The Hyundai G4KM SmartStream 2.5 MPI 2.5-liter gasoline engine has been assembled since 2019 and is installed on the eighth generation Sonata and the fourth generation Kia Sorento crossover. The unit belongs to the new Theta III family and is equipped with multiport fuel injection.
Theta 2.5L family: G4KM, G4KN, G4KP, G4KR, G4KS.
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 |
The engine was installed on:
- Hyundai Sonata 8 (DN8) since 2019;
- Kia Sorento 4 (MQ4) since 2020.
Disadvantages of the Hyundai G4KM engine
- This engine has just appeared and the statistics of its malfunctions have not yet been collected;
- So far, on specialized forums, the most active complain about oil consumption from the first km;
- The catalyst is located close to the block, its crumbs can get into the combustion chamber;
- Let’s look at the resource of an adjustable oil pump, as well as an electronic thermostat;
- This motor is equipped with hydraulic lifters, which are picky about the quality of the oil.
Frequently asked questions about the Hyundai-Kia G4KM
How much power does the Hyundai-Kia G4KM make?
The Hyundai-Kia G4KM develops 180 hp and 232 Nm of torque.
How much oil does the Hyundai-Kia G4KM take and which one?
Engine oil capacity: 5.9 liters. Recommended oil: 5W-30.
Does the Hyundai-Kia G4KM have a timing belt or chain?
The Hyundai-Kia G4KM uses a timing chain.
Is the Hyundai-Kia G4KM turbocharged?
No, the Hyundai-Kia G4KM is naturally aspirated.
Does the Hyundai-Kia G4KM need valve clearance adjustment?
No, the Hyundai-Kia G4KM has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Hyundai-Kia G4KM last?
The typical lifespan of the Hyundai-Kia G4KM is ~250 000 km with proper maintenance.
What is the fuel consumption of the Hyundai-Kia G4KM?
Hyundai Sonata 2020: city 11.4, highway 5.5, combined 7.7 L/100 km.
What cars was the Hyundai-Kia G4KM installed on?
Hyundai Sonata 8 (DN8) since 2019; Kia Sorento 4 (MQ4) since 2020.
What are the common problems of the Hyundai-Kia G4KM?
This engine has just appeared and the statistics of its malfunctions have not yet been collected. So far, on specialized forums, the most active complain about oil consumption from the first km. All known problems.
