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Mitsubishi 4G9 User Manual

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4G9 ENGINE (E–W) – 
General Information
11A-0-5
PWEE9502-C
E
July 1997
Mitsubishi Motors Corporation
Revised
4G94
Descriptions
4G94–SOHC
4G94–DOHC–GDI
Type
In-line OHV, SOHC
In-line OHV, DOHC
Number of cylinders
4
4
Combustion chamber
Pentroof type
Pentroof type
Total displacement dm
3
1,999
1,999
Cylinder bore mm
81.5
81.5
Piston stroke mm
95.8
95.8
Compression ratio
9.5
10.6
Valve timing
Intake
valve
Opens
(BTDC)
2
_
15
_
Closes
(ABDC)
58
_
51
_
Exhaust
valve
Opens
(BBDC)
58
_
55
_
Closes
(ATDC)
10
_
15
_
Lubrication system
Pressure feed, full-flow filtration
Pressure feed, full-flow filtration
Oil pump type
Trochoid type
Trochoid type
Cooling system
Water-cooled forced circulation
Water-cooled forced circulation
Water pump type
Centrifugal impeller type
Centrifugal impeller type
PWEE9502-I
E
Mar. 2001
Mitsubishi Motors Corporation
Revised