Hyundai Mu engine

In series Mu is a six-cylinder petrol engine with four-time overhead camshaft ( QOHC ) and 4 valves per cylinder. The engines are built in Asan (South Korea).

The engine block and cylinder head are like its predecessor both made ​​of aluminum. The stroke of 75 mm remains unchanged as the bore of 86.7 mm. The idle speed is 680 per minute, the dry weight of 168.7 kg.

The inlet and exhaust camshafts for each bank of cylinders are connected by a timing chain, the transmission of power from the crankshaft to the cylinder head by means of toothed belt (left picture at the end of the introduction). For this no inspection is provided on some models, its exchange then all 100,000 km in those with inspection of all these 60,000 km is provided, which then exchange all 120,000 km or 60 months. The motors are not free runner. The ancillaries are driven by a serpentine belt. This has a Nachspannautomatik, his inspection depends on the model provided all 32,000 / 48,000 km or 16 /24 months, an exchange only identified need.

The valves are mechanical bucket tappets actuated (right at the end of the introduction). Reducing as compared to hydraulic tappets of the resistance against the cam. Their durability is comparable, but they are cheaper and less dependent on good oil viscosity. Over the years, the surface of cam follower and is removed, thereby reducing the stroke of the valve in the cylinder space. Thus, less air flow, after which the engine is automatically reduced, the amount of fuel and thus its performance. This is accompanied by an audible ticking sound (see ) because the cam no longer constantly rests on the tappets, but this only reached once per revolution - the emergence produces the ticking sound. This may disappear by the expansion in the engine is warm, yet the valve clearance has thus become large. Its test is provided in the maintenance schedule of all 100,000 km maintenance but only when necessary. In this the removed material would be compensated on the part of the bucket tappet. The used here have no resting platelets (hence " shimless mechanical bucket tappets " ), so in this case the plate, but the tappet itself is replaced with one from 40 accurately graded variants. This can usually (150,000 miles) will be merged with the replacement of the timing belt ( 100,000 km ) or the spark plugs.

The cam (gray) pushes the valve (orange) into the cylinder, thereby enabling the air passage free. The tappet sits between the cam and valve, but is not shown here.


The Mu V6 is based on the Delta series and took some new features of the lambda series developed in parallel, published in 2004. This includes the CVVT, switching to mechanical tappets and the almost identical cylinder head.

The series consists of an engine, which is manufactured from the factory in two versions: one for gasoline and one for LPG. The latter is only available in South Korea, where in 2010 debuted models and is thought to be particularly smooth-running alternative to similar economic diesel engine. The marketing of the protected string " LPI " indicates that the system including control unit is supplied by the manufacturer Vialle.

Compared to its predecessor, the delta compression was slightly increased, resulting in an approximately three-percent fuel savings (see ). In addition, the cylinder head has been modified to add a CVVT named camshaft adjustment for the intake side. This only affects the overlapping of the valve opening of inlet and outlet side ( the opening timing at the input side is variable ), but not on the valve and thus the opening period. It is therefore comparable to the BMW single Vanos technology. In addition to better torque in the lower speed range, it reduces mainly nitric oxide levels by the exhaust back leading effect is used a large overlap - this ejected gas is already sucked back into the combustion chamber. 2008 CVVT control the intake camshaft has been extended to one for the output side, and thus is similar to the BMW Double Vanos technology. The now D (ual ) - CVVT named system raised the power by five horsepower to 193. The CVVT is not always listed because of their seriality. For the Kia Cadenza, the engine was increased to 200 hp, the changes made were not disclosed.

The variable intake system (Variable Intake System ) of its predecessor has been extended by one notch to three. Into account so that preferably the pulsation of the air in the intake pipe, which is formed by the opening and closing of the valves. Find these under and over pressure pulses a rhythm adapted their way into the engine compartment, there is a light resonance charging effect, similar to a turbocharger. To achieve it open over the speed range in each case distributed appropriately long airways, resulting in a consistently high level of torque.

The average per capita real consumption of the series is 13.5 l/100 km when used in SUVs, sedans lack these buyer information. This means an increased consumption of about half a liter to the previous series, which is due to the increase in weight of the newer Santa Fe series.

With the Mu series ends the first series V6 from Hyundai. It is replaced by the four-cylinder Theta series.



Listed are the world's Mu built engines for every model, in every country, the motor was offered.

  • Grandeur TG G6EA (188 hp): 2005-2009 (South Korea)
  • G6EA (194 hp): 2009-2010 (South Korea)

Hyundai Santa Fe

  • Santa Fe SM G6BA (189 hp): 2005
  • G6BA (189 hp): 2006-2010

KIA Cadenza

  • Cadenza VG G6EA ( 200 hp ): 2010
  • L6EA ( 165 hp ): 2010

KIA Carens

  • Carens UN G6EA (188 hp): 2006-2008
  • G6EA ( 193 hp ): 2008 -present

KIA Carnival

  • Carnival VQ G6EA (188 hp): 2006-2010
  • L6EA ( 161 hp ): 2007-2011

KIA Magentis

  • Magentis MG G6EA (188 hp): 2001-2008
  • G6EA (194 hp): 2008-2010

KIA Opirus

  • Opirus GH G6EA (188 hp): 2006-2009
  • G6EA (194 hp): 2009-2011

KIA Sorento

  • Sorento XM L6EA ( 161 hp ): 2009-2010