The majority of these cars have covered many miles by now. All content is subject to copyright protection - LifeOnFour 2023, Fuel injector washer problems and Black Death, Problems with the variable intake manifold flaps. An engine harness is a set of wires, connectors, and cables that connect all the electronic components of the engine with the cars ECU and other electronic components. If youre looking for something more powerful, its better to go for the M112 variant, say 170 HP, rather than the comparable 4 cylinder compressor. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. 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. You should ideally match your bhp range to your preferences so for a car used daily stick with a mild fast road OM612 camshaft. 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. Just like the OM646 engine or the V6 OM642 engine, the OM612 experiences problems with the swirl flaps inside the intake manifold. The wide choice of versions and diverse opinions can cause anxiety when buying this car. They should be changed every 60,000 km, along with the replacement of the injector mounting bolts. Or maybe the owners are subjecting them to severe service (always cold running engine at heavy load) and the oil is polluted too much with diesel and has a reaction. Thats usually not the case. Life On Four is more than just another automotive media outlet. Short journeys can quickly coke up these engines, which leads to carbon build up in the intake manifold and all over these plastic swirl flaps. This is a better option than ignoring the issue and waiting until a swirl flaps gets broken off and sucked in to your engine. Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. List of Mercedes-Benz engines; List of engines used in Chrysler products In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. 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. This article uses bare URLs, which are uninformative and vulnerable to link rot. These tiny plastic components become brittle as these cars age, meaning its not uncommon for them to break and get stuck in a certain position. "All you need to know about performance tuning the Mercedes OM612 engine!". The biggest problem was the broken injection system, and here a new piezoelectric injector was used, which wasnt very cheap anymore. Your email address will not be published. Its also not easy to repair, though it costs a lot like a turbo at around $250. Mercedes Benz is known for making reliable engines but the OM617 is regarded as the most reliable diesel engine. Engine Mercedes OM612 The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Each rear wheel is guided by four elements. Simple! The position of the crankshaft is very important to determine the injection timing and quantity. 5-Cylinder Diesel Engine, 6-Cylinder Diesel Engine. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). They are all sold as a single kit. Double declutch The new compact cast iron cylinder block was developed specially for this engine. The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. 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. 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. If you reject them, enhanced functionality will be unavailable. For its powerplant, Affalterbach took the C270 CDI's OM612 inline-five engine - a motor also used for the . It may not display this or other websites correctly. Save my name, email, and website in this browser for the next time I comment. They also increase the scavenging effect of the engine. As a rule of thumb add another 20% when specifying an injector, this allows for injector deterioration and affords you some spare capacity should the engine need more fuel. On most factory exhausts you should find that the flow rate is still good even on modest power gains, but when you start pushing up the power levels you will need to get a better flowing exhaust. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. Your email address will not be published. Kelley Blue Book identifies engine diagnostics and oil changes as among the most common areas for service. Has anyone having the same issues or know the cause only thing i can say is they do seem to have poor service history is this the reason,please any help in the matter would be extremely helpful as we do feel sadden for the customers who have to pay these heavy repair bills thanks to all im sure you all have the same concerns as me. Both do a good job of recirculating the exhaust gasses back to the intake manifold and lastly the combustion chamber. JavaScript is disabled. The older M112 engine was then a novelty in Mercedes offering, as it had a V6 configuration, unlike the previous R6. Mercedes Benz diesel engines are very reliable. It became very popular in America as the engine offered good power and efficiency, especially after the oil crisis in America. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. Heres more about the actual engine. The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. 1. Can a Mercedes Benz last for 100k kilometres? The main change is the addition of variable valve timing, which results in greater complications in timing drives, shorter component life and therefore the need for more frequent intervention. Another problem is carbon deposits. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. In this article I will not discuss it, although from a technical point of view it is the same. 9 Will Annihilate Anything - M113K V8. 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. Mileage (although oil should not behave like that on high mileage cars only)? Is the Mercedes Benz 2.7 litre engine reliable? Twin scroll turbochargers divert the exhaust gases into a couple of channels and flow these at differently angled vanes in the turbo. It also has the same problem with oil leakage as the M111. I would prefer to hear the engine at a cold start, after being stood over night. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The working quality of the engine is affected by the oil which should have a fairly low viscosity (even 0W30), while many engines work on semi-synthetics, because this is the trust of mechanics and users. there is no electrical connection to much or to little and all has fitted well. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. Any thoughts? Less risky in the petrol version than in the W204 successor. When you improve the power you will need to uprate to the fuel delivery. The swirl flaps are meant to improve the mixing of air and fuel at low speeds and thus improve the engine operation and performance at low RPM. I am very concerned with this engine. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. This is a great machine for long distance driving and for cooperating with LPG. The Mercedes W203 is one model that is offered in a wide variety of engines, from small and economical units to large V6 engines both petrol and diesel. Don't go with the largest exhaust you can source you'll reduce the exhaust flow rate - the best for power gains are usually between 1.5 to 2.5 inches. Life On Four is more than just another automotive media outlet. The Mercedes OM612 have loads of potential and with the ultimate sports mods like remapping, turbo improvements and camshafts you will substantially maximize your driving enjoyment. The engine doesnt handle short distances well, especially in winter, when its not heated properly. The difference cuts in at motorway speeds where the mid range punch starts to show. I saw high iron, but attributed it to wear in on a new engine. If you're in a rush, here's a quick overview of the OM612 engine problems: Intake manifold swirl flaps problems Fuel injector washer leaks ("CDI Black Death") EGR valve problems Mass Air Flow sensor malfunctions Engine oil leaks Engine harness damage On the other hand, I recommend the 3 liter variant only for the brave, even if the engine mileage is low. While the normal M113 was designed by Mercedes-Benz, the M113K is a modified version tuned by AMG and was the last Mercedes engine AMG used before switching to their in-house powerplants. Sure they throw rods when run out of oil, but no sludge. Increasing the OM612 valve size, doing some port work and head flowing will also improve torque, & importantly will permit an improved torque increase on other parts. The fuel line replacement kit from Europarts-SD comes with 5 lines - 3 clear and 2 black hoses. Use of this site: Please treat the information on this site as purely speculative and note that we accept no responsibility for damage or loss incurred due to following a recommendation made on this site, our videos or in the forum. By using a variable nozzle turbocharger, this unit produces 150 kW or 201 horsepower at 4200 RPM with 500 Nm or 369 lb ft of torque. Be sure to keep up with our latest YouTube content and subscribe. Without proper maintenance, these engines can turn into a diesel fuelled nightmare. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. Read more here! Many owners unknowingly did not change the refractory washers under the nozzles. Click here to see my credentials (why you can trust me) and more information! The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). OM612 Engine Harness Remove and Replace. I'm convinced something is going on inside the motor much like earlier notes. The 2.7 L / 3.0 L 270 CDI engine, also known by its factory name the OM612, is a 5-cylinder diesel engine made by Mercedes-Benz from 1999 to 2006. What he does not hear from the owner of the problem engines, is the truth about how the engine has been maintained. Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style. 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. Yes, the Mercedes Benz 2.7 litre diesel is a reliable engine. The company has been making diesel engines for more than 50 years and uses the latest common rail diesel injection technology and regulated oil pumps to lubricate the moving parts. Yes, the OM648 inline 6-cylinder engine is amongst the most reliable Mercedes diesel engines ever produces. That seems to be steady trend for years and M1 doesn't worry about it, nor MB USA. The first generation Bosch CP1 fuel pump is also very reliable. Required fields are marked *. OM612 5 cylinder 2.7L engine into this: 190D 2.5 turbo? A Race camshaft will just annoy you whilst on the daily commute, because the lumpy idle will make the car prone to stall and smooth driving at low rpm becomes impossible. A faulty crankshaft position sensor cannot send the correct sensor and the CDI control unit does not start the engine. It helps reduce hydraulic loss, and engine load, operates only on demand, etc. Bio Diesel contains some glycerides (waste veggie oil contains much more glycerides) and over time without proper oil changes these will build up in the engine oil and congeal, turning to jelly at cold temperatures. Electronics has become a very troublesome area. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. Electronic component failure doesn't really matter, although it can irritate the driver. We have this feature on twinchargers if you want to read more. What are the common problems in the 2.7 litre Mercedes Benz diesel engine? These swirl flaps are made out of plastic, and so is the rod that holds there flaps connected to the electronic actuator. 1999 W210 E-Class and 2000 W203 C-Class for Belgium, 1999 W210 E-Class and 2000 W203 C-Class for others than Belgium. As long as everything works perfectly in the cooling and lubrication system. Which is better, the newer V6 OM642 engine or the older l6 OM648 engine? High mileage OM648 engine problems. It is your responsibility to check and verify any tip advice or other articles content with a qualified mechanic before undertaking work or following instructions. The OM648 is a 3.2 Litre, straight or inline 6-cylinder engines with 4 valves per cylinder. By the way, the quality of the car improved significantly, but more on that later. What are the common problems in the 2.7 litres OM 612 Mercedes Benz diesel engine? Mercedes Benz OM 612 was even capable of running on biodiesel or vegetable oil without any major modifications. We have tips on removing carbon build up. 10 Used Cars That Will Appreciating in Value, 2024 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). LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. This entry was MBClub UK is in no way affiliated with Mercedes-Benz, DaimlerChrysler or any of their respective trademarks. Please see terms for details. This code is stored in the engine control unit which can modulate the injection duration according to the manufacturing tolerance of the individual injectors. The direct fuel injectors are connected to this rail via high-pressure fuel lines. Which models used the 2.7 litre Mercedes Benz diesel engine? Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). I am concerned with MB blowing this off. The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. Otherwise, the candles may harden and then they will have to be drilled out. I am actually starting a case with MB. 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. Testing the glow plug separately is a must. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. The Ultimate Guide to Mercedes Engine Problems (Diesel & Gas), Fuel injector washer leaks (CDI Black Death). The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. The fuel isn't the issue, it never was. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. Their pistons are exactly the same. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. In this case, it is better to remove the dampers, and plug the holes for their axes. Still, that's 1.25 BILLION dollars in repairs. The third weak point is the variable geometry turbo regulator. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. Customize a car This is extremely common on engines that are used for short commutes and engines with blocked up oil separators. However, they can harden, jam, and the holes under their axles are broken, due to which soot and oil from the intake seeps out. It is the main goal to any engine performance tuning job to force more air and fuel into your OM612. Few problems should happen as long as they are regularly serviced and maintained. There is also a coupe-style body called the Sportcoupe. The trusty OM648 is no different. This excess oil in the system eventually hits the EGR, it completely overflows it and you get leaks. 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. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. In addition to the described areas, it is worth paying attention to the drive system. I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. Most 2.2 CDI OM611 Engine management faults are perfectly diagnosed by a proprietary Mercedes scanner. The reason for this malfunction is seen as insufficient performance of the oil pump against the background of a high load on the crankshaft, especially when constantly driving in tightness in high gears on a loaded minibus. Altering your OM612 camshaft will make a dramatic difference to the engine power band. The timing chain is very sensitive to it, and under such conditions it is worth replacing even every 80,000-120,000 km. Operates only on demand, etc common areas for service lastly the combustion chamber injection. Off and sucked in to your engine of these cars have covered many miles by now generation Bosch CP1 pump. The candles may harden and then they will have to be drilled out life on Four is more than another. Speeds where the mid range punch starts to show power and efficiency, especially in,! Through pushrods crankshaft is very sensitive to it, although from a point! Proper maintenance, these engines can turn into a couple of channels and flow these differently. 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