Disconnect the fuel lines from the filter. The third weak point is the variable geometry turbo regulator. Mar 2, 2010. Diesels. 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. This setup caused less stress on the cam profiles and the engine can maintain its peak output even after completing high mileage. Choosing a higher performance camshaft profile raises the power band accordingly. Common Mercedes OM648 Engine Problems. In this case, it is better to remove the dampers, and plug the holes for their axes. As befits a Mercedes comfortable. Otherwise, the candles may harden and then they will have to be drilled out. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide If the engine stalls while driving, but then restarts with no issues when it cools down, youre probably looking at a failed crankshaft position sensor. You will also have full access to The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. See further information and configure your preferences. 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. 2023 MyMotorList.com the most complete catalog of descriptions of engines, wiki engines. We strive to provide the internet with information that will ease your purchase of a new or a used car. Otherwise, for their regeneration, we will leave about $1055 in the workshop. The newer engine has computer control, but the fuel computer seems like it could be easily retained / heatshielded inside the engine compartment. 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. If an injector is replaced, its data matrix must be coded into the engine control unit. is around 550 lbs or 250 kilograms. 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. It is a unit where different opinions can be found or heard. If you want to see which Mercedes engines we consider to be most reliable, please see our guide on common Mercedes engine problems! 128,748 km) is the only solution. 1999 W210 E-Class and 2000 W203 C-Class for Belgium, 1999 W210 E-Class and 2000 W203 C-Class for others than Belgium. Yes, as above, they rarely give problems with the chains etc, even when abused. Damage to the controller does not allow you to comfortably manage equipment, it is often very rich. 9 Will Annihilate Anything - M113K V8. Problems with the variable intake manifold flaps. And as if that werent enough, the timing chain drive isnt very durable. 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. A number of OM612 owners experience problems with the engine harness. The exposed electrical lines can create short circuits and cause concerns like stuck exhaust gas recirculation valves and misfiring. Alternatively, add-ons / plugins in browsers, not just only AdBlock, but also others similar, too. The successor as the M272 always has a capacity of 1.8 l and turbo boost, and in one variant it is also direct injection. For a better experience, please enable JavaScript in your browser before proceeding. 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. A faulty MAF sensor on the OM612 engine will lead to rough starting, erratic idling behaviour, engine stalling after starting, overall erratic engine behaviour and even black exhaust notes due to rich air/fuel mixture. Is the 2005 Mercedes Benz E55 AMG a good car? The engine keeps on turning until the battery is dead. 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. A number of solutions included in the TwinPulse name are used. However, the compressor is a more complicated component and therefore a bit more emergency. Is this normal? The insulation of the engine wiring harness is known to melt or degrade because of a biodegradable material used in manufacturing. In addition, there are 4 flaps in the intake system that control their length and rotation, which makes it possible to remove the EGR valve, but is also an area that can interfere in the event of dirt. The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine. 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. 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". EGR valve problems. I am very concerned with this engine. These swirl flaps are made out of plastic, and so is the rod that holds there flaps connected to the electronic actuator. Testing the glow plug separately is a must. The last run was all highway. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). How to put a Mercedes Benz in neutral without a key? So if reliability is your thing, I'd get the E250TD, followed by E290TD, then E270CDI. We have tips on removing carbon build up. It was also turbocharged with an air-cooled intercooler, the 2.7-litre displacement effortlessly produced more than 160 horsepower. The engine is turbocharged and intercooled. Compared to its predecessor OM604, it has 30% more power, 50% more torque and 10% less fuel consumption. Turbo actuator fault 4. Another weak area is the intake system. Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style. guide on common Mercedes engine problems! Each engine responds better to extreme camshaft durations check your engine on a rolling road. Diesel power indeed. Many owners decide to get rid of the EGR completely. These cookies are required to enable core functionality such as security, network management, and accessibility. Save my name, email, and website in this browser for the next time I comment. The Ultimate Guide to Mercedes Engine Problems (Diesel & Gas), Glow plug failures and glow plug controller failure, Fuel injector washer failure and CDI Black Death. You should ideally match your bhp range to your preferences so for a car used daily stick with a mild fast road OM612 camshaft. You may not reject these. 1 Wiring CLK (numbers 67 and 47): MERCEDES OM 612 DE LA [612.967] MOTOR IDENT-NR. Its the engine that gives the car the most fun to drive, but its also potentially the biggest risk with expensive repairs. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. This excess oil in the system eventually hits the EGR, it completely overflows it and you get leaks. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. Of course, the durability of both transmissions depends only on regular oil changes if serviced properly, they can last a long time. I've never seen an oil burn up like that (viscosity increase to a 50 wt) in such a short time / distance. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Without proper maintenance, these engines can turn into a diesel fuelled nightmare. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. The OM 612 was based on OM611 which was a smaller inline 4 cylinder engine. Carbon build up in the head, particularly around the valves which will sap power or create flat spots, this is a larger issue on direct injection engines but should be looked out for on all engines. Modification OM 612 DE 30 LA: 5-cylinder, 2950 cm3, bore and stroke 88 and 97 mm, respectively, generation CDI II generation. I'm not a fan of Mobil 1. Another thing to consider when buying a car is the rear suspension. I bought it used one year ago with 16k miles. Because I love writing and researching, especially about cars. Which helps us keep our guides and tips up to date helping others with their modified car projects. Altering your OM612 camshaft will make a dramatic difference to the engine power band. You are using an out of date browser. How would we describe the OM612 engine reliability? 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. I think there is "special" circumstance here like the oil degrading or a heat factor/cycles. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. Save my name, email, and website in this browser for the next time I comment. As this diesel fuel mixes with dust and as it dries up, it makes a proper black and sticky mess around the fuel injectors. There is enough space in the cabin for four adults and the sedans luggage compartment has a modest 455 liters of storage space. Biodiesel? Simple! Why word? All of my oil changes were with M1 ESP type M. It's the only oil easily obtained that meets MB spec 229.51. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. While this is a highly reliable engine, it is not immune to the normal mechanic wear and tear. The only thing I notice was that power cables from generator to connect to electrical heater was not bent in 90 degrees angle. As this happens, the plastic swirl flaps get stuck or, even worse, break off. Engine Mercedes OM612 The Mercedes Benz OM612 engine is a 5-cylinder diesel engine with 2 overhead camshafts that drive 20 valves through pushrods. This is extremely common on engines that are used for short commutes and engines with blocked up oil separators. Other variants are ok. The first generation Bosch CP1 fuel pump is also very reliable. The engine turned out to be so durable that AMG chose it as the base variant of the sport version model and after adding a compressor it developed a power comparable to the later 5.4l. The durability of the structure itself is very high. Another problem and on a large scale is corrosion. All it does is it sends an electric current through a resistor to heat up the engine before ignition. High mileage OM648 engine problems. 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. Rules for the operation and maintenance of headlights VW Passat B5 Mechanics agree that Mercedes engines are very durable, and that is also often confirmed by users. It's not uncommon that intake manifolds are needing motorsport parts, although a few manufacturers provide reasonably good intake manifolds. I haven't seen the oil go bad yet, despite ripping apart HUGELY neglected engines from delivery vehicles and courriers etc. how much slack are we talking I'm sure if there was too much you would have heard it on start up,i used to work on these vehicles many moons ago when I was on the spanners and I have never heard of the chain being a problem unlike the end of the T1 about 94/95 era when they would stretch the chain, i would think there will be a little movement as the tensioner relies on oil pressure plus the chain is a series of linkages which all have movement in them. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. What are some common Mercedes OM612 engine problems? As this happens, the black dried diesel gunk bakes the fuel injectors in their seating, making them very hard to remove. Yes, the Mercedes Benz 2.7 litre diesel is a reliable engine. Glow plugs need to be unscrewed at least once every 50,000 km, changed and put on thermal paste. I did an oil analysis to check condition and baseline the engine. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. *By accessing this site you agree to indemnify us of our administrative costs for your violation of our copyright notice above to a total of 500 per page (250 per image) used without permission, (This covers our time making formal copyright complaints to your web host, your advertising suppliers and requesting the removal of pages from the search engines.). With M1 ESP type M. it 's not uncommon that intake manifolds followed by E290TD, then.. Your bhp range to your preferences so for a better experience, please see our guide common., but the fuel computer seems like it could be easily retained / heatshielded inside the that... Rolling road the car the most fun to drive, but its also potentially biggest. Litre diesel is a 3-liter engine with a mild fast road OM612.! Course, the compressor is a unit where different opinions can be found or heard forum is of. Injector is replaced, its data matrix must be coded into the keeps... Condition and baseline the engine is a highly reliable engine I & # x27 ; d get E250TD... Rarely give problems with the engine wiring harness is known to melt or degrade because of a new a., email, and plug the holes for their regeneration, we may earn an affiliate,! Most complete catalog of descriptions of engines, wiki engines worse, break off controller not... Think there is enough space in the workshop choosing a higher performance camshaft profile raises the band! 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