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Mitsubishi Saturn engine

January 20, 2023

Not to be confused with Saturn I4 engine.

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.

Mitsubishi Saturn engine
Overview
ManufacturerMitsubishi Motors
Also called4G3
Production1969–1999
Layout
ConfigurationStraight-4 & Straight-6
Displacement1.2–2.0 L (1,239–1,994 cc)
Cylinder bore73 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 stroke74 mm (2.91 in)
77 mm (3.03 in)
86 mm (3.39 in)
Block materialCast iron
Head materialAluminium
ValvetrainSOHC & DOHC, 2 valves x cyl.
Compression ratio9.5:1
Combustion
TurbochargerOn G32B & 4G32T
Fuel systemMikuni-built Solex carburetor
Central-point EFI
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output37–115 hp (28–86 kW)

4G30

The 4G30 displaces 1.3 L (1,289 cc). It is an 8-valve SOHC design with an aluminium head and iron block. The engine has five main bearings. Power was 87 hp (65 kW).

Bore x Stroke: 73 mm × 77 mm (2.87 in × 3.03 in)

Applications

4G31

The 4G31 displaces 1.5 L (1,499 cc). It is an 8-valve SOHC design with an aluminium head and iron block. The engine has five main bearings. Power was 95–105 hp (71–78 kW) depending on which carburetor combo was used. An updated version with central-point electronic fuel injection was installed in Mirages and Lancers from 1986 on.[1] A version for industrial use has 37 PS (27 kW) at 3000 rpm.[2]

Bore x Stroke: 74.5 mm × 86 mm (2.93 in × 3.39 in)

Applications

4G32

In 1970, the 4G32 was introduced, and it displaces 1.6 L (1,597 cc). It is an eight-valve SOHC design with an aluminium head and iron block. The engine has five main bearings, a cross flow head and a single down draught carburetor. Firing order is 1-3-4-2. The GSR versions used two twin-barrel Mikuni-built Solex carburetors for a total of 110 hp (82 kW) (SAE).

 
4G32 ECI engine in a Mitsubishi Mirage

A version with an early iteration of Mitsubishi's MCA lean-burn system (MCA-IIB), fulfilling the intermediate Japanese exhaust regulations for 1975, was called G32A. This was built for less than one year, as the new MCA engine arrived in November 1975. Those with the later, cleaner yet, "MCA-Jet" system were called G32B. Later, the G32B also came in a fuel injected, turbocharged model. For competition, a version of the 4G32 engine was made with a DOHC eight-valve cylinder head, and fitted with two twin-choke 40 mm (1.6 in) Solex sidedraft carburettors.

Bore x Stroke: 77 mm × 86 mm (3.03 in × 3.39 in)

Applications:

4G32T

Turbocharged version of the 4G32.

4G33

The 4G3 displaces 1.4 L (1,440 cc) from a 73 mm × 86 mm (2.87 in × 3.39 in) bore and stroke. There was also an MCA-Jet equipped G33B developed to fulfill the 1978 Japanese emissions regulations.

Applications:

4G35

The 4G35 displaces 1.7 L (1,686 cc). It is an 8-valve SOHC design with an aluminium head and iron block. The engine has five main bearings. Power was 105–115 hp (78–86 kW) depending on which carburetor combo was used.

Bore x Stroke: 79 mm × 86 mm (3.11 in × 3.39 in)

Applications:

4G36

The 4G36 displaces 1.2 L (1,239 cc). 73 mm × 74 mm (2.87 in × 2.91 in) bore and stroke.

Applications:

4G37

The 8-valve SOHC 4G37 displaces 1.8 L (1,755 cc).

Bore x Stroke: 80.6 mm × 86 mm (3.17 in × 3.39 in)

Compression Ratio: 9.5:1

Applications:

By other brands:

6G34

The 6G34, referred to by Mitsubishi as the Saturn 6, is a 12-valve SOHC straight-6 of 2.0 L (1,994 cc) displacement.

The 6G34 was used only in the Mitsubishi Debonair Executive from September 1970 to June 1976, and saw very limited production. Effectively, the design was that of the standard Saturn four-cylinder block with two additional cylinders grafted on to replace the KE64.

Applications:

See also

 
Wikimedia Commons has media related to Mitsubishi 4G3 engines.

References

  1. ^ Büschi, Hans-Ulrich, ed. (5 March 1987). Automobil Revue 1987 (in German and French). Vol. 82. Berne, Switzerland: Hallwag AG. pp. 397–398. ISBN 3-444-00458-3.
  2. ^ 自動車ガイドブック: Japanese motor vehicles guide book 1973/1974 (in Japanese), vol. 20, Japan: Japan Automobile Manufacturers Association, 30 October 1973, p. 298
  3. ^ Mastrostefano, Raffaele, ed. (1990). Quattroruote: Tutte le Auto del Mondo 1990 (in Italian). Milano: Editoriale Domus S.p.A. pp. 200–201.
  • "Engine Epic Part 8 - Mitsubishi Engines", Michael Knowling, Autospeed, issue 48, 21 September 1999

January 20, 2023
mitsubishi, saturn, engine, confused, with, saturn, engine, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, ne. Not to be confused with Saturn I4 engine This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Mitsubishi Saturn engine news newspapers books scholar JSTOR November 2018 Learn how and when to remove this template message 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 Mitsubishi Saturn engineOverviewManufacturerMitsubishi MotorsAlso called4G3Production1969 1999LayoutConfigurationStraight 4 amp Straight 6Displacement1 2 2 0 L 1 239 1 994 cc Cylinder bore73 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 stroke74 mm 2 91 in 77 mm 3 03 in 86 mm 3 39 in Block materialCast ironHead materialAluminiumValvetrainSOHC amp DOHC 2 valves x cyl Compression ratio9 5 1CombustionTurbochargerOn G32B amp 4G32TFuel systemMikuni built Solex carburetorCentral point EFIFuel typeGasolineCooling systemWater cooledOutputPower output37 115 hp 28 86 kW Contents 1 4G30 1 1 Applications 2 4G31 2 1 Applications 3 4G32 3 1 4G32T 4 4G33 5 4G35 6 4G36 7 4G37 8 6G34 9 See also 10 References4G30 EditThe 4G30 displaces 1 3 L 1 289 cc It is an 8 valve SOHC design with an aluminium head and iron block The engine has five main bearings Power was 87 hp 65 kW Bore x Stroke 73 mm 77 mm 2 87 in 3 03 in Applications Edit 1969 12 1971 09 Mitsubishi Galant A I A51 4G31 EditThe 4G31 displaces 1 5 L 1 499 cc It is an 8 valve SOHC design with an aluminium head and iron block The engine has five main bearings Power was 95 105 hp 71 78 kW depending on which carburetor combo was used An updated version with central point electronic fuel injection was installed in Mirages and Lancers from 1986 on 1 A version for industrial use has 37 PS 27 kW at 3000 rpm 2 Bore x Stroke 74 5 mm 86 mm 2 93 in 3 39 in Applications Edit 1969 12 1971 09 Mitsubishi Galant A II A III A52 1986 1987 Mitsubishi Mirage Mitsubishi FG20 Forklift4G32 EditIn 1970 the 4G32 was introduced and it displaces 1 6 L 1 597 cc It is an eight valve SOHC design with an aluminium head and iron block The engine has five main bearings a cross flow head and a single down draught carburetor Firing order is 1 3 4 2 The GSR versions used two twin barrel Mikuni built Solex carburetors for a total of 110 hp 82 kW SAE 4G32 ECI engine in a Mitsubishi Mirage A version with an early iteration of Mitsubishi s MCA lean burn system MCA IIB fulfilling the intermediate Japanese exhaust regulations for 1975 was called G32A This was built for less than one year as the new MCA engine arrived in November 1975 Those with the later cleaner yet MCA Jet system were called G32B Later the G32B also came in a fuel injected turbocharged model For competition a version of the 4G32 engine was made with a DOHC eight valve cylinder head and fitted with two twin choke 40 mm 1 6 in Solex sidedraft carburettors Bore x Stroke 77 mm 86 mm 3 03 in 3 39 in Applications Mitsubishi Celeste Mitsubishi Galant Mitsubishi L200 Mitsubishi L300 1973 02 1979 03 Mitsubishi Lancer A73A 1977 06 1979 03 Mitsubishi Lancer A144A G32B 1975 03 1979 06 Mitsubishi Lancer Celeste A73A 1975 03 1975 11 Mitsubishi Lancer Celeste A77A G32A 1977 07 1981 07 Mitsubishi Lancer Celeste A144 G32B 1980 1987 Mitsubishi Lancer EX A174A Mitsubishi Galant Lambda Sapporo Mitsubishi Sigma Mitsubishi Sapporo Mitsubishi Cordia Mitsubishi Tredia Mitsubishi Mirage Dodge Colt Eagle Vista Turbo 3 Hyundai Pony Hyundai Stellar Mazda Familia Plymouth Arrow 4G32T Edit Turbocharged version of the 4G32 4G33 EditThe 4G3 displaces 1 4 L 1 440 cc from a 73 mm 86 mm 2 87 in 3 39 in bore and stroke There was also an MCA Jet equipped G33B developed to fulfill the 1978 Japanese emissions regulations Applications Mitsubishi Celeste 1979 06 1989 01 Mitsubishi Delica Mitsubishi Galant 1973 02 1977 06 Mitsubishi Lancer A72A 1977 06 1978 04 Mitsubishi Lancer A143A G33B 1973 09 1979 03 Mitsubishi Lancer A72V 1975 03 1977 06 Mitsubishi Lancer Celeste A72A 1977 07 1978 03 Mitsubishi Lancer Celeste A143 G33B Hyundai Pony Hyundai Stellar Plymouth Arrow Mitsubishi FG15T Forklift 1979 4G35 EditThe 4G35 displaces 1 7 L 1 686 cc It is an 8 valve SOHC design with an aluminium head and iron block The engine has five main bearings Power was 105 115 hp 78 86 kW depending on which carburetor combo was used Bore x Stroke 79 mm 86 mm 3 11 in 3 39 in Applications 1973 01 1973 06 Mitsubishi Galant GS A55 1972 02 1976 Mitsubishi Galant GTO A55C 4G36 EditThe 4G36 displaces 1 2 L 1 239 cc 73 mm 74 mm 2 87 in 2 91 in bore and stroke Applications Mitsubishi Celeste Mitsubishi Colt Mitsubishi Lancer4G37 EditThe 8 valve SOHC 4G37 displaces 1 8 L 1 755 cc Bore x Stroke 80 6 mm 86 mm 3 17 in 3 39 in Compression Ratio 9 5 1Applications Mitsubishi Chariot Space Wagon 1983 91 Mitsubishi Cordia Mitsubishi Galant Mitsubishi Eclipse 1990 1994 Mitsubishi Lancer Lancer Fiore Mirage 4WD only Mitsubishi TrediaBy other brands Eagle Talon DL 1993 1994 Plymouth Laser 1990 19946G34 EditThe 6G34 referred to by Mitsubishi as the Saturn 6 is a 12 valve SOHC straight 6 of 2 0 L 1 994 cc displacement The 6G34 was used only in the Mitsubishi Debonair Executive from September 1970 to June 1976 and saw very limited production Effectively the design was that of the standard Saturn four cylinder block with two additional cylinders grafted on to replace the KE64 Applications Mitsubishi Debonair 1970 09 1976 06 Japan only See also Edit Wikimedia Commons has media related to Mitsubishi 4G3 engines List of Mitsubishi engines List of Hyundai engines List of engines used in Chrysler productsReferences Edit Buschi Hans Ulrich ed 5 March 1987 Automobil Revue 1987 in German and French Vol 82 Berne Switzerland Hallwag AG pp 397 398 ISBN 3 444 00458 3 自動車ガイドブック Japanese motor vehicles guide book 1973 1974 in Japanese vol 20 Japan Japan Automobile Manufacturers Association 30 October 1973 p 298 Mastrostefano Raffaele ed 1990 Quattroruote Tutte le Auto del Mondo 1990 in Italian Milano Editoriale Domus S p A pp 200 201 Engine Epic Part 8 Mitsubishi Engines Michael Knowling Autospeed issue 48 21 September 1999 Retrieved from https en wikipedia org w index php title Mitsubishi Saturn engine amp oldid 1109622347, wikipedia, wiki, book, books, library,

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