Tips for N54 Tuning The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. 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. Lets first do a favour to all of you that are in a rush. Whats wrong with the Mercedes C-Class (W203)? The OM612 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. 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. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. the company used the OM 612 in the following models. 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. Customize a car Moreover, many mechanical damages are causing engine stalling issues in your Mercedes, so it is always advisable to diagnose the mechanical problems and fix them earlier. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Motorsport camshafts, push up the higher rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. Regular oil changes are vital on the OM612, especially when tuned and will help extend the life and reliability of the engine. Which Mercedes Cars Have the OM612 Engine? 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. I'm not a fan of Mobil 1. Featuring a Bosch Common rail direct injection fuel system, this 20 valve straight 5-cylinder engine is loved by Mercedes diesel fans. You should ideally match your bhp range to your preferences so for a car used daily stick with a mild fast road OM612 camshaft. Another problem and on a large scale is corrosion. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. The second diesel engine is a 5-cylinder, 2.7 liter cult engine (OM612). If you reject them, enhanced functionality will be unavailable. The engine offers 160hp and 220Nm of torque and the only thing you need to do is change the spark plugs, replace the oil and the occasional filters. This engine continued the modular tradition. 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. 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. MERCEDES OM 612 DE LA [612.963] MOTOR IDENT-NR. We use essential cookies to make this site work, and optional cookies to enhance your experience. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. It now has 40k miles. feature on twinchargers if you want to read more. 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. The 2.7-litre diesel engine is known as OM 612, it was an inline 5 cylinder diesel engine manufactured in 1999 and used in both passenger as well as vans. Read more here! Thats enough praise for today. Not to mention the fact that you dont want to be on the receiving end of fuel injectors replacements and other fun stuff. My name is Daniel Hall, but I am more known as Daniel Word on the internet. Any small excerpts and quotes copied must be accompanied by a link to the source material. The biggest advantage of the 2.1L engine is its popularity. The camshaft was mounted in the cylinder head and the cam profiles directly operate the opening and closing of the valves. 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. Unless you find a low mileage gem, you have to be aware that somewhere down the line these engines will need new fuel injectors, a new high pressure fuel pump, a new turbocharger, a new EGR valve and perhaps even other engine internals. What are the common problems in the 2.7 litres OM 612 Mercedes Benz diesel engine? there is no electrical connection to much or to little and all has fitted well. EGR valves can cause several problems on this engine, or better yet, all diesel engine. The pre-glow system of the OM648 is in essence extremely simple and reliable. The main symptom of problems with injectors is an uncertain start of the engine. Another weak area is the intake system. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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. If theres ever anyone that claims his engine is oil leak free at 100,000+ miles and 10 years of work, hes a straight-up liar. In this article, we find out if the Mercedes Benz 2.7 litre diesel engine is reliable? I am very concerned with this engine. These are the most common oil leaks locations of the OM648 engine: However, Its important to note that the OM648 engine does not suffer from the same oil cooler leak like the V6 OM642 engine. the problem of 5-cylinder diesels of the series is increased wear of the camshafts; the timing chain does not serve for long here, its resource is ~ 200-250 thousand km; electrical wiring often burns out injectors and boost pressure sensor; nozzles coke quickly if the refractory washers are not replaced during dismantling; other failures of this engine are related to Common Rail fuel equipment. 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. Save my name, email, and website in this browser for the next time I comment. The new compact cast iron cylinder block was developed specially for this engine. Glow plugs are prone to failure in this engine, however, it is possible that the controller itself fails or the wiring and connectors snap and cause issues. Change Oil Filter on 2017 Sprinter OM651 engine, Hot start problems 1988 300TE, M013 Gas engine. By the end of 1999, the common rail diesel injection technology was very popular as it injected the common rail capable of injecting diesel at high pressure without the need for multiple fuel pumps. You dont want to experience that, trust us. Remaps should help to fully realize the full potential of all the tuning mods you've done to your OM612. Turn on the engine and inspect the filter for any leaks. Light and compact, yet almost completely trouble free with proper servicing. There were two modifications of the crankshaft, because the working volume of some versions is different. The engine keeps on turning until the battery is dead. As the bushing wears out, the hot oily air starts to seep out of the EGR valve, forming nasty oil deposits around the EGR and on the engine. It is a unit where different opinions can be found or heard. And as if that werent enough, the timing chain drive isnt very durable. Their pistons are exactly the same. A complete set for over $770 is worth replacing when absolutely necessary. If you continue to use this site we will assume that you are happy with it. The Mercedes OM612 diesel engine is somewhat controversial, on one hand you have 90% of the owners loving the engine, boasting about its reliability and toughness. Thats usually not the case. NA (naturally aspirated) engines need quite a lot of work when you add a turbo, so we have a separate guide to help you take into account the pros and cons of going this route on your OM612. They also increase the scavenging effect of the engine. OM602 engine pdf manual download. JavaScript is disabled. Just two things will kill it! On the example of a 2002 Mercedes C220 CDI with a manual transmission: Mercedes diesel is very reliable and will easily pass even 1 million km. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. 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. A lousy batch apparently. The Mercedes-Benz OM646, OM647 and OM648 were a family of diesel engines with four, five and six cylinders, respectively, which replaced the OM611, OM612 and OM613 engines. All engines are equipped with intercoolers. The Fora platform includes forum software by XenForo. Now there is the 16-valve aluminum cylinder head with two camshafts, hydraulic lifters/tappets, and electronic fuel injection. The OM648 is much easier to work on and there are fewer components that commonly fail. 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. 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. Well now you are posting things of a wider picture. is around 550 lbs or 250 kilograms. I bought it used one year ago with 16k miles. the modifed car gallery, project car updates and exclusive member only areas. Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. Less risky in the petrol version than in the W204 successor. I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. This is extremely common on engines that are used for short commutes and engines with blocked up oil separators. 2023 MyMotorList.com the most complete catalog of descriptions of engines, wiki engines. Page may contain affiliate links. 482,803 km) or more if maintained properly. Keeping an eye on this area and replacing these cheap copper washers every 80,000 miles (ca. While they may sound good, theyre almost always perceived as a nuisance. 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. We use cookies to ensure that we give you the best experience on our website. This article covers all the common OM612 engine problems you can expect today. 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. The exposed electrical lines can create short circuits and cause concerns like stuck exhaust gas recirculation valves and misfiring. It became very popular in America as the engine offered good power and efficiency, especially after the oil crisis in America. It was also turbocharged with an air-cooled intercooler, the 2.7-litre displacement effortlessly produced more than 160 horsepower. Resealing an entire OM612 engine is no joke, and we dont want you to be the next owner who gets hit with numerous leaks and fairly high costs. It is one of the most costly upgrades but provides the best gains. Diesels. What are the common problems in the 2.7 litre Mercedes Benz diesel engine? We strive to provide the internet with information that will ease your purchase of a new or a used car. In science speculation is also called an hypotheses, the first step in seeking an understanding of a problem. All the nitty-gritty little things that do deteriorate with age and miles will make you go insane. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. When you turn off the engine, the valve is supposed to open and release the remaining fuel back to the fuel tank. The majority of these cars have covered many miles by now. Here is a full breakdown. Any thoughts? Replace your fuel pump's fuse in the fuse box. Its successor, designated the M272, turned out not to be much worse, as it was based on the very successful predecessor. Which helps us keep our guides and tips up to date helping others with their modified car projects. Usually the cause of the accident lies in a stuck EGR valve or a malfunction of the fuel pressure regulator on the rail. The posted views of our members are in no way the views of MBClub.co.uk or its owners. 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 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. The M113K is one of the best engines the German brand has ever made. 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. Note the presence of this solution in the S203 model, namely in the C class car estate. High mileage OM648 engine problems. It also has the same problem with oil leakage as the M111. Fuel injector washer problems and "Black Death". To keep us running PLEASE Donate here. The 2.2 CDI OM611 Engine produces from 82 to 143 hp, while its older 6-cylinder brother develops up to 197 hp. The fuel injectors are calibrated at the time of production and the data is stored in the form of an IMA code. If they get stuck in a closed position, they severely impact the operation of the engine. In practice, two seats with a small luggage capacity of 310 liters. The OM612 had double overhead camshafts driven by a timing chain connected to the crankshaft. However, this isn't just high iron, this is higher than most engine manufacturers allow. MPG calculator The OM 612 was also the only diesel engine modified by the high-performance AMG division. This is only applicable to OM612 engines. I especially recommend this option for the more powerful and larger versions of the 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. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. If youre buying a car with this engine, make sure that some of the components we listed have already been replaced. 1 Some help? ..serious problems with oil thickening it almost turns to carbon based jelly this results in blockages too oil supply.. only thing i can say is they do seem to have poor service history. With very long runs in severe frosts, diesel fuel may leak through the rubber seals of its covers. Finding a faulty MAF sensor on the OM612 engine is no surprise.

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