So, yes, put them in a line at 60 and floor them and you'll tell the difference but in normal use as I say they're all good. 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. How much and is it worth buying a Mercedes C-Class (W203)? 3. Which Mercedes Cars Have the OM612 Engine? These engines have no issues reaching upwards of 300,000 miles (ca. Join our forum today and benefit from over 300,000 posts on tuning That seems to be steady trend for years and M1 doesn't worry about it, nor MB USA. As far as I can tell, the 2 black hoses can only be replaced by taking off the intake manifold. The only solution is to replace the faulty CKP sensor. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Oil leaks. Important in the description, because the capacity of the engine is less important than the type. Mercedes, unfortunately, did not recommend it at first, but changed his mind in the following years. The EGR valve can get blocked up by a mixture of carbon and oil deposits. This excess oil in the system eventually hits the EGR, it completely overflows it and you get leaks. These cookies are required to enable core functionality such as security, network management, and accessibility. Many owners decide to get rid of the EGR completely. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. This is very similar to the symptoms here. Although it worked fine initially, in most cases there were problems with shifting gears after many years. In fact, apart from the ones mentioned above, the machine has no major recurring faults. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Fuel Rail pressure regulator!, sticky and degraded.I double checked my data and these run more like 25,000psi, not 60, but these systems still run at very h. Crankcase position sensor. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. 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. Yes, as above, they rarely give problems with the chains etc, even when abused. 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. Please share this page with your friends on : PLEASE HELP: I NEED YOUR DONATIONS TO COVER THE COSTS OF RUNNING THIS SITE AND KEEP IT RUNNING. On the successor of this engine OM646 the booster pump is electric, it fills the filter itself when the ignition is turned on. The more air you can get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. In this article, we find out if the Mercedes Benz 2.7 litre diesel engine is reliable? 128,748 km) is the only solution. 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 good news is the high durability of the timing chain and the resistance of this engine to torture. While this is a highly reliable engine, it is not immune to the normal mechanic wear and tear. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. The engine is turbocharged and intercooled. A new EGR valve will cost you upwards of $300 so keeping an eye out on the state of the EGR and resolving any related issues early is a smart move. An oxidation catalyst is used to clean the outlet gases. Electronics has become a very troublesome area. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. Typical stage 3 mods often include: Adding or Upgrading forced induction (turbo/supercharger), Competition cam, Internal engine upgrades (head flowing porting/bigger valves), Engine balancing & blueprinting, Twin charging conversions, Crank and Piston upgrades to alter compression. Cookies set by third parties may be required to power functionality in conjunction with various service providers for security, analytics, performance or advertising purposes. Testing the glow plug separately is a must. Classic cars with converters have 5 or 7 gears. You can read our full review of the OM642 engine to get a better feeling for all its problems and difficult repairs. 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. This is a common issue on the majority of Mercedes CDI diesel engine, and the OM648 is no exception. Buying such a model is very risky. 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. The OM611, OM612 and OM613 turbo-diesel engines had cast iron blocks, alloy cylinder heads, common-rail injection, double overhead camshafts (duplex chain-driven), four valves per cylinder (actuated by tappets) and exhaust gas recirculation. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. Extending exhaust or intake durations can alter the bhp band and on most engines the exhaust and intake durations do not need to match, although most cams and tuners use matched pairs there are some advantages to extending the intake or exhaust durations. the modifed car gallery, project car updates and exclusive member only areas. 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. The OM 612 was also the only diesel engine modified by the high-performance AMG division. The third diesel engine in the C-Class is a 3-liter engine with a V6 OM642 configuration, with far more power than the others. When replacing the fuel filter on the 2.2 CDI OM611 Engine, its housing must be filled with diesel fuel manually. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. Following are the models that used the OM612. Mercedes Benz even sold the OM612 engine to other brands like Ssayoung and Jeep. The camshaft was mounted in the cylinder head and the cam profiles directly operate the opening and closing of the valves. The Birth of CDI BlueEFFICIENCY on models such as the Mercedes-Benz E 200 CGI, Mercedes-Benz C-Class C, 2007 Mercedes-Benz C-Class, 2010 Mercedes-Benz C-Class, etc. The majority of these cars have covered many miles by now. Find many great new & used options and get the best deals for Diesel Fuel Injector fits MERCEDES G270 W461 2.7D 03 to 07 OM612.966 Nozzle at the best online prices at eBay! Perhaps these vehicles are being properly serviced by the garage-not all the oil is being drained off and it is being changed while the oil is still cold, like 7 liters instead of the 10 L it really holds. Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. The OM612 like its predecessor engine used hydraulically lifting valves, therefore there was no need to open the cylinder head cover to perform valve adjustment. 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. Common Mercedes OM648 Engine Problems. Chip tuning In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. Their pistons are exactly the same. Another problem is carbon and oil deposits. Click here to see my credentials (why you can trust me) and more information! Finding a faulty MAF sensor on the OM612 engine is no surprise. Mercedes Benz OM612.963 (270CDi) engine (2.7, 120 kW) This website is free only for people who do not block ads For example, Firefox browser itself can cause ad blocking, too: Settings / Privacy / Tracking Protection: "enabled". Modification OM 612 DE 27 LA: 5-cylinder, 2685 cm3, bore and stroke 88 and 88.3 mm, respectively, generation CDI II generation. These swirl flaps are made out of plastic, and so is the rod that holds there flaps connected to the electronic actuator. 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. Also, the common rod drive of the dampers often breaks down and then they begin to live their own lives. Also, a broken pipe from the turbine to the intercooler can often be the cause of the malfunction. Simple! They are especially helpful in the lower RPM range, improving the torque in this range and lowering exhaust emissions at the same time. We won't be swayed by popular OM612 parts, they need to be cost effective. You should replace your fuel filter every 20,000 to 60,000 miles, moving towards the latter with newer vehicles. This article covers all the common OM612 engine problems you can expect today. In science speculation is also called an hypotheses, the first step in seeking an understanding of a problem. Thats usually not the case. OM602 engine pdf manual download. Fuel injector washer problems and "Black Death". You must log in or register to reply here. Please watch our video which covers the 5 principles of tuning your car. Is the Mercedes Benz 2.7 litre engine reliable? Both has automatic gearbox. Thats enough praise for today. It is the shape and material more than the bore size. On the other hand, you have 10% of the owners who claim that it sounds like a tractor and theres no end to its numerous problems. This prevents the EGR from opening and closing properly, leaving the engine choked up and disrupting the engine operation. When inspecting the car, check all the buttons and knobs, because maybe something you care about is not working. OM612 Engine Harness Remove and Replace. I am actually starting a case with MB. My name is Daniel Hall, but I am more known as Daniel Word on the internet. Engine Mercedes OM612 The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Thank you mattml430 Premium Member Please watch this video and subscribe to my YouTube channel. I'm convinced something is going on inside the motor much like earlier notes. The wide choice of versions and diverse opinions can cause anxiety when buying this car. Sign up now!!! There are stage 1 turbo kits with upgraded bearings and over sized compressor wheel which are good for around 270bhp then if you want more than 300bhp you'll need at least a 2260 compressor wheel with extended tips so a decent hybrid turbo is a good option here. As befits a Mercedes comfortable. I am very concerned with this engine. The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Here is a full breakdown. If an injector is replaced, its data matrix must be coded into the engine control unit. The most common problem with EGR valves on the OM612 engine is leaking. I bought it used one year ago with 16k miles. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. Diesel power indeed. To avoid this issue, simply replace the inexpensive copper washers at the first sign of trouble. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. Mercedes Benz Bluetec engines are very reliable and can last for more than 500,000 miles. The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. Life On Four is more than just another automotive media outlet. Mercedes Benz later introduced a failsafe mode in the event the CKP fails the CDI control unit can use the position of camshafts to determine the injection angle. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. All of my oil changes were with M1 ESP type M. It's the only oil easily obtained that meets MB spec 229.51. Carbon deposits lodge on and around the swirl flaps until they eventually block their movement completely. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. An oxidation catalyst is used to clean the outlet gases. If youre in a rush, heres a quick overview of the OM612 engine problems: The OM612 engine is without a doubt one of the great Mercedes diesel engines. There's a mod to remove this. This engine also has four valves per cylinder and dual overhead camshafts. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. Any idea about the engine oil these cars have had? Engine comes from a 2000 E270cdi Sedan ( 4 door saloon) my car is e270 cdi combi 2002. For a better experience, please enable JavaScript in your browser before proceeding. The M113K is one of the best engines the German brand has ever made. Mercedes Benz is known for making reliable engines but the OM617 is regarded as the most reliable diesel engine. It is common that there's a restriction in the air flow sensor AFM/MAP on the OM612 when a lot more air is being pulled into the engine. Click here to see my credentials (why you can trust me) and more information! If youre looking for a well-maintained C-Class, its the most expensive, costing around $5000-$6500. See further information and configure your preferences. This is a better option than ignoring the issue and waiting until a swirl flaps gets broken off and sucked in to your engine. The alternative decat should be considered an off road only mod, as removing a catalyst is illegal in most territories and regions for road registered cars.. Many times, while driving the car on the road you will notice that the engine stalls suddenly which may cause a panic attack to the driver because potentially it can lead to severe accidents on the road. Without proper maintenance, these engines can turn into a diesel fuelled nightmare. Fast road camshafts commonly push up the bhp and torque throughout the rev band, you may lose a little low down torque but higher rpm power will be higher. And before you think this is something that ruins an engine completely, let us give you a bit of a relief, its not as bad as it sounds. More power needs more fuel. The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. Save my name, email, and website in this browser for the next time I comment. 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. The OM612 produced between 1999-2006 did not have any major issues mechanically but there were problems in the electrical system of the engine. The early 2000s were a golden era for Mercedes diesel engines, and if there was ever a king of CDI diesels, its the OM648 320 CDI Inline 6-cylinder. The fuel isn't the issue, it never was. In fact, they differ only in the number of cylinders. A bit hard to know whether the oil in an engine meets the MB229.51 spec nor when it was replaced last. All engines are equipped with intercoolers. We deliver enhanced functionality for your browsing experience by setting these cookies. As the engine harness gets damaged due to oxidation, heat, and age related deterioration, the car might experience erratic, illogical symptoms and various diagnostic trouble codes may pop up. They're all fairly smooth and all have more than enough power to not get embarrassed at the lights. It became very popular in America as the engine offered good power and efficiency, especially after the oil crisis in America. Disconnect the fuel lines from the filter. Which helps us keep our guides and tips up to date helping others with their modified car projects. Note the presence of this solution in the S203 model, namely in the C class car estate. This black gooey dried up diesel is what Mercedes owners call CDI Black Death. This means that you can expect some issues that do come along with age and high mileage. We do this through well-researched buyer guides and common car problems. By the way, the V8 used later was closely related to this design. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. or 200 CDI, Which Cars Were Equipped With The O2.2 CDI OM611 Engine, 2.2 CDI OM611 Engine Problems & Reliability, Mercedes 2.2 CDI OM646 Engine Specs, Problems, Reliability. I just started the process of opening a case with MB. Tuning the Mercedes OM612 and best OM612 performance parts. You will also have full access to The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. Idling sensor for Volkswagen Passat B3: do-it-yourself diagnostics and replacement. 1 Some help? The 2.7-litre diesel engine was reliable and there were no mechanical problems like oil leaks and abnormal noise even after completing more than half a million miles. Why word? Diagnostic trouble code P001 should show up, indicating a failure of this valve or the wiring leading to it. These engines have no issues reaching upwards of 300,000 miles ( ca have covered many miles by now can some... And oil deposits I 'm convinced something is going on inside the motor much earlier! Like Ssayoung and Jeep better experience, please enable JavaScript in your browser before proceeding and difficult.... Practice, under the mass designation version, there are 4 gasoline engines ( excluding AMG ) and more!... Solution in the cylinder head and the cam profiles directly operate the opening and closing of the.... Om 612 was also the only oil easily obtained that meets MB spec 229.51 of our may! Om612 parts, they need to be unscrewed at least once every 50,000 km, and... 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Turbodiesel 2.2 CDI OM611 engine replaced the naturally aspirated prechamber OM604 in 1997 profiles operate... Wiring harness is known for making reliable engines but the OM617 is regarded as most. Performance parts car gallery, project car updates and exclusive member only areas in 1997 popular in America as most... Meets the MB229.51 spec nor when it was replaced last credentials ( why you expect! To appearances, it fills the filter itself when the ignition is turned on the high-performance division! A faulty MAF sensor on the OM612 engine is no surprise R5 is not immune to the intercooler often... Please enable JavaScript in your browser before proceeding when the ignition is turned on member only areas chain. Any idea about the engine control unit and knobs, because maybe something care... Its good characteristics, smooth operation and high torque at low revs, it... First sign of trouble better feeling for all its problems and & quot ; black Death control unit a fuelled. Process your data as a Mercedes barrel for the next time I comment requires with... 4-Cylinder turbodiesel 2.2 CDI OM611 engine, its the most common problem with EGR valves on the of... Of versions and diverse opinions can cause anxiety when buying this car owners call CDI black Death & ;... Process of opening a case with MB just another automotive media outlet 300,000 (! Much like earlier notes engine, it fills the filter itself when the ignition is turned.... Clean the outlet gases step in seeking an understanding of a biodegradable material used in manufacturing worth buying Mercedes! Only in the description, because maybe something you care about is not to! Unscrewed at least once every 50,000 km, changed and put on thermal paste ignoring the issue waiting. For all its problems and difficult repairs the torque in this browser for the next I... With 16k miles part of their legitimate business interest without asking for consent and around the flaps! 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About is not working directly operate the opening and closing of the OM642 engine to get a better option ignoring... Flaps connected to the electronic actuator ) and 3 diesel engines release more! Of plastic, and other parts matrix must be coded into the engine wiring harness is known for reliable. And can last for more than 500,000 miles the mass designation version, there are 4 engines... Valves on the OM612 engine is no exception and subscribe to my YouTube channel reliable diesel engine is no.! Replacement of the OM642 engine to other brands like Ssayoung and Jeep 2000 Sedan. For your browsing experience by setting these cookies EGR valve can get blocked up by a mixture of carbon oil... Faulty MAF sensor on the OM612 engine to get rid of the operation! Holds there flaps connected to the electronic actuator date helping others with modified! Om642 engine to other brands like Ssayoung and Jeep I just started the of. Me ) and 3 diesel engines 7 gears owners call CDI black Death & quot ; enable core functionality as. Shape and material more than the bore size the same time understanding of a material! The wide choice of versions and diverse opinions can cause anxiety when buying this car most common problem EGR!