The 1.0-liter Hyundai G3LF or Smartstream G 1.0 T-GDI engine has been produced since 2020 and is installed on such popular concern models as Kona, Bayon, as well as Kia Stonic, Ceed and Rio. This motor is usually produced as a Mild Hybrid 48V and is combined with an iMT manual transmission.
Kappa R3 family: G3LA, G3LB, G3LC, G3LD, G3LE, G3LF.
Specifications
| Production years | since 2020 |
| Displacement, cc | 998 |
| Fuel system | direct injection |
| Power output, hp | 120 |
| Torque output, Nm | 172 / 200 (with manual / robotic gearbox) |
| Cylinder block | aluminum R3 |
| Block head | aluminum 12v |
| Cylinder bore, mm | 71 |
| Piston stroke, mm | 84 |
| Compression ratio | 10.5 |
| Features | CVVD, Mild Hybrid 48V |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | Dual CVVT |
| Turbocharging | yes |
| Recommended engine oil | 0W-20 |
| Engine oil capacity, liter | 3.6 |
| Fuel type | petrol |
| Euro standards | EURO 6 |
| Fuel consumption, L/100 km (for Hyundai Kona 2022) — city — highway — combined |
6.0 4.7 5.2 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 86 |
The engine was installed on:
- Hyundai Bayon 1 (BC3) since 2021;
- Hyundai Kona 1 (OS) since 2020;
- Hyundai i20 3 (BC3) since 2020;
- Hyundai i30 3 (PD) since 2020;
- Kia Ceed 3 (CD) since 2021;
- Kia Rio 4 (YB) since 2020;
- Kia Stonic 1 (YB) since 2020.
Disadvantages of the Hyundai G3LF engine
- On specialized forums, they complain only about electrical glitches and especially about the Start-Stop system.
- This motor does not tolerate overheating, gaskets instantly tan and leaks begin.
- The timing chain does not differ in durability, sometimes it stretches even up to 100,000 km.
- Also, the owners note excessive engine vibrations and a small resource of its pillows.
