Engine Hyundai-Kia G6CT

The Hyundai G6CT 3.0-liter V6 gasoline engine was produced by the company from 1990 to 2006 and installed on such models as the Grandeur, Dynasty, Starex and Kia Opirus of the first years of production. In fact, this power unit is a clone of the 24-valve version of the Mitsubishi 6G72 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 – 2005;
  • Hyundai Equus 1 (LZ) in 1999 – 2005;
  • Hyundai Grandeur 1 (L) in 1990 – 1992; Grandeur 2 (LX) in 1992 – 1998; Grandeur 3 (XG) in 1998 – 2005;
  • Hyundai Starex 1 (A1) in 1999 – 2003;
  • Kia Opirus 1 (GH) in 2003 – 2006.

Specifications

Production years 1990-2006
Displacement, cc 2972
Fuel system distributed injection
Power output, hp 185 – 205
Torque output, Nm 250 – 280
Cylinder block cast iron V6
Block head aluminum 24v
Cylinder bore, mm 91.1
Piston stroke, mm 76
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 4.6
Fuel type 92
Euro standards EURO 2/3
Fuel consumption, L/100 km (for Hyundai Grandeur 2000)
— city
— highway
— combined
16.9
9.6
12.3
Engine lifespan, km ~250 000
Weight, kg 191.9

Disadvantages of the Hyundai G6CT engine

  • In the early years, the build quality of motors and some of their components was very poor.
  • Many cases of engine wedge due to cranking of liners for 50,000 km are described.
  • Then the quality increased and now most of the complaints are related to oil consumption.
  • Also, engine speed often floats due to contamination of the throttle, injectors or idle speed controller.
  • Weaknesses include the ignition system and short-lived hydraulic lifters.

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