Mitsubishi Saturn engine

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Mitsubishi Saturn engine
Overview
Manufacturer	Mitsubishi Motors
Also called	4G3
Production	1969–1999
Layout
Configuration	Straight-4 & Straight-6
Displacement	1.2–2.0 L (1,239–1,994 cc)
Cylinder bore	73 mm (2.87 in) 74.5 mm (2.93 in) 77 mm (3.03 in) 79 mm (3.11 in) 80.6 mm (3.17 in)
Piston stroke	74 mm (2.91 in) 77 mm (3.03 in) 86 mm (3.39 in)
Cylinder block material	Cast iron
Cylinder head material	Aluminium
Valvetrain	SOHC & DOHC, 2 valves x cyl.
Compression ratio	9.5:1
Combustion
Turbocharger	On G32B & 4G32T
Fuel system	Mikuni-built Solex carburetor Central-point EFI
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	37–115 hp (28–86 kW)

The Mitsubishi Saturn or 4G3 engine is series of overhead camshaft (OHC) straight-four internal combustion engines introduced by Mitsubishi Motors and saw first service in the 1969 Colt Galant. Displacement ranges from 1.2 to 1.8 L (1,239 to 1,755 cc), although there was also a rare 2-litre (1,994 cc) inline-six version built from 1970 until 1976. The early versions have chain driven valvetrain while the later versions are belt driven and equipped with balance shafts.