Mercedes-Benz M156 engine
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The M156 is the first automobile
V8 engine A V8 engine is an eight- cylinder piston engine in which two banks of four cylinders share a common crankshaft and are arranged in a V configuration. Origins The first known V8 was the Antoinette, designed by Léon Levavasseur, a ...
designed autonomously by
Mercedes-Benz Mercedes-Benz (), commonly referred to simply as Mercedes and occasionally as Benz, is a German automotive brand that was founded in 1926. Mercedes-Benz AG (a subsidiary of the Mercedes-Benz Group, established in 2019) is based in Stuttgart, ...
subsidiary
Mercedes-AMG Mercedes-AMG GmbH, commonly known as AMG (Aufrecht, Melcher, Großaspach), is the high-performance subsidiary of Mercedes-Benz, Mercedes-Benz AG. AMG independently hires engineers and contracts with manufacturers to customize Mercedes-Benz AMG v ...
, as previous AMG engines have always been based on original Mercedes engines. The engine was designed to be a
naturally aspirated A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a turboc ...
racing unit, and is also used in a number of high-performance AMG-badged Mercedes-Benz models. The engine was designed by Bernd Ramler, famed by the design of the Porsche Carrera GT's 5.7-liter V-10 engine.


M156

The M156 displaces and shares very little with other Mercedes-Benz engine families like the M155. The bore spacing, block design, and other features are unique to the AMG engine. Although this engine displaces 6.2 litres, it is marketed as the "6.3" to commemorate Mercedes' famed 6.3 L M100 engine, its first production V8. The engine uses a bore and
stroke Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor ...
of . When introduced in the 2007 CLK 63 AMG, output was at 6,800 rpm with of
torque In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...
at 5,200 rpm. For the 2007 CLS 63 and E 63, output was at 6,800 rpm with of torque at 5,200 rpm. The 2007 ML 63 had , and the 2008 C 63 had . The final 2013–2015 C 63 AMG ''Edition 507'' had . The engine, however, has been uprated to produce and of torque in the late S 63, E 63, SL 63 & CL 63 model

Applications: * 2006–2010 Mercedes-Benz E-Class, E 63 AMG * 2006–2011 ML 63 AMG * 2007 R 63 AMG * 2006–2010 S 63 AMG * 2006–2011 CL 63 AMG * 2006–2010 CLK 63 AMG * 2006–2010 CLS 63 AMG * 2007–2015 C 63 AMG * 2008–2011 SL 63 AMG *2013 Lucra LC470 R


M156 lawsuit

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 year The model year (sometimes abbreviated as MY) is a method of describing the version of a product which has been produced over multiple years. The model year may or may not be the same as the calendar year in which the product was manufactured. ...
s leading to premature wear. The plaintiff claimed the combination of cast nodular iron
camshaft A camshaft is a shaft that contains a row of pointed cams in order to convert rotational motion to reciprocating motion. Camshafts are used in piston engines (to operate the intake and exhaust valves), mechanically controlled ignition syst ...
s and 9310 grade steel
valve lifter A tappet or valve lifter is a valve train component which converts rotational motion into linear motion in activating a poppet valve, valve. It is most commonly found in internal combustion engines, where it converts the rotational motion of the ...
s contributed to the premature wear, but the defendants had known about the defect since 2007. The lawsuit lasted approximately 14-months. In November, 2012, litigation came to a halt when the New Jersey District Court dismissed the plaintiffs’ first amended complaint for lack of standing. The plaintiffs were given the opportunity to further amend their complaint to show that they had standing to sue, but plaintiffs made no further filings with the Court. On January 7, 2013, the Court signed an order closing the case.


M156 common issues

Some of the main issues that linger in all M156 models consist of failure of the crankcase breather valve. The most common issue with the breather valve is that the diaphragm on the valve deteriorates over time. Another issue with the breather valve is that the hose from the crankcase to the valve also deteriorates and starts to crack. These issues can cause excess oil burning, heavy smoke from tail pipes and misfires. Other common issues are premature wear of engine lifters and camshafts as well as cam shaft adjusters. Common signs of this is a ticking noise at cold start of the vehicle. Other common issues consist of intake manifold failure, head bolt issues in models from 2007 to 2011 and drive belt pulleys.


M159

The M159 is a version used in Mercedes-Benz SLS AMG and current AMG GT3 racecar. Compared to the standard AMG engine, the SLS's engine includes an all-new intake system, reworked
valvetrain A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) into the combu ...
and camshafts, the use of flow-optimised tubular steel headers and dethrottling of the exhaust system. The engine also utilizes a dry-sump lubrication system to lower the
center of gravity In physics, the center of mass of a distribution of mass in space (sometimes referred to as the barycenter or balance point) is the unique point at any given time where the weighted relative position of the distributed mass sums to zero. For ...
of the car.


See also

* List of Mercedes-Benz engines


References


General

* {{cite web, url=http://www.worldcarfans.com/10507138829/new-amg-63-liter-v8-engine---in-detail, title=New AMG 6.3 Liter V8 Engine -In Detail, work=GermanCarFans, access-date=January 16, 2006


External links


Engine and power transfer: Exclusive, high-performance eight-cylinder front-mid-engine and double-declutch transmission in a transaxle arrangement
contains info on M159 engine M156 V8 engines Gasoline engines by model