From 2011 to 2017, only hybrid versions of the American Hyundai Sonata and Kia Optima were equipped with the 2.4-liter Hyundai G4KK engine, also known as the 2.4 MPi Hybrid. Under the G4NE index, 2.0-liter Nu series engines were installed in hybrids intended for the Asian market.
G4KC, G4KE, G4KG, G4KJ, and G4KK are members of the Theta 2.4L family.
The engine was mounted 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 lack of experts or replacement parts is the primary issue, not their dependability;
On the forums, different electrical issues and antifreeze leaks are most frequently discussed;
Due to the collector’s proximity to the cylinder block and the presence of scuffs, valve clearances must be periodically adjusted because there are no hydraulic lifters.