Mitsubishi 4G18 engine
|Cylinder block alloy||Cast-iron|
4 valves per cylinder
|Piston stroke, mm (inch)||87.3 (3.44)|
|Cylinder bore, mm (inch)||76 (2.99)|
|Displacement||1584 cc (96.7 cu in)
|Power output||72 kW (98 HP) at 6,000 rpm
73.5 kW (100 HP) at 6,000 rpm
73.5 kW (102 HP) at 6,000 rpm
79 kW (107 HP) at 6,000 rpm
82 kW (112 HP) at 6,000 rpm
90 kW (122 HP) at 6,000 rpm
|Torque output||150 Nm (111 lb·ft) at 4,000 rpm
133 Nm (98 lb·ft) at 4,500 rpm
140 Nm (103 lb·ft) at 2,750 rpm
138 Nm (102 lb·ft) at 3,000 rpm
149 Nm (110 lb·ft) at 4,500 rpm
156 Nm (115 lb·ft) at 4,500 rpm
|HP per liter||62
|Weight, kg (lbs)||115 (254)|
|Fuel consumption, L/100 km (mpg)
|Turbocharger|| Naturally aspirated
|Oil consumption , L/1000 km
(qt. per miles)
|up to 1.0
(1 qt. per 600 miles)
|Recommended engine oil||5W-20
|Engine oil capacity, L (qt.)||3.3 (3.5)
|Oil change interval, km (miles)||5,000-10,000
|Normal engine operating temperature, °C (F)||–|
|Engine lifespan, km (miles)
200,000 – 250,000 (120,000 – 150,000)
-No life span loss
|The engine is installed in||Mitsubishi Colt
Mitsubishi Space Star
MPM Motors PS160
In this article, we will talk about the largest Mitsubishi Orion engine with the displacement of 1.6 liters, designated as 4G18. It has a cast-iron cylinder block with a bore of 76 mm and a stroke of 87.3 mm. This allows increasing capacity to 1.584 liters.
This cylinder block is covered with a SOHC 16-valve head with hydraulic tappets in almost all modifications, so there’s no need for valve adjustment. It also has a timing belt with a service life of 60000 miles (90,000 km). If it breaks off, the valves will be destroyed. Replace it on time.
This engine is as simple as any other Mitsubishi Orion — it doesn’t have a MIVEC system and other modern accessories.
The firing order is 1-3-4-2.
In 2010, the MMC Company started producing the next generation of this engine, which was named Mitsubishi 4A92.
Mitsubishi 4G18 engine problems and malfunctions
The main problems of the 4G18 engines are the same as those of the 1.5 liter 4G15 (won’t start, vibration, etc.). You can learn more about them HERE.
However, the 4G18 also has its problem — high oil consumption. This happens because piston rings wear fast. They last for about 60,000 miles (90,000 km). The cooling system is not perfect, either, which leads to failure of valve stem seals or the formation of cylinder wall scratches.
High oil consumption is a classic problem of all 4G18’s.
Engine number location
The number is located on the exhaust side under the manifold.
Mitsubishi 4G18 engine tuning
This engine is almost the same as the 4G15, so you can take advantage of the advice for boosting power from THIS ARTICLE. The result will be the same. However, instead of a performance upgrade, it would be better to buy a turbocharged 4G15 MIVEC and get a ready powerful engine.