Since 2019, the company has been assembling the 2.5-liter Hyundai G4KN SmartStream 2.5 GDI engine, which powers the Kia K5 as well as the Hyundai Sonata and Grandeur models. For both direct and distributed fuel injection, this engine has two rows of nozzles.
Theta 2.5L family: G4KM, G4KN, G4KP, G4KR.
The engine was mounted on:
- Hyundai Grandeur 6 (IG) since 2019;
- Hyundai Sonata 8 (DN8) since 2019;
- Kia K5 3 (DL3) since 2019;
- Kia Sportage 5 (NQ5) since 2021.
Specifications
| Production years | since 2019 |
| Displacement, cc | 2497 |
| Fuel system | GDi + MPI |
| Power output, hp | 194 |
| Torque output, Nm | 246 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 88.5 |
| Piston stroke, mm | 101.5 |
| Compression ratio | 13.0 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on all shafts |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Kia K5 2020) — city — highway — combined |
10.4 5.2 7.1 |
| Engine lifespan, km | ~250 000 |
Disadvantages of the Hyundai G4KN engine
The presence of a second row of nozzles should solve the issue of valve coking; this motor was only recently installed, and there are currently no statistics on its malfunctions;
The catalyst’s crumbs may enter the combustion chamber because it is near the block;
The source of the adjustable oil pump and electronic thermostat is still unknown;
The engine has hydraulic compensators, which are sensitive to lubricant quality.