Engine Hyundai-Kia G4HC

The 1.0-liter Hyundai G4HC gasoline engine was produced by the concern from 1997 to 2003 and was installed on compact Atos and Atos Prime models, as well as their clones Amica and Kia Visto. There were two versions of this engine: with a conventional distributor and a non-contact ignition system.

Epsilon family: G3HA, G4HA, G4HC, G4HE, G4HD, G4HG.

The engine was installed on:

  • Hyundai Atos 1 (MX) in 1997 – 2003.


Production years 1997-2003
Displacement, cc 999
Fuel system distributed injection
Power output, hp 54 (G4HC with distributor)
55 – 58 (G4HC-E with DLI)
Torque output, Nm 73 (G4HC with distributor)
82 – 84 (G4HC-E with DLI)
Cylinder block cast iron R4
Block head aluminum 12v
Cylinder bore, mm 66
Piston stroke, mm 73
Compression ratio 9.5 (G4HC with distributor)
9.7 (G4HC-E with DLI)
Features SOHC
Hydraulic lifters no
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-40
Engine oil capacity, liter 3.1
Fuel type petrol
Euro standards EURO 2 (G4HC with distributor)
EURO 3 (G4HC-E with DLI)
Fuel consumption, L/100 km (for Hyundai Atos 2000)
— city
— highway
— combined
Engine lifespan, km ~200 000
Weight, kg 83.9

Disadvantages of the Hyundai G4HC engine

  • This is not a very resourceful engine, but it has no big problems in terms of reliability;
  • The main reason for floating engine speed is contamination of the throttle or idle speed controller;
  • Also, the insulation of the wiring often cracks here and the motor simply starts to triple;
  • Due to the weak tension, the alternator belt constantly flies, it is necessary to modify;
  • Closer to 200,000 km, the unit asks for capital, since there are repair dimensions.

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