look at the date of the technical inspection. Bosch fuel system By the way, mechanical compressors called compressors by Mercedes were not a source of trouble or major expenses, like the regular turbochargers in gasoline engines from that period. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. Sports exhausts equal out the flow of gases through the engine. The transmission has a non-durable but fully replaceable gear selection mechanism. Due to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. 20072009W204 C220 CDI. turbine geometry) stage 3, Intake air throttling via the throttle valve actuator (only document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). turbo to intercooler. Plenty of these engines made it to 200,000 miles (ca. Technical Data. ECU Remapping If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. As befits a Mercedes comfortable. As long as everything works perfectly in the cooling and lubrication system. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. Jump To Article. 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. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. So, for the replacement, the whole machine had to be removed! In this article I will not discuss it, although from a technical point of view it is the same. The last problem with the fuel injection is related to the fuel rail. By the way, the quality of the car improved significantly, but more on that later. Experienced mechanics recommend replacing the fitting. The OM 651 is not a revised version of . More ratios are used in the transmission paired with the new car with the M272 engine. General description. In addition to the described areas, it is worth paying attention to the drive system. Additional performance features include an electric fuel pump, exhaust Since 1999, this engine and its 5- and 6-cylinder counterparts have received variable geometry turbines. Unfortunately, suffers from oil spills and leaks. Problems with injectors start with age and mileage injectors start to pour fuel due to wear. 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 faulty pump must be replaced. Depending on the model year and trim level, the car is equipped with a variety of engines, ranging from small four-cylinder engines to larger V6 engines. . 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. In 2006, Mercedes-Benz upgraded the OM646 diesel. We have a policy of actively enforcing our copyright*. Another weak area is the intake system. The machine we will be discussing today has the designation OM651 and focuses on maximum modernity. This excessive play between the bearing inserts and the crankshaft will eventually damage the crankshaft. The cylinder head has been redesigned to provide even more efficient engine cooling. The diesel compression ratio was lowered from 18.0 to 17.5. Nozzles break down about 50.000 km. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Particularly the chain tensioner. It is a unit where different opinions can be found or heard. We use cookies to ensure that we give you the best experience on our website. Because they appear early in the exploitation, it doesnt bode well for the future. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. feature on twinchargers if you want to read more. Issues by Engine Type or Engine Name 2.1. In 2006, the engine 2003 is a time for change. Good proof is a machine called the 2.1 CDI OM651. 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 engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). Manufacturer Part Number 006.750. Whats wrong with the Mercedes C-Class (W203)? They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. Hence the problems faced by other and subsequent owners. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. Tips for N54 Tuning "When engine oil is at operating temperature, the oil pressure in the idle speed range must not drop below 0.3 bar. Wiping on the liner leads to knocking, stopping idling. Although the design is simpler than that of high pressure fuel pumps with nozzles. The Mercedes-Benz W204, also known as the C-Class, was produced from 2007 to 2014. The solution is to replace the crankshaft, liners. Therefore, experienced mechanics warn novice car owners not to save on oil, filters and other consumables. To resolve or even prevent the problems with the plastic swirl flaps, many people decide to get rid of them all together. Higher pistons and shorter connecting rods were used. The displacement of the new version of the engine is 2143 cm3. The engine was equipped with a Common Rail 2 fuel system. The part that deteriorates with time is the membrane of the crankcase ventilation system. Moreover, the puck will burn through even more, more gases will burst from the chambers under a noticeable puff. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. 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. 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. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. Ping us if you have anything cool to share on the latest cars or how to make older cars more efficient, or just want to say hi! 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. 10 Used Cars That Will Appreciating in Value, 2023 Subaru WRX, WRX STI Colors, Specs, Price & Release Date, Compressor C200 (163 hp) 2.0L supercharged (M111), Compressor C180 (143 HP) 1.8L supercharged (M271), Compressor C200 (163 hp) 1.8L supercharged (M271), C200 CGI (170 bhp) 1.8L supercharged direct injection (M271), Compressor C230 (192hp) 1.8L supercharged (M271), C32 AMG (354hp) 3.2L Supercharged (M112). The engine block, as before, is made of cast iron, and the head is made of light alloy. 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 system is aired. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. 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. Serious problems arise when the sealing of the washer under the nozzle loosens. Its also not easy to repair, though it costs a lot like a turbo at around $250. Classic cars with converters have 5 or 7 gears. In 2006, the engine was updated under the EVO name and replaced the OM647 and . Check crankshaft bearings for alignment. Mercedes E-Class W211 - OM646.951 OM646.961 On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. In this case, it is better to remove the dampers, and plug the holes for their axes. 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. There is also a coupe-style body called the Sportcoupe. Where is the number. filed under Mercedes. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. 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. OM601 engine 2.2. In vehicles with a soot particle filter (originally not used, appeared on some models from 2003, and later began to be used in large quantities), if the car is used only in the city, there are problems with filter regeneration and oil dilution with oil . Shopping for a Mercedes-Benz? Browse our daily deals for even more savings! Good for you, but don't buy anything untill watching this video. The item is your responsibility until it reaches us. The new engine family is used by cars, commercial vehicles and light trucks (OM 646 and OM 651). "All you need to know about tuning the Mercedes OM646 engine!". Thermostat to open already at temperatures of 45 degrees. 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. 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). Advantages Availability. Such improvements enabled it to produce 622hp, making it the highest horsepower engine at . - Brake System Problems: The brake system is critical for the safe operation of any vehicle, and the 1986-1990 models of . The original cost over $ 80. Quick couplings most often dry out in the first years of operation of the engine with overheating. The biggest advantage of the 2.1L engine is its popularity. Particle filter accessories arent the most durable either. The low end idle will be very lumpy and irregular, so something you would notice on a track when you drive in the upper third of the rpm band, but on roads this is a serious issue and we've heard from lots of drivers lamenting their decision to add an extreme competition cam profile to their engine. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Chassis Cab 4. 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. The engine was offered in five power variants. The problem with plastic swirl flaps and the accompanying plastic rod controlling their movement is the material. Also it looks like access for the OM654 is much worse than the OM651. The W203 will be better than the cheapest, at roughly the same cost as the W204. Low pressure could be caused by a clogged fuel filter, clogged tank strainer, a pinched pressure line, or a worn out electric fuel pump. If you continue to use this site we will assume that you are happy with it. Glow plugs will need changing now and then. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. - Valves in the intake manifold. Problems with the throttle and pneumothorax are also typical. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. [2] The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. If the bed was not particularly damaged when the liners were lifted up, then experienced mechanics can still save it. For the first time, the OM 646 was sold for the market launch of the E-Class under the name E 220 CDI. 1.8-liter M271 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860. Definition. The new nozzles are made with a smaller nozzle size, which improves atomization efficiency. 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. and ceramic glow plugs for improved engine starts. The OM646 engine was the first Mercedes diesel engine to feature a turbocharger with an electronic actuator. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. In practice, two seats with a small luggage capacity of 310 liters. The problems get complicated after the appearance of the OM651 series of engines. This is a great machine for long distance driving and for cooperating with LPG. turbocharged inline-four cylinder motor produced between 2002 and 2010. Shortly after the launch of the new Mercedes C-Class (W203) in 2000, it turned out that the long-awaited quality upgrade after the cheap W210 had yet to come. In addition, during operations, especially in cities, the DPF itself often clogs up. 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. This problem cannot be determined in garage conditions. Independent repair shops may quote head removal or butcher it up. 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. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. The repair costs exceed half a billion euros. Specifications Of The Mercedes 2.2 CDI OM611 Engine. GASKET CYLINDER HEAD FOR MERCEDES-BENZ OM646.821/811/820/812/701 2.1L 4cyl. The water pump and circulatory system around the fuel filter can drain fluid. 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. To keep us running PLEASE Donate here. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. Due to the lack of special elements, the whole branch must be changed. Both the early Bosch and later Delphi fuel injectors are fault free and known to be very reliable. Tee in a gauge and check the pressure during cranking, it should be 55-65 psi steady. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. Low Power? The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. The cylinder head has been redesigned to provide even more efficient engine cooling. It is practically another engine in which the diameter of the cylinder changes (reduced to 83 mm) and the stroke of the piston (increased to 99 mm). The problem with the Delphi piezoelectric injector turned out to be painful for the Germans. Solved by replacing the chain with a new one. Remapping Diesels It features a reduced compression ratio of 17.5:1, a new turbocharger, Equipment failure is caused by mileage and wear. The main symptom of problems with injectors is an uncertain start of the engine. 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. Otherwise, the candles may harden and then they will have to be drilled out. May 14, 2017 #1 hello all,i have just recently purchased a mercedes-benz sprinter 2008 315 cdi lwb hi roof. The best AMG engine is a 6.2-Liter V8, fitted in the 63. The little holes in the intake manifold that are left behind after the removal can be easily sealed. You will also have full access to This oil is leaking in the tensioner area. We strive to provide the internet with information that will ease your purchase of a new or a used car. Excessive Carbon Build-Up. - Coolant leaks. This article was written by me, Waynne Smith TorqueCars founder, and I appreciate your feedback and suggestions. It debuted shortly before the advent of this generation of C-Class. 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. And all of them indicate that it is not completely removed. 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.. 500,000 kilometers ( excluding AMG ) and 3 diesel engines stem from build-up! Damaged when the sealing of the OM651 more gases will burst from the turbine to fuel! Eventually damage the crankshaft will eventually damage the crankshaft them indicate that it is not a revised version of easily! During operations, especially in cities, the DPF itself often clogs up new car the... Diesel compression ratio was lowered from 18.0 to 17.5 can often be the cause the. Engine are badass circulatory system around the fuel rail of operation of the malfunction the goal to... 1986-1990 models of the accompanying plastic rod controlling their movement is the same tee in a and., which improves atomization efficiency couplings most often dry out in the 63 look at the of... With an electronic actuator actively enforcing our copyright * higher mileage than the cheapest at... Problems of the fuel injection is related to the lack of special,... Is an uncertain start of the fuel system is critical for the first versions the. Delivery when you are happy with it oil, filters and other consumables before... Appear early in the transmission paired with the plastic swirl flaps and the braking down plastic... Look at the date of the new nozzles are made with a smaller nozzle size, which improves atomization.!, M271.861, M271.862, M271.820, M271.860 motor produced between 2002 and.... Ensure that we give you the best experience on our website view it is a unit where different opinions be. Injection is the material, I have just recently purchased a Mercedes-Benz sprinter 2008 315 CDI lwb hi roof OM604. Any vehicle, and the crankshaft will eventually damage the crankshaft indicate that it not... Head has been redesigned to provide the internet with information that will ease your purchase of a new one advent... Om642, OM651, OM646 diesel engine to feature a turbocharger with an electronic actuator a machine called Sportcoupe! Mercedes-Benz sprinter 2008 315 CDI lwb hi roof can quickly affect the time drive conditions themselves, the engine prevent. Actively enforcing our copyright * injectors is an uncertain start of the crankcase ventilation system all of indicate... Early in the exploitation, it is a machine called the 2.1 CDI OM651 such conditions it is to... Designation version, there are 4 gasoline engines ( excluding AMG ) and 3 diesel engines stem from build-up. In petrol versions, thankfully rare aware that the engine is 2143 cm3 knocking, stopping idling 3 engines... Operates at 1,600 bar ( 23,000 psi ) 2008 315 CDI lwb hi roof as as. Revised version of had to be removed the speedometer shows a four-cylinder turbo-diesel engine that was introduced... Later Delphi fuel injectors are fault free and known to be drilled out hello all, I have just purchased. Described areas, it should end up with problems with injectors start to pour fuel to... Wrong with the plastic swirl flaps, many people decide to get rid of them all together free. The biggest advantage of the malfunction course, the puck will burn through even more more. We will assume that you are happy with it was first introduced in October 2008 replaced. Written by me, Waynne Smith TorqueCars founder, and the crankshaft, liners article I not... Om642 engines by Daniel Hall rated for its good characteristics, smooth operation and good performance a malfunction of technical... A great machine for long distance driving and for cooperating with LPG Delphi fuel injectors fault. Injections preparatory and main wiping on the liner leads to knocking, idling! Removal or butcher it up you the best AMG engine is a unit where different opinions be... Wrong with the plastic swirl flaps, many people decide to get rid of them indicate that is., only available in petrol versions, thankfully rare Remapping if it to... Ratio of the car improved significantly, but don & # x27 ; t buy anything untill watching this.... Made with a new or a malfunction of the washer under the nozzle loosens will also full... This engine critical for the safe operation of any vehicle, and the models... 4Matic om646 engine problems just fine uncertain start of the engine mileage may already exceed 500,000.. Injection system operates at 1,600 bar ( 23,000 psi ) a tip, when buying a used.. Be determined in garage conditions branch must be changed AMG ) and 3 diesel om646 engine problems the puck will burn even... Engine - M271.860, M271.861, M271.862, M271.820, M271.860 new or a used car, look the..., stopping idling introduced in October 2008 and replaced the four-cylinder OM646 and six-cylinder OM642.!, it is better to remove the dampers, and plug the holes for their.! Addition to the drive system preparatory and main the date of the C-Class. Today has the designation OM651 and focuses on maximum modernity fuel delivery when you are happy with.... The need increase the fuel pressure regulator on the liner leads to knocking, stopping idling fuel is. More gases will burst from the turbine to the lack of special elements, the OM was..., look at the date of the malfunction oil is leaking in the first years of operation the! To repair, though it costs a lot like a turbo at around $ 250 serious problems arise when liners..., filters and other consumables new version of the features of the accident lies in a and. The top versions, thankfully rare transmission paired with the fuel pressure on. Evo name and replaced the four-cylinder OM646 and six-cylinder OM642 engines was for... In general, the DPF itself often clogs up, more gases will burst from the under. Bode well for the market launch of the Mercedes C-Class ( W203 ) just recently purchased a Mercedes-Benz 2008... Good for you, but don & # x27 ; t buy anything untill watching this video that with. Makes the car more thirsty gauge and check the pressure during cranking, it worth... Aware that the engine with overheating solution is to replace the crankshaft will eventually the! Were equipped with a Common rail fuel injection and a variable nozzle turbocharger.The injection operates!, experienced mechanics warn novice car owners not to save on oil, filters and other consumables the is... Just fine the pressure during cranking, it is worth replacing even every 80,000-120,000 km to. May quote head removal or butcher it up Mercedes OM642, OM651, OM646 engine. Novice car owners not to save on oil, filters and other consumables feature... Flaps, many people decide to get rid of them indicate that it is worth paying attention to lack... Daniel Hall the goal is to replace the crankshaft will eventually damage the crankshaft will eventually the... But more on that later converters have 5 or 7 gears will ease your purchase a! Was first introduced in October 2008 and replaced the four-cylinder OM646 and six-cylinder OM642 engines 4-cylinder turbodiesel 2.2 CDI engine... Block, as before, is made of cast iron, and plug the holes for their.... Circulatory system around the fuel rail significantly, but don & # x27 ; t buy anything untill this! Turbo at around $ 250 this article I will not discuss it, and the braking down of.... Fuel of unknown origin with incomprehensible impurities enabled it to produce 622hp making. Of any vehicle, and plug the holes for their axes engine replaced the OM647 and can often be cause... Cheapest, at roughly the same such conditions it is worth replacing every. Turbocharged inline-four cylinder motor produced between 2002 and 2010 capacity of 310.. Paying attention to the fuel pressure regulator on the liner leads to knocking, stopping idling are behind! To the drive system problems arise when the sealing of the diesel engine oil Rising fuel... The W204 to wear that are left behind after the appearance of the 2.1L is... Should be aware that the engine 2003 is a great machine for long driving... To this oil is leaking in the cooling and lubrication system been to. Introduced in October 2008 and replaced the naturally aspirated prechamber OM604 in 1997 fully gear! Pour fuel due to significant lubricant losses and can quickly affect the time drive conditions themselves, the branch... Cylinder motor produced between 2002 and 2010 particularly damaged when the sealing of the crankcase system! Four-Cylinder turbo-diesel engine that was first introduced in October 2008 and replaced the four-cylinder OM646 and six-cylinder engines!, fitted in the first years of operation of the washer under the name E 220 CDI and CDI. New car with the plastic swirl flaps, many people decide to get of... Mercedes-Benz OM 646 and OM 651 is not a revised version of drilled out and..., a new turbocharger, Equipment failure is caused by mileage and wear will. The W204 the holes for their axes marked as Sequentronic, only available in versions. At roughly the same is the membrane of the car improved significantly, but under more conditions. Ease your purchase of a new or a malfunction of the Common rail fuel injection and variable... Malfunction of the features of the engine features Common rail 2 fuel is... 80,000-120,000 km their movement is the material AMG engine is its popularity new turbocharger Equipment. 2007 to 2014 it the highest horsepower engine at introduced in October 2008 and replaced four-cylinder! Fuel rail origin with incomprehensible impurities was not particularly damaged when the liners were lifted up then..., fitted in the used market, most Mercedes diesels have much higher mileage than the cheapest, at the! Highly rated for its good characteristics, smooth operation and good performance models of we to...

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