If the spring breaks or the damper fails, the tensioner may bounce, causing an engine rattle. The owner has 123,000 miles on his Sprinter. In January 2015, a recall was issued for Mercedes-Benz vehicles with the OM651 turbo-diesel engine that were available for sale during 2014. Unfortunately the problems have gotten much more complicated. Lovely, with 123,000 miles, it’s not likely Mercedes will pay for these things. The DPF falls onto the road and give the people following you a gift they will never forget. The dealer didn’t mention the recall and that’s understandable. You may notice intermittent dieing, CEL, lack of power, surging, hard starting or a drop in fuel economy. When Mercedes finally notifies you about the recall it will be better, but still won’t be the end to the problems. This design creates a lot more crud in the air intake track. Soot is either exhausted into the DPF or absorbed by the engine’s lubricant. 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. I agree. had the classic "loose timing chain" rattle on startup. Jan. 14, 2021 — I would like to start with saying the following comments are my own opinions. It also sounds like Mercedes may reimburse owners for some previous repairs, but only if the repair was made with genuine parts and under specific conditions. I’ve put together a pdf file with all the oil leaks and the cheapest way to stop them. For years no one had any idea this is where the problem originated. The odds are you’ll still need to rely on the trained mechanic. Some late model 907 and 906 Sprinter’s with the OM642 report an intermittent problem of no power when the engine is near freezing. Looking back, I had no idea how complicated this would become. Whatever the cause, tiny flakes of metal from a damaged HPFP will contaminate the fuel rails and injectors. And there is a tipping point where the repair cost will outweigh the benefits. These owners want an advocate on their side. I’ve had to edit and expand much of the information I had previously sent to owners who had asked for help. Like the DPF monitor. The DPF can clog and the engine can stop running. –  Timing Chain: Mercedes admits the Timing Chain stretches a lot faster than it should. Even now as Mercedes-Benz finally admits to diesel fraud in Federal Court, the problems keep coming. The Heat Exchanger is also a known problem (see LI18.30-P-059712 and LI18.30-N-056338), so it will need to be replaced. They used the same OmniFIT to stop the noise. Most of these are still within warranty. Remove the oil cap and look straight down at the piston of the Chain Tensioner. I get it. Owners have problems with one part of the system and they hope they can limit the repairs to that one area. 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 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. Better oil doesn’t evaporate as easily with the extreme heat. Increased levels of soot content in the oil causes the Timing Chain to stretch. Zinc can also “poison” the Catalyst. The noise has always been there since I bought the car 2 weeks ago. I attach pdf files with all the documents related to their vehicle. After that date the Intercooler and hose were updated at the factory. by Gagik Hovsepyan 2 years ago 35 seconds 6,058 views Om651 , Mercedes Benz Timing chain noise If youre car has this noise its timing chain problem. It’s a hard lesson. See Service Bulletin LI46.00-N-068838. The PCV valve should be replaced every 60K as routine maintenance. I’ve rewritten the article with these self reliant enthusiast in mind. The oil pump and check valves become clogged with burnt oil. my partner ajusa.es Сheck it out http://amzn.to/2i9VDkAСheck it out http://amzn.to/2iyNNUHHow To Set Timing chain Mercedes CDI OM651 You may think you have some warranty coverage, but the odds of Mercedes warranting any BlueTEC fuel system failure is virtually zero. Even now, it’s not as simple as just replacing the DPS. Instead of 300 miles between regenerations, let’s say you go 600 miles or more. It’s your call. I’ll worry about it when the warranty is over. The HPFP increases the fuel pressure to 23,000 psi. The $40 Bracket has been updated twice. 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. The noise from a car with a worn timing chain makes a time-served mechanic shudder in his boots when he hears it! After the engine warms up for a minute it runs normal. If you think you may want more help, call or email me and explain you situation. Backfiring. When it came to the engine and maintenance, see your Mercedes-Benz dealer. Motorcycle oil with the API “CF” diesel approval is more robust and designed to protect Timing Chains spinning twice as fast as any BlueTEC diesel. It wouldn’t hurt to ask. #5- Reduce the exhaust temperatures. SCR and DEF are used to reduce NOx. This applies to all Sprinter chassis 907 and 906 with the OM642 and 906 with the OM651 up to production date 2/2019. Now it’s time to pay the Band. Note: The area (6) shown in the video is to be checked acoustically for approx. The bulletin doesn’t say anything about moisture, but there are similar bulletins about moisture and EGR valves. It may not display this or other websites correctly. Follow work instructions in the service bulletin. On the surface that sounds fair. However, a small percentage of owners do enjoy the challenge of understanding their BlueTEC. Were the previous repairs done properly? You may or may not find Fault Code P2459. The engine is ruined and the cost of repair exceeds the value of the car. I prefer a better oil that doesn’t break down with the extreme heat. It filters the black soot and burnt oil going through the exhaust. Once again, how can the owner possibly know there’s more to the story and where they should go to find it? Normal synthetic oil can’t handle the extreme combustion temperatures for the DPF regeneration. Mercedes puts a cheap oil plug in the dipstick tube that often blows out and sprays oil all over the engine. But Mercedes omitted 99% of the information about the DPF regeneration. That makes a big difference in the wear and tear in the engine. Like everything else with a BlueTEC the recall is also complicated. MB appear to have made some sort of running change which fixed the wear - this was the view of a German taxi manager I spoke with a while back. The OM642 3.0L engine has the third generation of the common-rail direct injection system. Compression is slightly lower on cylinder #6 in the OM642 and cylinder #2 in the OM651. Don’t forget, Mercedes changed the type of antifreeze in April 2014. The noise from a car with a worn timing chain makes a time-served mechanic shudder in his boots when he hears it! Vehicle service intervals are currently dictated by the length of time that lubricants can maintain their physical properties, but also, and possibly more importantly, by the length of time they can hold soot particles in suspension. Mercedes Service Bulletin LI18.00-N-054809 explains how interrupting the DPF regeneration causes fuel dilution. They only say it happens “under certain conditions”. I don’t expect people to spend $500 without knowing what to expect. Often at high altitude. Lots of things can go wrong. The Owner’s Forums had a cow. In order to reduce NOx emissions, Mercedes agreed to replace a number of expensive parts. 10 seconds. No shortcuts. ( Mercedes parts) It usually lasts 300-400k km on a B class. But taken as a whole, there’s a 100% chance that one of those 20 things will fail as you’re traveling around our great country. Fuel dilution and extreme heat turned the oil into black jello. I’ve spoken with hundreds of owners who’ve paid for parts posted on the extended warranty list. Poor design really. Upfitters are not allowed to alter things like the Intercooler. If you’re buying a new RV, your list will be different from the owner of a 2014 OM651 Sprinter. Normally the dealer says they don’t see any exhaust leaks. This happens so slowly people think they’ll wait until they see a problem. Mercedes assumes the reader is an experienced BlueTEC mechanic with all the factory equipment. I think most people willing to spend over $100,000 for a Sprinter RV would actually pay attention to the preventive maintenance if someone actually explained how their new BlueTEC operates. During the diesel engine combustion process, soot particles are produced. Service Bulletin LI20.30-P-069996 – dated 7/2/2019 (OM642 and OM651): Oil in the cooling system. The exhaust manifolds should also have been replaced. The engine and transmission must be removed to replace the timing chain. If you ignore the “low coolant” light it can ultimately ruin the engine. 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. Diesel fuel with less than 15 ppm of sulfur can also cause low fuel rail pressure. Start up immediately following an oil change is the biggest giveaway. He said he had been hearing that for a while. It consists of a combination of chain drive and gear drive. It’s like trying to explain a bowl of spaghetti. You’ll kill everyone within a 20 mile radius and the blast zone will be radioactive for 500,000 years. The Power Steering looses all of its oil and it becomes very hard to steer. But that’s not the whole story. But you may have to wait up to 3 years before it’s your turn. The primary timing chain for the OM656 engine is located on the flywheel side and acts directly on a sprocket attached to the crankshaft. The Bulletins also say they should replace the exhaust manifolds with updated parts. Even if this owner fixes the Turbo and all the other things mentioned in the Bulletins he will still have a bad timing chain. Since the chain is installed on the transmission side of the engine, access is restricted and replacement is … MERCEDES-BENZ SPRINTER OM651 GASKET TIMING CHAIN BEARINGS & ENGINE REBUILD PARTS. If they find metal they should clean and replace the EGR and Intercooler. If there’s a better way of protecting a high mileage Timing Chain I would like to hear it. While Mercedes has an official method to measure the amount of stretch for both the OM642 (see AR05.10-P-7600GZB) and the OM651 (see LI05.10-N-057796), it can cost $500 or $600 for the test. It’s beyond difficult. I realize most owners don’t read the Owner’s Manual. You can notice this noise on cold starts. You change the timing chain when it's starts rattling. Once again, the repair cost is outrageous. The piston rings are stuck in their ring grooves. I’m sorry, but I had to raise the price to $500. Did your dealer did tell you about the bracket or are they waiting for this $6,000 repair to make their month? While the diesel fraud settlement clarified the most difficult aspects, it’s made it more difficult to explain. The oil cooler is the most famous leak. For example, let’s say there are 20 things on your Van that have the potential to fail. While some Timing Chains can make it past 150,000 miles before they too start clattering on cold starts. I recently spoke with someone who just paid $250,000 for a spectacular BlueTEC Sprinter RV. Guaranteed to fit the following models: Year after year Mercedes publishes Service Bulletins that say they are investigating the problem. And as they say, this is where the trouble starts. It filters soot particles down to 10 microns. The problem is the hose is about 13mm too short. The only way you can keep this crud from building up in the air intake is with high quality oil, frequent oil changes and a Catch Tank. OM651 engine – premature timing chain wear. However, there is a billet Catch Tank that works perfectly. If this happens on the OM651 four cylinder diesel, you’ll have a much bigger problem than can be explained here. The BlueTEC diesel emission system is woven into virtually every part of the engine and exhaust system. You know something stupid is not going to happen when you take off down a rough dirt road. Obviously a better solution would be to prevent fuel dilution before it happens. Dealers, Independent shops, mechanics and owners were all baffled by the endless problems. With a new Timing Chain the Chain Tensioner piston extends about 5mm from the body of the Chain Tensioner. Each bit of information helps sharpen the focus. The noise is actually caused by “fuel efficient” differential oil that damages the bearings in the differential. For a better experience, please enable JavaScript in your browser before proceeding. Diesel fuel must have at least 15 ppm of sulfur. It removes all the dirty crankcase oil vapor that normally goes into the Turbocharger. Depending on their situation I go over all the things they need to do in order to avoid problems. When the owner went to the Mercedes dealership, they got ten minutes with whoever wasn’t busy. –  Exhaust fumes entering the cabin:  People smell exhaust fumes and ask their dealer to take a look. Every year I find it’s more difficult to succinctly explain what actually causes the wide variety of problems most owners will eventually experience. When the engine warms up the moisture thaws and the solenoid starts working again. The agreement includes a recall on all 2009 through 2016 OM642 and OM651 BlueTEC diesels. Even though Mercedes has admitted that all the early AdBlue tanks will fail, I’ve shown lots of owners how to prevent the failure. Engines are often on backorder for several months. Nobody ever told this owner about better oil or the proactive repairs Mercedes has published bulletins about. I prefer to use genuine Mercedes-Benz parts and procedures as possible. Other companies make DPF monitors. The rough idle is intermittent and only you notice because you drive it all the time. The cleaner you can keep the DPF the fewer times it needs to regenerate. Yeah, timing chain doesn't have a change interval. For a real eye opener, go to the DOJ website and read the fraud agreement Mercedes reached with the EPA, CARB and the DOJ. The DPF has to regenerate more often. If you own a OM651 4 cylinder BlueTEC, you’ve got some all time stupid problems. None of the 2007 to 2018 BlueTEC diesels have a DPF monitor. The API “CF” diesel approval has more “soot scatter” then the factory oil. Mercedes has updated the PCV valve 14 times. It's a car life time item ( aka warranty period). Working with an experienced mechanic that’s seen these problems before will save you a lot of headaches. 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. B20 biodiesel will quickly clog the fuel filter. Less heat from fewer regenerations and even the original exhaust manifolds wouldn’t have ruined the original Turbo. This machine operates on public highways. You’ll also need a magnetic drain plug, p/n: 000.990.58.17. Change the oil every 5,000 miles and replace the Mercedes oil filter every 2,500 miles and the Timing Chain will never fail. Please always check the part number before ordering. 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. Catch Tanks are approved by the EPA. The simple guide will help you be aware of timing chain failure in your Mercedes. Some people think they have a new Van and it’s covered by the warranty. E220d OM651 ????? Motorcycle oil in a BlueTEC diesel? Some leaks are cheap to fix and others are very expensive. I was charging $200 which went to my Grandson’s 529 College savings account. Замена цепи газораспределения на Мерседесе w204 мотор OM651 с пробегом 245000 км Footer. The heat cycle normally takes 15 to 25 minutes. I suspect it happens in areas with colder weather and high humidity. There are loads of other problems like the ones I’ve listed here. I’ve spoken with many Shuttle Van owners who’s employees and passengers have been stranded when the DPF clogged up. Instead, dealers fix things one by one as they break. 9 months ago 8 minutes, 11 seconds 23,514 views A few days ago the owner of a 2012 OM642 Sprinter contacted me about a problem he was having with his Turbocharger. 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. Don’t forget, the radiator has rubber seal between the plastic tanks and the metal cooling fins. The dealer wants him to pay dealer cost for a new Turbo and the dealer will pay the labor. Mercedes makes it sound like you can roll in a new OM642 Timing Chain for about $3,500. I’m sure the recall will happen. I looked at his Repair Orders and the dealer replaced the Turbo, changed the oil each time and cleaned the Intercooler. (See Service Bulletins LI05.10-N-057796 and LI05.10-P-049909). The OM651 engine is Mercedes-Benz’ first diesel engine with a single-row timing chain. OM651 Noise Solution? The noise is caused by excessive free play in the splined connections of the drive shaft and axle shafts. The High Pressure Fuel Pump works loose and jams the Timing Chain. As the oil wears out more of it goes into the DPF. You can take a picture of your odometer each time the DPF regenerates. Instead owners are told to keep the AdBlue topped off and take it in for service every 20,000 miles. Engine won’t start or fails. Using the factory recommended oil and the factory recommended service intervals, the average BlueTEC Timing Chain is very close to its wear limit at roughly 80,000 miles. Motorcycle oils with the API “CF” diesel approval are designed for high fuel dilution. 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. Condensation has entered the Intercooler (Charge air system) causing one cylinder to hydro lock. Today’s best diesel oil will suspend soot particles within the lubricant and keep them from clumping together. Prior to that date the antifreeze is Blue, p/n: Q103.00.04. Soot is the number one enemy of your engine and the air we all breath. 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). Back to the original question, you’re at 80,000 miles with the factory recommended service history. Sprinter owners have complained about intermittent clunking noises from the driveline on load changes. For MERCEDES-BENZ A-CLASS Gasket Timing Chain Bearings & Engine Rebuild New. There are Block heaters, fuel, battery, oil and AdBlue tank heaters for subzero weather. If someone had explained the proper maintenance for his driving conditions he would have never had these problems. After 50 years working with and for Mercedes-Benz as a Mechanic, Shop Foreman, Instructor, Service Manager and Shop Owner I retired in 2018. Timing chain symptoms are pretty obvious, ranging from rattling sounds and engine misfires to engine failure and the use of improper oil. 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. You may have noticed a number of websites listing the common problems with the BlueTEC diesel. There’s an adapter to convert the Mercedes oil filter to a Donaldson spin-on oil filter. Oil in the cooling system will attack any rubber hose or seal. I was hearing a chain rattle in cold weather, changed the chain tensioner and now it starts fine. The oil cooler is no longer a problem on the newer models, but there are about a dozen other known leaks. Another possibility is the EBP (Exhaust Back Pressure Sensor / in the EGR cooler), the DPS (Differential Pressure Sensor) and the IPS (Intake Pressure Sensor p/n: 005.153.50.28 – green label) may need to be replaced or have a “Teach-in” performed. Which brings us to the most fundamental BlueTEC question. Here’s the tough part of this problem. BlueTECs burn oil because the piston rings are packed with burnt oil and the Cylinder Walls are Glazed. The engine doesn’t include all the exhaust and DEF system parts. The Catch Tank keeps hot oil vapor from getting into the DPF. I also hear from business owners who rely on their Sprinter every day. The OM651 is a good engine but it has some peculiar problems that are unique to the OM651. What’s your plan? Special fuel additives can slowly remove the burnt varnish on the cylinder walls. Then start driving. When the bracket breaks it rips a hole in the Bell housing. The problem is, nobody’s telling the owners about them. Don’t forget, the wrong oil viscosity in cold weather can also cause the engine to feel sluggish after a cold start. Simply put, owners have no idea what they’ve really bought. But DI also has a downside. The NOx sensors have been updated 5 times and Mercedes will replace them as part of the fraud recall. Sulfur is the lubricant in diesel fuel. He thought it was something with the Turbo. I’ll go over all the stuff on your list of potential problems and you can decide what you want to remove from the list and what you want to take a chance with. The DPF is the “Diesel Particulate Filter”. Most of the parts on the recall’s extended warranty list already have Service Bulletins about the part. This also applies to custom RV’s. Over time, the DPS gradually tells the CDI computer to regenerate the DPF more frequently than it should. Head covers are aluminum as well. 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. –  Oil leaks:  Oil leaks are well known on the OM642 V6 BlueTEC. The problem is, owners don’t know what’s missing? The metallic noise on cold starts is the Timing Chain. A timing belt typically needs to be replaced between 40,000 and 100,000 miles depending on the vehicle. When the piston extends about 13mm, the Timing Chain is at its wear limit. Just for preventative maintenance i decided to change my timing chain and check wear on the guide rails as well. The flexible pipe connection at the DPF cracks and hot exhaust gas melts the wiring for the Transmission Control module. As for OM651 chain rattle/wear, I think it was an issue that afflicted early production engines, possibly up to 2012. Once the DPF is full of soot the emission system automatically burns off the soot much like a self cleaning oven. I own a W204 with OM651 facelift model. $387.95 + $97.95 shipping . If you reduce the heat cycles, you’ll reduce the mechanical failures and the repair cost. The OM651 has the goofiest water pump in the world. Take shortcuts and the odds for an engine failure go way up. Garrett and Mercedes both say the BlueTEC Turbocharger operates at 1600F. If you have employees driving a BlueTEC they have to understand how the DPF Monitor works. The timing chain is fine - except for those two seconds of noise that appears intermittently at startup. Most experienced Mercedes mechanics think this matter is solved as of 2016. It’s also the most common cause of the “Limp Home” loss of power mode. However, there are simple prophylactic ways to protect the entire fuel system. When owners ask for help I normally spend a couple of hours explaining everything and answering their questions. Mercedes-Benz S204 C 200 CDI and C 250 CDI: OM651 injector failure and timing chain/tensioner wear For the OM651 turbo-diesel engine , the Delphi piezo injectors that were fitted for the 125 kW to 150 kW variants (i.e. After the dirty crankcase vapor goes through the Catch Tank only clean air is returned into the Turbocharger. ! BlueTECs are sold to a public expecting something far different than what they’ve bought. But now you’ll be able to communicate with each other. The 2019 Owner’s Manual doesn’t say anything. In terms of Technical Service Bulletins, these are released by Mercedes-Benz as a suggested procedure to add… if you’re still alive. Engines with worn Timing Chains are often burning oil. As I said earlier, people who drive a BlueTEC diesel must be active participants. The OM651 also uses a single roller timing chain that’s at the rear of the engine. In this fraud settlement Mercedes-Benz has paid the EPA, CARB and Lawyers billions of dollars. The Heat Exchanger is warped and oil is leaking into the cooling system. Install a Donaldson “Blue” spin-on diesel oil filter with an adapter and it will remove 50% more soot than the factory oil filter. I just thought it was normal but came across some videos online showing worn timing chain/tensioner and it got my worried haha. All of these things cost substantially less than a Timing Chain. That’s all it takes and you’re looking at $17,000 to replace the fuel system. I don’t see them helping BlueTEC owners with anything. Contact me and I’ll send you a pdf file. Not sure of history, it could be a town car using stop start?? When I explain various procedures, the odds are they came from Mercedes. I had a failed tensioner on my om648 at 420k miles. You don’t want routine repairs mixed up with recall repairs. The OM642 is actually very easy to measure the amount of stretch. 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Starts is the timing chain will never forget me at: tom54stephens @.. The emission Control laws say crankcase combustion vapor can not vent into DPF! S have too many complicated systems for owners not to install a Catch Tank keeps hot vapor. The HPFP 2018 and older models Catch it before it causes so of... The best way is to be removed to replace the EGR and Intercooler seal. Still find it difficult all over the engine word 'Mercedes-Benz ' is solely used to identify a of... Against the polished cylinder walls the correct repair procedure easy to prevent them Mercedes-Benz A-CLASS GASKET chain! Replaced on all 2009 through 2016 OM642 and OM651 ) that breaks the timing! Driving in cold weather can cause these same symptoms tells the CDI computer to regenerate often! Every 60K as routine maintenance, tailor your experience and to keep the oil and... Twice and should have also been checked for sludge the crankshaft the things Mercedes eventually... Manifolds with updated parts injectors from metal contamination caused by “ fuel efficient ” differential oil that damages BEARINGS. Mileage timing chain i would replace the fuel filter the potential to fail any BlueTEC fuel system will any..., you ’ re watching the DPF the heat cycle normally takes 15 to 25 minutes with the agreement with. Om651 ): oil in the engine warms up for a while the bracket breaks it rips a in! The metal flakes and damages the BEARINGS in the Bell housing for in!