M272 balance shaft pdf

Repairing the balance shaft gear requires the removal of the engine. Mercedesbenz m272 and m273 engine lawsuit preliminarily. What happens is the timing chain wears the softer metal on the sprocket down and in turn slack is developed in the chain. Defective gears in the balance shaft is a known problem with the m272 3 engines prior to 2009 yet mercedes refuses to issue a recall they have issued technical service bulletins internally.

Mar, 2017 mercedesbenz balance shaft problems and how to check your car. This problems can appear with the balance shaft gears affect up to 10% of mercedes equipped with the m272 engine from 20042008. M272 m273 balance shaft sprocket failure p1200 p1208 p0016. When replacing the balance shaft on engine m272, the counterweight must also be replaced. Advice on repairing m272 balance shafttiming chain. The video shows a simple method to be used on m272 engine in order to spot and detect the balance shaft failure based on a alignment of pulley. Dtc 1200 andor 1208 isare present in mesfi control module. Following on from my complete m271 engine thread please feel free to add resources to this thread for the m272 engine. Common mercedesbenz m272 engine trouble desert oasis. A balance shaft is an eccentric weighted shaft, which is used to eliminate engine vibration.

Dtc 1200 andor 1208 isare present in mesfi control. Jul 16, 2020 prior to mcadams seeking repairs of her suv, a federal classaction lawsuit was filed against mercedesbenz in 2012 on behalf of a proposed class of vehicle owners, including those with the 2006 mercedesbenz vehicles with m272 engines. Note that only the 272 and 273 engines are susceptible to balance shaft failure. Engine diagnosis warning lamp lights up, fault codes 1200 and. The m272 and m273 could be found in all of the model classes minus the maybach and was offered in 2. At a 40 crank angle after downward and pull balance shaft 5 ignition tdc the fitted pin 8 is aligned with. Jul 01, 2016 m272 engine mercedes benz problems with balance shaft gear. Jan 11, 2020 common warning signs of balance shaft failure. The mercedesbenz m272 was a v6 petrol engine that was first introduced in 2004 to replace the m112 engine. Petition for mercedes benz to honor repairing the known. M272 engine serial numbers below 272930 468993 and m273 serial numbers below 273930 088611 generally, produced prior to sept 2006. Apr 20, 2020 the engine in the ml350 4matic is known by mercedes benz to have issues due to a poorly manufactured gear on the balance shaft also known as the counterrotating assembly.

The next three digits are just a variant number for the engine. This is by far one of the most common problems with mercedesbenz models, including e25, e30, and e35. The suit alleged the defective balance shaft gears caused engine malfunctions resulting in costly repairs. Mercedes produced certain models with defective gears in their balance shafts m272 engines or with defective idle gears m273 engines. My ml350s m272 is at 230,000 miles 370,000 km and still going strong. Mercedesbenz balance shaft problems and how to check your car. This can be seen in its 60 degree veeangle, as opposed to the 90 degree angle of its m272 predecessor. Luckily, neither were affected by the balance shaft problem. Dtc 1200 andor 1208 p0016p0017 isare present in me. Mercedes benz m272 engine timing chain repair replacement. If you have a mercedes benz with the m272 engine make sure it has been serial number higher than 2729. Mercedes owner cannot sue company after not properly. Feb 09, 2011 when replacing the balance shaft on engine m272, the counterweight must also be replaced. Looking to buy a m272, wondering about the balance shaft.

Replacing the m272 balance shaft is not an easy job and should only be left to experienced mechanics and diyers. Genuine mercedes benz 27203006 engine balance shaft kit. Furthermore, the symptoms may come on suddenly around more than halfway to your 100,000mile engine checkup. Since the balance shaft gear is driven by the timing chain, which keeps the engine rotating synchronously, when it fails, the timing of the engine will change causing.

Common reasons for balance shaft failure in a mercedes by. This new generation also featured the addition of a balance shaft. Especially when the balance shaft gear is eaten away. Jan 04, 20 when replacing the balance shaft on engine m272, the counterweight must also be replaced. Some mercedes v6 and v8 m272 m273 engines are prone to a failure of the balance shaft sprocket or idler gear sprocket. Balance shaft on my mercedes 2006 m272 faq carsguide. The engine light is not on and there are no codes for any problem, yet the idle has become much rougher and causes the engine to vibrate. Jul 01, 2017 and from what i saw the early m112 and m1 powered w211s now sell for more than the later m272 273. The m272 v6 engines are equipped with a balance shaft. However, that doesnt mean these were the only models that have this problem. The majority of early production m272 mercedesbenz engines show the premature wear of the balance shaft gears. M272 balance shaft, timing chain repair mb medic mercedes benz the mercedesbenz m272 engine is a v6 introduced in 2004 and used throughout the 00s. How to remove balance shaft on mercedes benz engine m272.

The definitive guide to the mercedesbenz m272 and m273. Insert borescope over the righthand chain slide rail as far as the balance shaft guide wheel. Mercedesbenz v6 and v8 engines had timing chain problems caused by balance shaft and idler gear failures. Insert borescope over the righthand chain slide rail as far as the balance shaft. There are a few aspects that set it apart from its predecessors.

The balance shaft and counter weight are specific to engine designation. As a result, a balance shaft was installed in the engine block between the cylinder banks to reduce first and second order inertial forces. I have found that on my ml it happens when the oil level is anything less than full. The 60 degree veeangle eliminates the need for a balance shaft, improving refinement while reducing mechanical complexity. Mb fixed the balance shaft issue half way through the 07 model year but all m272s before that are suspect. The balance shaft in the early mercedesbenz m272 v6 engines was known to have problems due to soft metal being used in the manufacturing process of the timing gear. M272 engine mercedes benz problems with balance shaft gear. Apr 26, 20 how many of the m272 motors got problems with the balance shaft.

Quickly looking through my notes on this, from engine number 272930 468993 part was improved. Dtc 1200 andor 1208 p0016p0017 isare present in mesfi. While these issues are common, they are certainly frustrating for mercedes. There are different versions of these engines for different models. M272 amp m273 engine balance shaft installation and timing. Symptoms of a balance shaft failure are as follows. Unfortunately, the gear itself is not a replaceable item. Mercedes m272 engine service repair manual known m272 engine issues. I have two vehicles with m272 s and they have, and continue to perform wonderfully. The engine serial number indicates it is part of a small group of m272 engines with potential balance shaft issues. Vehicles with known fault balance shafts with soft metal.

Beyond the balance shaft issue the 272273 are too complicated for their. Within 30 days of your shipment date, defective parts may be returned for a refund, store credit, or exchange. Engine diagnosis warning lamp lights up, fault codes 1200. It is driven by the timing chain as it needs to in sync with the engine pistons. Mercedes owner cannot sue company after not properly opting. I know they fixed the problem in the models after september 2006, but if you have one of the old models can you then be sure the problem will arise someday or can you be lucky and nothing happens. Like the m112, a balance shaft is installed in the engine block between the cylinder banks to deal with vibrations in the 90 degree v6 design. The balance shaft on my 2006 m272 engine has gone after only 89,000 km. M272 engines are susceptible to wear in the balance shaft gear, which can cause the right camshaft to go out of time and cause catastrophic engine damage. Over time, this gear wears down, causing timing to be thrown off. Mercedesbenz m272 engine mainly from wikipedia, the free encyclopedia but added to. The cat is out of the bag and people know to avoid these cars.

Apr 10, 2019 the balance shaft gear tends to manifest with issues in vehicles with the v6 piston engine, primarily the mercedes m272 that was manufactured between the years 2004 and 2008. The m272 engines are equipped with defective balance shafts gears which wear out prematurely, excessively and without warning, purportedly causing the vehicles to malfunction, the check engine light to illuminate and the vehicle to misfire andor stop driving. Common reasons for balance shaft failure in a mercedes by the. Because of these changes, these engines produced greater power with reduced noise and emissions compared to the preceding m112 and m1. Balance shaft failure is a common issue in mercedes models equipped with the v6 piston engine, mainly the mercedes m272, manufactured in 2004 to 2008. Stiffer engine with lateral main bearing attachments. Dont forget to subscribe and turn on your notification to get n. Developed in conjunction with the m273 v8 petrol engine, the m272 engines cylinder banks were at a 90 degree angle from each other. Order individual parts and kits specifically to a vin number. Any year safe m272 engine page 1 mercedes pistonheads uk. Oct 16, 2020 272273 balance shaft issue thread starter mymini007. There is some weirdest problem with particular type of mercedes benz engines. Jun 23, 2015 the plaintiffs allege mercedesbenz m272 and m273 engines stop suddenly while driving and the only way to fix the engines is to replace the idle gears or balance shafts. Nov, 2018 balance shaft gear problems are most typical among v6 piston engines, primarily the mercedes m272 in models manufactured between the years 20042008.