The 2.4-liter Hyundai G4KK engine or 2.4 MPi Hybrid was produced from 2011 to 2017 and was installed only on hybrid modifications of the American versions of the Hyundai Sonata and Kia Optima. Hybrids for the Asian market were equipped with a 2.0-liter Nu series unit under the G4NE index.
Theta 2.4L family: G4KC, G4KE, G4KG, G4KJ, G4KK.
The engine was installed on:
- Hyundai Grandeur 5 (HG) in 2011 – 2017;
- Hyundai Sonata 6 (YF) in 2011 – 2015;
- Kia Optima 3 (TF) in 2011 – 2015.
Specifications
| Production years | 2011-2017 |
| Displacement, cc | 2359 |
| Fuel system | distributed injection |
| Power output, hp | 169 209 (with electrical component) |
| Torque output, Nm | 212 265 (with electrical component) |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 88 |
| Piston stroke, mm | 97 |
| Compression ratio | 13.0 |
| Features | Atkinson cycle |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | Dual CVVT |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.6 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Hyundai Sonata Hybrid 2012) — city — highway — combined |
6.7 5.9 6.4 |
| Engine lifespan, km | ~270 000 |
Disadvantages of the Hyundai G4KK engine
- The main problems are not their reliability, but the shortage of specialists or spare parts;
- Most often, various electrical glitches and antifreeze leaks are discussed on the forums;
- The collector is located very close to the cylinder block and there are scuffs here;
- There are no hydraulic lifters, so valve clearances need to be adjusted periodically.
