Engine Hyundai-Kia G4NB

The 1.8-liter Hyundai G4NB engine was produced at the Ulsan plant from 2010 to 2016 and was installed only on a few popular models, such as the Elantra and Cerato Forte. In 2013, the production of the motor was transferred to China, where it is put on the local Mistra model.

In 2010, Hyundai-Kia introduced a new line of gasoline engines with the Nu index, which consisted of engines of 1.8 and 2.0 liters, differing only in the piston stroke. By design, this is a classic motor for that time with an aluminum cylinder block, an aluminum 16-valve cylinder head with hydraulic compensators, a timing chain drive, MPi distributed fuel injection and CVVT phase shifters on two camshafts. The unit also received a plastic intake manifold with a VIS geometry change system.

All the most serious problems of the engine were due to the peculiarities of its design: the aluminum block of the unit with an open cooling jacket and thin cast-iron liners did not have high rigidity, which eventually leads to an ellipse of cylinders and an oil burner. And too close the location of the catalytic converter to the engine block often results in crumbs of the collapsing catalyst getting into the combustion chambers and the appearance of scoring in the cylinders.

The Nu family includes engines: G4NB, G4NA, G4NC, G4ND, G4NE, G4NH, G4NG, G4NL, G4NN.

The engine was installed on:

  • Hyundai Elantra 5 (MD) in 2010 – 2016;
  • Hyundai i30 2 (GD) in 2011 – 2016;
  • Kia Cerato 3 (YD) in 2012 – 2016.


Production years 2010-2016
Displacement, cc 1797
Fuel system distributed injection
Power output, hp 150
Torque output, Nm 178
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 81
Piston stroke, mm 87.2
Compression ratio 10.3
Features VIS
Hydraulic lifters yes
Timing drive chain
Phase regulator CVVT
Turbocharging no
Recommended engine oil 5W-20, 5W-30
Engine oil capacity, liter 4.5
Fuel type petrol
Euro standards EURO 4/5
Fuel consumption, L/100 km (for Hyundai Elantra 2012)
— city
— highway
— combined
Engine lifespan, km ~300 000
Weight, kg 112

Disadvantages of the Hyundai G4NB engine

  • Most of all, the engines of this family are scolded for the frequent occurrence of scuffing in the cylinders. For the sake of quick warm-up, the catalytic converter was placed too close to the engine block, and when the crumbs from the catalyst clog it, they begin to be sucked into the combustion chambers.
  • The appearance of a large oil consumption does not always indicate seizures in the cylinders, because an aluminum block with thin-walled cast-iron liners can simply lead and then a strong ellipse of cylinders and an oil burner accompanying this process will appear.
  • The timing drive here is carried out by a thin plate chain with a resource of 120,000 km, but if the engine is not often turned, then you can drive about twice as much without replacement. A stretched chain usually does not break, but jumps one tooth and often bends the valves.
  • Also, owners often complain about oil or antifreeze leaks due to weak gaskets and a very modest resource of the water pump, generator and other attachments.

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