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.
Sigma family:
2.5 L – G6AV;
3.0 L – G6AT, G6CT;
3.5 L – G6AU, G6CU.
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 |
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.
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.
Frequently asked questions about the Hyundai-Kia G6CT
How much power does the Hyundai-Kia G6CT make?
The Hyundai-Kia G6CT develops 185 - 205 hp and 250 - 280 Nm of torque.
How much oil does the Hyundai-Kia G6CT take and which one?
Engine oil capacity: 4.6 liters. Recommended oil: 5W-40.
Does the Hyundai-Kia G6CT have a timing belt or chain?
The Hyundai-Kia G6CT uses a timing belt.
Is the Hyundai-Kia G6CT turbocharged?
No, the Hyundai-Kia G6CT is naturally aspirated.
Does the Hyundai-Kia G6CT need valve clearance adjustment?
No, the Hyundai-Kia G6CT has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Hyundai-Kia G6CT last?
The typical lifespan of the Hyundai-Kia G6CT is ~250 000 km with proper maintenance.
What is the fuel consumption of the Hyundai-Kia G6CT?
Hyundai Grandeur 2000: city 16.9, highway 9.6, combined 12.3 L/100 km.
What cars was the Hyundai-Kia G6CT 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.
What are the common problems of the Hyundai-Kia G6CT?
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. All known problems.
