Doing the repair properly can cost $6,000 for the OM642. In these vehicles, the seal ring between the timing chain tensioner and the engine may leak oil – this could result in a hazard for other road users and, in extreme cases, a fire risk (PRA 2015/14509). The DPF typically regenerates every 300 or 400 miles. The soot coming from a diesel is loaded with nitros oxides (NOx) and other cancer causing chemicals. The Timing Chain is also on the list for the extended warranty of 11 years or 120,000 miles. Cause: ... AR05.10-S-7600E Check timing chain Model 447 with engine 651 Remedy AR05.10-S-7600SJ Check timing chain Engine 651 in model 636, 639 Catch Tanks are approved by the EPA. Double the repair cost. The Catch Tank keeps hot oil vapor from getting into the DPF. But you may have to wait up to 3 years before it’s your turn. I prefer to use genuine Mercedes-Benz parts and procedures as possible. While the diesel fraud settlement clarified the most difficult aspects, it’s made it more difficult to explain. If you go to my separate Blog Post about the DPF monitor, I explain what it does and why it’s so important. Replace the Coolant Recovery tank. Who cares if Mercedes will tow you 400 miles from Zion National Park. High concentrations of soot can increase the local acidic level and, around the piston where high temperatures and volatile gases coexist, corrosion will also occur. Engine won’t start or fails. It filters the black soot and burnt oil going through the exhaust. I attach pdf files with all the documents related to their vehicle. This is another known problem where Mercedes has published many Service Bulletins about exhaust leaks. The chain has stretched beyond its wear limit. Mercedes hasn’t finalized everything and dealers also don’t know what’s happening. The High Pressure Fuel Pump works loose and jams the Timing Chain. You change the timing chain when it's starts rattling. I’ve rewritten the article with these self reliant enthusiast in mind. Not sure of history, it could be a town car using stop start?? It’s a hard lesson. The OM651 also uses a single roller timing chain that’s at the rear of the engine. The Turbocharger was made by Garrett. If you don’t know when the DPF is regenerating, your choice comes down to protecting the engine or protecting the DPF. Other companies make DPF monitors. –  Oil filtration:  Diesel engines produce soot. my partner ajusa.es Сheck it out http://amzn.to/2i9VDkAСheck it out http://amzn.to/2iyNNUHHow To Set Timing chain Mercedes CDI OM651 Bulletin LI09.40-P-054328 says the oil passages in the Turbo’s pedestal are also restricted with burnt oil. You must log in or register to reply here. It’s taken years of Mercedes blind alleys and half truths to figure out what they finally admitted to in Court. Mercedes-Benz C207 E 250 CDI: OM651 timing chain/tensioner wear There have been reports of wear of the simplex timing chain and/or chain tensioner at higher mileages. The Owner’s Manual warns of engine failures related to the DPF regeneration. Sprinter owners have complained about intermittent clunking noises from the driveline on load changes. For the Mercedes-Benz W166 ML 250 BlueTec's OM651 turbo-diesel engine, there have been reports of wear of the simplex timing chain and/or chain tensioner at higher mileages. The flexible pipe connection at the DPF cracks and hot exhaust gas melts the wiring for the Transmission Control module. Soot is the number one enemy of your engine and the air we all breath. –  Catch Tank:  The emission control laws say crankcase combustion vapor cannot vent into the atmosphere. The updated part numbers are in the bulletin. Starting in model year 2019, Mercedes includes the DPF Monitor. A broken timing chain will cause an engine to not start or fail while … Motorcycle oils with the API “CF” diesel approval are designed for high fuel dilution. Sprinters are a blast to take on and off road. I don’t sell any products. If you have employees driving a BlueTEC they have to understand how the DPF Monitor works. The recall should have started last October, 2020. A loud popping hear under the hood is known as a backfire. As the oil wears out more of it goes into the DPF. You can always hear a slightly increased level of noise until the filter housing fills up. Extreme heat from the DPF regeneration causes the exhaust manifolds to flake and break apart. But is that even the end of the repairs? The DPF has to regenerate more often. Mercedes Service Bulletins LI09.40-N-063089 and LI09.40-P-054329 both explain how the Turbocharger starves for oil after the extreme heat breaks down the oil and clogs the oil galleys. Even if this owner fixes the Turbo and all the other things mentioned in the Bulletins he will still have a bad timing chain. This is an easy $8,000 repair that’s easy to prevent. “Direct Injection, Problems and Solutions | The Fine Print” – https://www.youtube.com/watch?v=xrLNDgrIw3U&t=90s. If you don’t have metal, perform the fuel system test to determine the cause.B20 biodiesel is another problem to avoid at all cost. I had a failed tensioner on my om648 at 420k miles. The RV Salesman spent hours explaining the coach and how it works. The frustration for most owners is no one at Mercedes will explain the entire system and what actually needs to be done. Broken Belt Tensioner or Chain Tensioner . BlueTEC fuel systems typically fail because the diesel fuel was contaminated with gasoline or water. I’ve cleaned up hundreds of BlueTEC diesels that were burning a quart of oil every 200 miles. The DPS affects other parts of the system that aren’t so obvious. Giving your driver a DPF Monitor with instructions they can understand should give you some peace of mind. Diesel fuel must have at least 15 ppm of sulfur. It’s slightly different from one year to the next. Often at high altitude. I get these calls all the time. I no longer have any affiliation with Mercedes-Benz or its authorized dealers. Over time, the DPS gradually tells the CDI computer to regenerate the DPF more frequently than it should. If owners had done these 5 simple things when their vehicle was new, they wouldn’t have problems now. This happens so slowly people think they’ll wait until they see a problem. The HPFP increases the fuel pressure to 23,000 psi. This is a big part of what causing so much of the extreme heat. When oil blended with diesel fuel is subjected to the extreme heat caused by high combustion temperatures and an exhaust driven Turbocharger that runs at 1600F, the oil turns into the sludge. Were the previous repairs done properly? With a much lower NOACK value and a Catch Tank, what little oil vapor gets into the DPF will be significantly less than the factory oil. 1. The Heat Exchanger is warped and oil is leaking into the cooling system. Mercedes-Benz actually has a Global service bulletin warning about severe damage to the fuel system caused by diesel fuel with less than 15 ppm of sulfur. When Mercedes finally notifies you about the recall it will be better, but still won’t be the end to the problems. A few years ago, I suggested owners could save the Timing Chain by switching to a certain type of motorcycle oil. There’s an easy way to prevent this. Just replaced a 70,000 mile b class chain, the noise it made after the ol change was horrendous. If someone had explained the proper maintenance for his driving conditions he would have never had these problems. It may do this very intermittently when driving in cold weather at high altitudes. Since my post above in 2016, we have seen a lot more chain issues with the 651! Zinc protects the Timing Chain from stretch. It took me whole day to take this out and fit a new one. A few days ago the owner of a 2012 OM642 Sprinter contacted me about a problem he was having with his Turbocharger. Mercedes uses a cartridge oil filter that removes soot particles down to 30 microns. This stuff is hard. While some Timing Chains can make it past 150,000 miles before they too start clattering on cold starts. You’ll also need a magnetic drain plug, p/n: 000.990.58.17. It’s not something the average owner will enjoy. Mercedes has redesigned the chain and sprockets for the third time. Once again, this is one of the anomalies specific to each individual BlueTEC diesel and its unique operating conditions. I’m sorry, but I had to raise the price to $500. Its design allows coolant to enter the engine’s vacuum system and eventually enter the electrical, brake booster and vacuum pump. See Service Bulletin LI35.30-N-049982. The oil pan should have also been checked for sludge. With the high thermal loads inflicted by the DPF regeneration, Mercedes knows the oil will vaporize. When I explain various procedures, the odds are they came from Mercedes. Just for preventative maintenance i decided to change my timing chain and check wear on the guide rails as well. Like the DPF monitor. Persistence and proven methods will bring a BlueTEC back from the brink, but only if the Timing Chain hasn’t stretched beyond its wear limit. Since the chain is installed on the transmission side of the engine, access is … If you have questions, you can call as many times as it takes. Yeah, timing chain doesn't have a change interval. On the surface that sounds fair. Diesel fuel with less than 15 ppm of sulfur can also cause low fuel rail pressure. The Owner’s Forums had a cow. Install a Donaldson “Blue” spin-on diesel oil filter with an adapter and it will remove 50% more soot than the factory oil filter. He thought it was something with the Turbo. In terms of Technical Service Bulletins, these are released by Mercedes-Benz as a suggested procedure to add… by ????? No one has ever told me their Salesman or a Service Advisor ever explained the DPF monitor. When you add all of this up, it’s easy to exceed the value of the Van. Mercedes knows sooner or later every owner will have problems with the DPF. Even now as Mercedes-Benz finally admits to diesel fraud in Federal Court, the problems keep coming. After the dirty crankcase vapor goes through the Catch Tank only clean air is returned into the Turbocharger. But it appears model years 2017 and 2018 may also experience problems with the DPS. If Mercedes knows interrupting the DPF regeneration can cause engine failure, why didn’t they provide some way for owners to know when the DPF is regenerating? MERCEDES-BENZ SPRINTER OM651 GASKET TIMING CHAIN BEARINGS & ENGINE REBUILD PARTS. It’s beyond difficult. Once again, it’s simpler to prevent the problem then it is to dig out of the hole. Zinc can also “poison” the Catalyst. It will need to be replaced on all 2018 and older models. The engine and transmission must be removed to replace the timing chain. Mercedes published many service bulletins about the DPS. Unfortunately the BlueTEC technology has gotten even more complicated. When new, the Camshaft timing is at TDC or zero degrees at the crankshaft. This video will really help you understand how the basic problems begin. This footer is unique to XenBase. Over time, it’s the extreme heat cycles that does all the damage. Now more than ever you need to work with a Mechanic who understands the parts on the list and how you can take advantage of this opportunity. Service Bulletin LI20.30-P-069996 – dated 7/2/2019 (OM642 and OM651): Oil in the cooling system. Protect the Timing Chain with frequent oil changes. Polyol Ester synthetic oil is naturally cleaner and has <1 of the Ash everyone worries about. The noise from a car with a worn timing chain makes a time-served mechanic shudder in his boots when he hears it! Ester synthetic flows better in extreme cold. Most of the parts on the recall’s extended warranty list already have Service Bulletins about the part. You may think you have some warranty coverage, but the odds of Mercedes warranting any BlueTEC fuel system failure is virtually zero. Garrett and Mercedes both say the BlueTEC Turbocharger operates at 1600F. When the Camshaft timing is thrown off by a stretched timing chain the NOx emissions increase. The Bulletins also say they should replace the exhaust manifolds with updated parts. But if you’re not proactive and make the preventive repairs now, you can expect to see the same problems. Each one by itself has a 5% chance of failing. The problem is the hose is about 13mm too short. It’s your call. All of these things cost substantially less than a Timing Chain. There are loads of other problems like the ones I’ve listed here. The BlueTEC has a PCV valve that sends the crankcase vapor into the Turbo where it continually recirculates through the EGR and the air intake system. The Heat Exchanger is attached to the Oil Filter housing. Depending on their situation I go over all the things they need to do in order to avoid problems. Backfiring. Mercedes assumes the reader is an experienced BlueTEC mechanic with all the factory equipment. There’s no one to explain all the unique preventive maintenance that never made it into the Owner’s Manual. After that date the antifreeze is Pink, p/n: Q103.00.05. The 2019 Owner’s Manual doesn’t say anything. Feel free to verify this with your dealer. If the spring breaks or the damper fails, the tensioner may bounce, causing an engine rattle. Change the oil every 5,000 miles and replace the Mercedes oil filter every 2,500 miles and the Timing Chain will never fail. If oil has been in the system very long, over 3 months, you’ll have problems with leaks. The fuel filter does not protect the fuel rails and injectors from metal contamination caused by the HPFP. It's a car life time item ( aka warranty period). Mercedes makes it sound like you can roll in a new OM642 Timing Chain for about $3,500. It filters soot particles down to 10 microns. Mercedes Service Bulletin GI01.10-P-056315 explains how this oil sludge destroys the engine. The bulletin doesn’t say anything about moisture, but there are similar bulletins about moisture and EGR valves. Soot contaminated oil has been shown to produce significant amounts of engine wear. You can take a picture of your odometer each time the DPF regenerates. They might lose some, but I talk to a lot of people will do the preventive maintenance if someone explains what and why things are done. Upfitters are not allowed to alter things like the Intercooler. JavaScript is disabled. If you reduce the heat cycles, you’ll reduce the mechanical failures and the repair cost. The owner has 123,000 miles on his Sprinter. They only say it happens “under certain conditions”. The BlueTEC diesel is unlike any gas or diesel engine ever made. Mercedes hasn’t made it easy, but if you diligently follow all their technical bulletins there’s actually a roadmap to reliability. But no single bulletin explained the complete problem. This is not about bashing Mercedes-Benz. This is where things get murky. Then start driving. Please always check the part number before ordering. The guidelines are strict. I forgot, ask your dealer. I’ll worry about it when the warranty is over. Замена цепи газораспределения на Мерседесе w204 мотор OM651 с пробегом 245000 км But for the owners who will read the Owner’s Manual, they should be able to find all of the important operating requirements. When the engine warms up the moisture thaws and the solenoid starts working again. When the owner went to the Mercedes dealership, they got ten minutes with whoever wasn’t busy. The further you can go between automatic regenerations the easier life is for your engine and emission system. –  Exhaust fumes entering the cabin:  People smell exhaust fumes and ask their dealer to take a look. Contact me and I’ll send you a pdf file. That’s why you install a Catch Tank. For a real eye opener, go to the DOJ website and read the fraud agreement Mercedes reached with the EPA, CARB and the DOJ. Once Mercedes notifies you of the recall, you can ask Mercedes-Benz for reimbursement. For years, Sprinter owners have complained about howling noises from the front or rear differentials. I assume I’m explaining it to someone who’s not a factory trained mechanic. B20 biodiesel will quickly clog the fuel filter. I suspect Mercedes might pay for the Turbo based on the history of this particular Turbo. Also if anyone has any ways of … This is known as the DPF regeneration. Even though Mercedes has admitted that all the early AdBlue tanks will fail, I’ve shown lots of owners how to prevent the failure. Less heat from fewer regenerations and even the original exhaust manifolds wouldn’t have ruined the original Turbo. See Service Bulletin S-B-00.20/102a. Start the engine and raise the idle to about 1,000 RPM’s. It’s like driving without knowing how much oil is in the engine or how much air is in the tires. Every year I find it’s more difficult to succinctly explain what actually causes the wide variety of problems most owners will eventually experience. Soot is either exhausted into the DPF or absorbed by the engine’s lubricant. Some engines (M112/3 for example) it's possible to prime the filter after a change. Some leaks are cheap to fix and others are very expensive. Depending on your situation, there are lots of things you can do that will prevent the oil from getting into the DPF. People think they get a new engine and that’s everything they could possibly need. The higher the mileage the more work needs to be done. I got the car with 137k miles and changed the tensioner at 187k miles. Even now, it’s not as simple as just replacing the DPS. What if the engine had 119,000 miles? The word 'Mercedes-Benz' is solely used to identify a make of automobile. You have to replace tensioner and ?? For the mechanics who’ve struggled to fix these things it’s small consolation, but it explains a lot. A 651 050 08 00 Chain tensioner 1 Modified chain tensioner X A 000 993 82 76 Timing chain 1 X Operation numbers/damage codes Op. Some late model 907 and 906 Sprinter’s with the OM642 report an intermittent problem of no power when the engine is near freezing. As far as I can tell, the timing chain is still simplex on the OM654. ! After 50 years working with and for Mercedes-Benz as a Mechanic, Shop Foreman, Instructor, Service Manager and Shop Owner I retired in 2018. Engineers and mechanically inclined enthusiast actually love the challenge of a BlueTEC. Throw in all the other known problems and you’re at the cost of a factory rebuilt engine. The odds are you’ll still need to rely on the trained mechanic. Mercedes solution is their Group 3 MB229.52 oil with <.8 of Ash to protect the DPF at the cost of the Timing Chain and other internal parts. Most of these are still within warranty. The exhaust manifolds should also have been replaced. The cleaner you can keep the DPF the fewer times it needs to regenerate. The oil cooler is no longer a problem on the newer models, but there are about a dozen other known leaks. Copyright 2013 Stephens Service | All Rights Reserved | 'Mercedes-Benz' is a trademark of Mercedes-Benz of North America, Mercedes-Benz USA LLC and other Mercedes-Benz corporations. Mercedes will eventually fix some of these things as part of the recall. The drive of the camshafts sits at the rear end of the engine (output side) to keep the height at the front end as small as possible. Special fuel additives can slowly remove the burnt varnish on the cylinder walls. I’ve had to edit and expand much of the information I had previously sent to owners who had asked for help. –  Oil leaks:  Oil leaks are well known on the OM642 V6 BlueTEC. If the owner wants to know something that should have been in their Owner’s Manual, they’ll have to pay $68 per day for access to Mercedes technical information. E220d OM651 ????? If they find metal they should clean and replace the EGR and Intercooler. So many times owners jump in and fix the current problem. It’s like trying to explain a bowl of spaghetti. Guaranteed to fit the following models: Less soot in the oil means less Blow-by at the piston rings, less crud in the DPF and longer Timing Chain life. Note: The area (6) shown in the video is to be checked acoustically for approx. I own a W204 with OM651 facelift model. Mechanics actually prefer dealing with customers who understand just how complicated their vehicle actually is. I think condensation is getting in the valve and it freezes. It started out as a way to explain the mysterious problems common to the BlueTEC diesel. None of these were listed on the owner’s Repair Orders. In case you’re unfamiliar with recalls, note that this occurs when either Mercedes-Benz (or the National Highway and Traffic Safety Administration) determines that a specific car model has either a mechanical or safety related issue, which results in the car not meeting motor vehicle safety standards. (Tom Stephens 916.715.0665), Mercedes-Benz Sprinter OM642 & OM651 BlueTec Diesel Issues & Problems, Diesel Particulate Filter and the DPF Monitor operation. Mercedes has been screwing around with this problem for 20 years. The Bracket is attached to the Bell Housing of the transmission. Mercedes says you should install a different hose clamp. You saved a ton on cheap oil to arrive at this point. I suspect it happens in areas with colder weather and high humidity. But there’s more. Rattling Sounds While the Vehicle’s in Idle. I have a theory that it's only stop/start ones that wear through chains as the versions without don't tend to give issues. This is not common, but it has happened. 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Never been addressed, now ’ s not as simple as just replacing the DPS gradually tells CDI! Levels of soot content in the dipstick tube that often blows out and a! Filter to a different hose clamp will outweigh the benefits with nitros oxides and deleting the system...