The Most Common 1.6 Mitsubishi 4G18 Engine Problems

The 4G18 engine is the largest of the 4-cylinder injection engines in the Mitsubishi Orion lineup. Volume – 1.6 liters, runs on gasoline.

The internal combustion engine was produced from 1998 to 2015 and was installed on the market primarily on the Lancer model. On the basis of the 4G18 engine, other engines of the 4G series were later assembled.

The engine has a timing belt, a multipoint fuel injection system. One of the differences from the younger models 4G13 and 4G15 is the presence of a long-stroke crankshaft in the 4G18 design – the stroke is 87.3 mm compared to 82 mm for the younger models.

In addition, the block is bored out for a 76 mm piston. The engine block itself is made of cast iron, the cylinder head is made of aluminum, and the intake manifold is made of duralumin.

Read Also: The Most Common 1.5 Mitsubishi 4G15 Engine Problems

4G18 Engine Specifications

Volume (cm3)1584
Power (hp)98-112
Torque145 – 150 Nm
Timing driveBelt
Environmental classEuro 3/4
Fuel typeGasoline AI-92
ICE featuresSOHC
Supply systemInjector
Hydraulic liftersNot
Cylinder blockCast iron R4
Cylinder headAluminum 16v
Cylinder diameter76 mm
piston stroke87.3 mm
Compression ratio9-10
Phase regulatorNot
Engine oil3.3L 5W-30
Average resource300,000 km

Advantages And Reliability of the 4G18 Engine

The design of the engine has hydraulic compensators that free the car owner from constant valve adjustment. According to the general impression, the design of the engine is simple and maintainable.

And the presence of a fuel injection system ensures a reduction in fuel consumption while maintaining technical characteristics.

Disadvantages and problems of the 4G18 engine

The 4G18 model is described by motorists as quite reliable and economical in terms of fuel. But the engine also has certain disadvantages.

  1. The main fault of 4G18 Engine is high oil consumption already after 100,000 km of run. Often there is rapid wear of the throttle valve.
  2. The next typical malfunction of 4G18 Engine is filling candles at low temperatures.
  3. The belt drive can break the manufacturer’s previously specified 90,000 km when it is replaced, resulting in bent valves.
  4. In addition, the thermostat, fuel pump and engine mounts are characterized by a low resource.

Applicability of The 4G18 engine

  • Mitsubishi : Colt Plus (2007-2013), Space Star (1998-2005), Lancer (2002-2007), Kuda (1999-2005)
  • Proton : Waja (2001-2011)

Tuning prospects of The 4G18 Engine

4G18 engine is tuned in much the same way as the 4G15 model. The surest option for tuning would be to buy a turbo kit with the subsequent installation of a turbocharger. But this method comes at a cost.

The second option will be more budgetary – the purchase and implementation of a 4G63 contract engine from Mitsubishi Lancer Evolution.

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