The eighth generation Sonata and the fourth generation Kia Sorento crossover are equipped with the Hyundai G4KM SmartStream 2.5 MPI 2.5-liter gasoline engine, which has been put together since 2019. The unit has multiport fuel injection and is a member of the new Theta III family.
Theta 2.5L family: G4KM, G4KN, G4KP, and G4KR.
The engine was mounted on:
- Hyundai Sonata 8 (DN8) since 2019;
- Kia Sorento 4 (MQ4) since 2020.
Specifications
| Production years | since 2019 |
| Displacement, cc | 2497 |
| Fuel system | distributed injection |
| Power output, hp | 180 |
| Torque output, Nm | 232 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 88.5 |
| Piston stroke, mm | 101.5 |
| Compression ratio | 10.5 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | at inlet and outlet |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.9 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Hyundai Sonata 2020) — city — highway — combined |
11.4 5.5 7.7 |
| Engine lifespan, km | ~250 000 |
Disadvantages of the Hyundai G4KM engine
Since this engine is new, data on its malfunctions has not yet been gathered;
The most frequent complaints regarding oil consumption from the first kilometer have been made on specialized forums thus far;
Because the catalyst is near the block, its crumbs may enter the combustion chamber;
Let’s examine the features of an electronic thermostat and an adjustable oil pump.
The hydraulic lifters in this motor are sensitive to the oil’s quality.