Mitsubishi 4G1 series, General Information Manual

Page: 8 / 147

4G1 ENGINE (E–W) –
General Information
11A-0-8
PWEE9520
E
Nov. 1995 Mitsubishi Motors Corporation
Descriptions 4G18 16-VALVE–CARBURETOR 4G18 16-VALVE–MPI
Type In-line OHV, SOHC In-line OHV, SOHC
Number of cylinders 4 4
Combustion chamber Pentroof type Pentroof type
Total displacement dm
3
1,584 1,584
Cylinder bore mm 76.0 76.0
Piston stroke mm 87.3 87.3
Compression ratio 9.5 9.5, 10*
1
*
2
Number of
valves Intake 8 8
valves
Exhaust 8 8
Valve timing Intake opens BTDC 12
_
BTDC 17
_
, BTDC 9
_
*
1
, BTDC 17
_
*
2
Intake closes ABDC 48
_
ABDC 39
_
, ABDC 51
_
*
1
, ABDC 43
_
*
2
Exhaust opens BBDC 48
_
BBDC 49
_
, BBDC 49
_
*
1
, BBDC 53
_
*
2
Exhaust closes ATDC 12
_
ATDC 7
_
, ATDC 15
_
*
1
, ATDC 7
_
*
2
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
*
1
: SPACE STAR for Europe
*
2
: LANCER for General Export
PWEE9520-E
E
Feb. 2001 Mitsubishi Motors Corporation Revised