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 | petrol |
| 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.
