Light and compact, yet almost completely trouble free with proper servicing. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. OM646.981, OM646.982, OM646.983, OM646.984, OM646.985, OM646.986, MBMANUALS.COM Website Content Copyright Protected, Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals, 110 kW (150 PS; 148 hp) @ 3,800-4,200 rpm, Manuals may be used as reference for other vehicles with OM646 Other modifications were later introduced. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Shopping for a Mercedes-Benz? Join our forum today and benefit from over 300,000 posts on tuning The compression ratio of the diesel engine was lowered from 18.0 to 17.5. Which helps us keep our guides and tips up to date helping others with their modified car projects. 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. The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. 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. In fact, they differ only in the number of cylinders. . Read Also:Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. 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 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. A more modern version of the 2.1 liter diesel is chosen by the driver. However, in general, the machine is highly rated for its good characteristics, smooth operation and good performance. If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. In practice, two seats with a small luggage capacity of 310 liters. At an auto store, the same part can be purchased for $ 40. New replacement costs at least $ 405. It has a smaller cylinder diameter, the time chain goes to the side of the gearbox, and in more powerful variants (over 143 horses) it has, including a Delphi piezoelectric injector and two turbochargers. More than 300,000 vehicles appear on the website. Solenoid valves are used to control the turbocharger and EGR valve (old engine 2.1). There are also modifications of BlueTEC and BlueEFFICIENCY. Jan 27, 2017. Their strength, however, is simplicity and lack of effort. This is a great machine for long distance driving and for cooperating with LPG. 1.8-liter M271 I4 engine - M271.860, M271.861, M271.862, M271.820, M271.860. Independent repair shops may quote head removal or butcher it up. 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 OM646. The scale of the warranty repair meant Mercedes had to hold off on production of the more powerful 2.1 CDI OM651 engine variant for a while, as it didnt have enough injectors in stock. Longer valve durations can alter the torque 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. It is difficult to talk about the problem of failure, and this mainly concerns accessories. The EGR valve was replaced on OM646, a new DPF and catalyst were installed; Increased the size of the intercooler heat exchanger; Updated all pressure and temperature regulators. - Valves in the intake manifold. Plenty of these engines made it to 200,000 miles (ca. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. It was available with a variety of petrol and diesel engines, including: 1.6-liter M274 I4 engine; 1.8-liter M271 I4 engine; 2.1-liter OM646 diesel I4 engine; 2.1-liter OM651 diesel I4 engine; 2.5-liter M272 V6 engine; 3.0-liter M272 V6 engine; 3.5-liter M276 V6 . Advantages Availability. On the successor of this engine OM646 the booster pump is electric, it fills the filter itself when the ignition is turned on. We use cookies to ensure that we give you the best experience on our website. Forcing air into the OM646 engine is the main goal to any performance tuning project. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. The pulley alternator in + can often fail. It features a reduced compression ratio of 17.5:1, a new turbocharger, The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . Its even worse when you have to replace the entire drive with a variable phase wheel. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. motors, Lanchester balancer (to compensate for free inertial forces), Crankcase ventilation system with electrical heating element, Engine control unit with CAN gateway function, CDI-D common rail diesel injection (Delphi), Maximum peak pressure in the combustion chamber up to 165 Unfortunately, suffers from oil spills and leaks. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. W204 Engine Codes. Low Power? A known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. Wiping on the liner leads to knocking, stopping idling. Advantages Costs. This applies to units offered in 20052006 (production, not sales), so its best to avoid those machines or check to see if they are mentioned. Modified car insurance Work out your MPG The water pump and circulatory system around the fuel filter can drain fluid. Germany focuses on power, work culture and economy. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]. Also, the cylinder head camshaft drive often wears out. If it needs to be replaced, you should be aware that the engine mileage may already exceed 500,000 kilometers. Issues by Complectations or Trim Levels 3.1. Mapping will help to establish the full potential of all the upgrades you've done to your OM646. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. Bosch electromagnetic devices can be repaired for 80-108 dollars. Some sources report that the shortage affected about 300 cars. Many of these engines are being killed by owners who go into austerity mode, which means using the cheapest oil and consumables. Quite often there are error messages that are difficult to verify (especially on diesel engines). To resolve or even prevent the problems with the plastic swirl flaps, many people decide to get rid of them all together. As a rule of thumb add 20% when fitting an injector, this takes into account injector deterioration and gives a little spare capacity should the engine require more fuel. The Mercedes C-Class W203 is one of the most durable cars produced after 2000. Design. The 2.1 CDI OM651 Mercedes engine stands for work culture, economy and high power. The more powerful version of the engine uses piezo injectors Delphi. The 2.1 CDI engine marked OM 651 debuted in 2008. Why word? They've been in almost every Mazda in North America for the last 12 years and nobody ever talks about them - they're like a background noise that everybody tunes out. The OM646 engine is incredibly reliable. Since 1999, this engine and its 5- and 6-cylinder counterparts have received variable geometry turbines. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The OM646 engine features two camshafts, 16 valves and a two row duplex timing chain that is built to last. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. Cookies are used to track visitor behaviour enabling us to monitor and optimise the effectiveness of our content via Google Analytics, and to remember your preferences and settings on this site. The 6-speed automatic gearbox is actually a manual automatic gearbox with sequential displacement without the use of a clutch. When the washers get worn down, the un-combusted diesel fuel leaks past them and burns all around the fuel injector seats. Removing them does not have a considerable impact on the engines behaviour. If you continue to use this site we will assume that you are happy with it. Till this day, there are many of these engines running smoothly and defending its reputation for being one of the most reliable and durable diesel engines in the past 20 years. Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. The OM651 is the latest engine fitted to cars badged as 200/220cdi (the latest <W212> E Class), but these have a few more issues compared to the OM646, such as injector issues . Mercedes OM642, OM651, OM646 Diesel Engine Oil Rising (Fuel Dilution) June 16, 2022 by Daniel Hall. Proceed to testing low side system pressure. Thank you very much. Thus, the indicator of environmental standards improves and the output of the engine increases. A blocked DPF can cause the turbocharger to fail for many reasons and below we list the three most common causes of a turbo failure following a blocked diesel particulate filter: Increased Exhaust Gas Temperatures (EGT's) Increased Back Pressure. GASKET CYLINDER HEAD FOR MERCEDES-BENZ OM646.821/811/820/812/701 2.1L 4cyl. Check crankshaft bearings for alignment. We use cookies to ensure that we give you the best experience on our website. Tuning the Mercedes OM646 and best OM646 performance parts. Engines & Engine Parts; Gaskets, Seals & Hardware; Gaskets & Seals; GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L; See Details on Ebay GASKET SET CYLINDER HEAD COVER FOR MERCEDES-BENZ OM646.821/811/820/812 2.1L. The compression ratio is reduced to 16.2: 1. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). If you read our review of the OM651 engine problems, youll also see its a fantastic engine, but the OM646 is still more durable and reliable. ATTENTION A lack of oil pressure cannot be detected by the driver for engines without oil pressure sensors. However, I dont think its worth buying this model for as low as $1500-$2500. Another weak area is the intake system. On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. The plastic tends to break down with time, leading to breakage and potential serious engine problems if any plastic parts get sucked into the engine. Mercedes dealers have the . 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. Life On Four is more than just another automotive media outlet. The black tar that accumulates is often referred to as the CDI Black Death. Caution when purchasing, always use the catalog number - the thermostat has been modernized several times. In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. The solution is to replace the crankshaft, liners. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. Here, careful verification is important. Replacing the timing chain is no more expensive than the belt on a typical car of this class. Please watch our video which covers the 5 principles of tuning your car. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. 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). It was also installed on the E-class W210, Vito and Sprinter. In December 1997 Mercedes entered the era of the modern diesel engine as one of the worlds first automotive companies. Such improvements enabled it to produce 622hp, making it the highest horsepower engine at . Plastic painting tips for car interior and exterior.Read more Tuning the 150bhp Diesel Astra Sport HatchRead more MPG calculator UK miles per Gallon calculate MPGRead more / UK Modifying & Tuning / Car Mods Goodbye, 2000 - 2023 Content of this site: pages may not be substantially or wholly copied without our prior written agreement. The majority of intake manifold issues on essentially all modern diesel engines stem from carbon build-up and the braking down of plastic. 2003 is a time for change. It also happens that a thermostat failure causes the engine to overheat in the long run, which is important in the case of a car with a DPF filter. In terms of issues, there were none that would occur frequently. Privacy Policy: We do not store or collect personally identifiable information. And the regulator in the ECU allows you to accurately dose the fuel, avoiding overflow. 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! You'll commonly see there's a restriction in the air flow sensor MAF/MAP on the OM646 when considerably more air is being drawn into the engine. 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. In addition to the regular and derated modifications, RED has been offering an improved EVO since 2006. The 2.1 CDI engine marked OM 651 debuted in 2008. the engine problems and damage described above. OM602 engine 2.3. Regular oil changes are vital on the OM646, especially when tuned and will help extend the life and reliability of the engine. 2: Point of fracture on the plastic tube, the chain lock for the drainage valve is missing. bar, VTG turbocharger with electrical actuator motor, (variable The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. 125 kW (170 PS; 168 hp) @ 3,800 rpm 400Nm (295lbft) @ 2,000 rpm, 20062009W211 E220 CDI Thats why I compiled the list above in this way. Track day insurance cover Symptoms: too slow engine warm-up. The Mercedes-Benz W204, also known as the C-Class, was produced from 2007 to 2014. Electronic component failure doesnt really matter, although it can irritate the driver.
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