The Hyundai G6AU, a 3.5-liter gasoline V6 engine, was only manufactured between 1994 and 1999 and was mounted on top modifications of the priciest Grandeur and Dynasty models. In essence, this power unit is a replica of the Mitsubishi 6G74 engine with 24 valves.
The 2.5 L G6AV, 3.0 L G6AT, G6CT, and 3.5 L G6AU, G6CU engines were also part of the Sigma family.
The engine was mounted on:
- Hyundai Dynasty 1 (LX) in 1996 – 1999;
- Hyundai Grandeur 2 (LX) in 1994 – 1996.
Specifications
| 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 |
17.2 10.5 12.7 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 199 |
Disadvantages of the Hyundai G6AU engine
The engine’s primary issues stem from the assembly’s and its parts’ poor quality;
Numerous instances of liners turning on a 50,000 km run are reported on specialized forums;
An oil burn of one liter per thousand kilometers or more typically occurs by 100,000 kilometers;
The engine speed frequently floats because of contamination of the throttle, idle speed controller, or injectors; hydraulic lifters and belt tensioners are not very large resources.