m156 engine reliability

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Most of the C63's problems arose from trying to "tame the beast's" M156 engine. 7. Therefore, if you are planning to buy an R230, look for a car produced in 2005 or later. Engine serial numbers below have updated gears, which are free from the problem: M272 engines with serial numbers higher than 2729 . . When it works, the ABC exceeds what standard coil spring suspension can do. Problem 1 – M156 head bolt failure. The plaintiff claimed the combination of cast nodular iron camshafts and 9310 grade steel valve lifters contributed to the premature wear, but the defendants had known about the defect since 2007. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Open and close the roof a couple times to make sure that it works. These are standard systems used in virtually all road cars. Questions about how MBWorld.org works...not for car questions. In case of pump failure, be aware that you have toapply a lot of force to the brake pedal to get the car to stop. I imagine the M157 is better on emissions which tho cleaner may imply more ancilliaries to go wrong in the longer term. Here’s how the ABC is different from coil spring suspension: four springs – they support the car and allow suspension movement (suspension travel), four shock absorbers – they dampen the spring oscillations and prevent excessive suspension movement (bouncing), hydraulic piston pump (generates pressure for the entire system), four struts (a strut is coil spring, shock absorber and hydraulic actuator integrated into one unit), two hydraulic accumulators (nitrogen spheres) – one per car axle, pulsation damper and return accumulator (two more nitrogen spheres), hydraulic hoses that connect all of the above. They are closely related to each other and both are reliable. Figure 3 shows some M156 head studs from Weistec. Also, there have been cases of SBC malfunction before the pump reached its design lifespan (it’s a complex system after all). This website uses cookies to improve your experience while you navigate through the website. Despite having excellent performance and winning multiple awards, this engine has its problems . If the car drops earlier, something is wrong with the valve block or there is a leak somewhere (probably a strut). Once the affected cars have been sorted out by the recall, the system is reasonably reliable. You will also find technical information regarding the engines used in these cars. Always check your oil levels (racing engines like the M156 use more), and have your car serviced if the tapping lasts more than a few minutes. Thus, you can expect the maintenance costs to be accordingly higher. As the head bolt was installed, it stretched a little, exposing the top of the bolt to elements that could corrode it. With four camshafts coming in at $700 a pop from Mercedes-AMG, it’s not a cheap fix. The typical cause of failure is increased friction in the mechanism from the accumulation of oil and carbon deposits in the intake manifold. When it does fail on your C-Class AMG, read here to learn how to replace it. Imagine that you’re trying to fix a rough idle or misfire. Here’s a video of an accumulator taken apart. The first indication of a problem is the “Check Engine” light and P0017 or P0016 error codes. If the car feels bouncy or hard, something is wrong. The engine was designed to be a naturally aspirated racing unit, and is also used in a number of high-performance AMG-badged Mercedes-Benz models. The membrane is flexible. The recommendation is to replace the injectors at around 60,000 to 70,000 miles, especially if you love and want to keep the car the M156 resides in for a long time. When introduced in the 2007 CLK63 AMG, output was 475 hp (482 PS; 354 kW) at 6,800 rpm with 630 N⋅m (465 lb⋅ft) of torque at 5,200 rpm. Follow along with this DIY. The hydraulic accumulators serve the function of the shock absorbers. You should avoid cars with incomplete service history. The head bolts installed on the M156 engine were corroding and failing. When it does, the headliner may get soaked in hydraulic oil. The R230 SL-Class is fitted with Sensotronic Brake Control, which is a brake-by-wire system. There are posts running in this section debating the exact content. They are service items and will need to be replaced regularly. Listen for rattling noises while driving with the roof closed. LegitStreetCars) goes on to explain. If any of the bolts holding the cylinder heads break off, a severe head gasket leak may appear. When the bolt top snapped off, a major head gasket problem could follow. These cookies do not store any personal information. In January 2011, the suit filed by the U.S. District Court was dismissed. All engines made before this date are affected – engines with serial numbers beyond 569xx 60 060658 have the updated bolts. Newer cars have improved corrosion resistance. Check if the level of hydraulic fluid is correct. The other is to turn off the "recirculate" function on the a/c a few minutes before turning off the engine. I also need to really consider if I prefer M156 6.2 NA or 5.5TT, from all standpoints, economy, running costs, reliability and so on. Check that the car responds correctly, with no warning messages, to manually adjusting the ride height. If it isn’t, then the car may have been neglected or there is a leak somewhere. This power and performance had a downside. Torn between the m156 and m157 and hearing slot of scary head bolt issues and other stuff with the M156. For me, it's comfort and luxury, not high performance and reliability. The intake manifold in these engines is very complex. Some owners' forums report finding numbers less than 60658 on 2011 C63s. A couple of years ago you had to buy an entire manifold assembly to fix this problem (£800 at the dealership). This is because around 1993, Mercedes-Benz implemented a more environmentally friendly, water-based paint. Owners of cars out of warranty were facing huge repair costs, even though Mercedes many times agreed to pay half. A new pump will cost you around £900. I imagine the M157 is better on emissions which tho cleaner may imply more ancilliaries to go wrong in the longer term. . Your email address will not be published. For lowest cost and highest long-term reliability, I recommend a 2005-2006, pre-facelift SL 350 with standard suspension. “The M156 is the last naturally aspirated AMG engine ever made,” says Palmeri. Find out how to give it a physical. As I see it, the percentage of engines that fail is small, but it’s not worth the risk to me. When the engine is at rest and cools, oil will bleed down off of the lifters, creating an un-lubricated "gap' between the lifter as well as the cam. The ride should be smooth and at the same time, there should be very little body lean when cornering or braking. At that point, the pump needs to be replaced because it has reached the end of its design life. MBClub UK is in no way affiliated with Mercedes-Benz, DaimlerChrysler or any of their respective trademarks. Reconditioned SBC pumps are also available for a smaller price. This article ... How to Change Oil If you want the facelift it will be an M157 unless you get the facelift grill but that doesn't work in my eyes. The ABC is a complex, high-performance system and it will be more expensive to maintain than standard suspension or even the Airmatic. When buying a second-hand car, it would be better to have standard hydraulic brakes that are far less complex and have been proven over decades of automotive use. If you can hear a rattle which disappears after a couple seconds, it’s most likely the timing chain. Some of these cars are getting quite old so the roof can be a bit fussy sometimes. According to Mercedes-Benz, a system in good working order should be able to hold the oil pressure at least for one week. It’s best to do it after rainfall. Hi, it might be a silly question but I'm looking at an e63 w212. The pulsation damper, which is just another nitrogen accumulator, evens out these pulses (membrane deflecting). 30 468993, M273 engines with serial numbers higher than 2739 . Some lifters, though, would seize under the right conditions, meaning the lobe on a given cam would wear away as it continued to hit the frozen lifter. The price of used cars continuously climbs higher, yet there are still budget buys far from boring. If you choose the V12 engine, the maintenance costs will be even higher. The recommendation is to replace the injectors at around 60,000 to 70,000 miles, especially if you love and want to keep the car the M156 resides in for a long time. It is a problem that you should not ignore. In 2011, a class action lawsuit was filed in United States District Court in New Jersey against Daimler AG, Mercedes-Benz, Mercedes-AMG for alleged defects in the M156 engine contained in AMG vehicles built in 2007–2011 model years leading to premature wear. Although the rear brake pads and rotors wear more slowly than the front on your Mercedes, they're just as important to replace.

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