Engine Hyundai G6AU

The 3.5-liter gasoline V6 engine Hyundai G6AU was produced only from 1994 to 1999 and was installed on top modifications of the most expensive Grandeur and Dynasty models. This power unit is essentially a clone of the 24-valve version of the Mitsubishi 6G74 engine.

The Sigma family also included engines: 2.5 L – G6AV; 3.0 L – G6AT, G6CT; 3.5 L – G6AU, G6CU.

The engine was installed on:

  • Hyundai Dynasty 1 (LX) in 1996 – 1999;
  • Hyundai Grandeur 2 (LX) in 1994 – 1996.


Production years 1994-1999
Displacement, cc 3497
Fuel system distributed injection
Power output, hp 225
Torque output, Nm 305
Cylinder block cast iron V6
Block head aluminum 24v
Cylinder bore, mm 93
Piston stroke, mm 85.8
Compression ratio 10.0
Features DOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 4.3
Fuel type petrol
Euro standards EURO 2
Fuel consumption, L/100 km (for Hyundai Dynasty 1997)
— city
— highway
— combined
Engine lifespan, km ~200 000
Weight, kg 199

Disadvantages of the Hyundai G6AU engine

  • The main problems of the engine are related to the quality of the assembly and its components;
  • On specialized forums, many cases of liners turning on a run of 50,000 km are described;
  • By 100,000 km, an oil burn of 1 liter per thousand km or more usually appears;
  • Hydraulic lifters and belt tensioner are not very large resource;
  • And here the engine speed often floats due to contamination of the throttle, idle speed controller or injectors.

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