Engine Hyundai G4CS

The 2.4-liter Hyundai G4CS engine was produced from 1986 to 2007 under license from Mitsubishi and was essentially a copy of the 8-valve version of the Japanese power unit under the 4G64 index. Basically, the motor was installed on the Starex minibus, but it is also found on passenger models.

Sirius family: 1.6 L – G4CR; 1.8 L – G4CN, G4CM, G4JN; 2.0 L – G4CP, G4JP; 2.4 L – G4JS, G4CS.

The engine was installed on:

  • Hyundai Grandeur 1 (L) in 1986 – 1992; Grandeur 2 (LX) in 1992 – 1998;
  • Hyundai Sonata 2 (Y2) in 1988 – 1991;
  • Hyundai Starex 1 (A1) in 1997 – 2007.


Production years 1986-2007
Displacement, cc 2351
Fuel system injector
Power output, hp 110 – 120
Torque output, Nm 180 – 200
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 86.5
Piston stroke, mm 100
Compression ratio 8.5 – 8.6
Features no
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 10W-40
Engine oil capacity, liter 4.3
Fuel type petrol
Euro standards EURO 1/2
Fuel consumption, L/100 km (for Hyundai Starex 2003)
— city
— highway
— combined
Engine lifespan, km ~300 000
Weight, kg 159.7 (without attachments)

Disadvantages of the Hyundai G4CS engine

  • The most famous engine problem is the low resource of timing belts and balancers.
  • Due to the vibration of the balancer shafts, the supports of the power unit are quickly destroyed.
  • The use of low-quality oils greatly affects the resource of hydraulic lifters.
  • At high mileage, the exhaust manifold bursts, but usually it can be welded.
  • Floating speeds are also common due to contamination of the throttle or idle speed controller.

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