Mitsubishi Lancer (4A9 engine). Manual — part 22
GENERAL INFORMATION
ENGINE MECHANICAL <4A9>
11A-2
GENERAL INFORMATION
M1111000101962
Item
4A91
4A92
Total displacement mL
1,499
1,590
Bore
× Stroke mm
75.0
× 84.8
75.0
× 90.0
Compression ratio
10.5
11.0
Compression chamber
Pentroof
Camshaft arrangement
DOHC
Number of valve
Intake
8
Exhaust
8
Valve timing
Intake opening
BTDC 41
° − ATDC 9°
Intake closing
ABDC 11
° − ABDC 61°
Exhaust opening
BBDC 39
°
Exhaust closing
ATDC 5
°
Fuel system
Electronically controlled multipoint fuel injection
Rocker arm
Not equipped
Auto-lash adjuster
Not equipped
SERVICE SPECIFICATIONS
M1112000302768
Item
Standard value
Limit
Alternator and others belt tension (When
checked)
Vibration frequency Hz
140
− 171
−
Tension N
392
− 588
−
Deflection mm (Reference)
9.5
− 12.2
−
Alternator and others belt tension (When
adjusted)
Vibration frequency Hz
148
− 164
−
Tension N
441
− 539
−
Deflection mm (Reference)
10.2
− 11.5
−
Alternator and others belt tension (When
replaced)
Vibration frequency Hz
198
− 221
−
Tension N
784
− 980
−
Deflection mm (Reference)
6.3
− 7.6
−
Power steering oil pump drive belt tension
Vibration frequency Hz
(Reference)
108
− 221
−
Tension N (Reference)
169
− 720
−
Deflection mm (Reference)
18.2 or less
−
Basic ignition timing
5
° BTDC ± 3°
−
Ignition timing
Approximately
10
° BTDC
−
Idle speed r/min
750
± 100
−
CO contents %
0.3 or less
−
SEALANTS AND ADHESIVE
ENGINE MECHANICAL <4A9>
11A-3
SEALANTS AND ADHESIVE
M1112000502687
Item
Specified Sealant and adhesive
Remark
Timing chain tensioner cover
ThreeBond 1217G (Mitsubishi Genuine
Part No,1000A923), LOCTITE 5900,
LOCTITE 5970 or equivalent
Semi-drying sealant
Cylinder head cover assembly
Timing chain case assembly
Cylinder block
Cylinder head gasket
Engine oil pan
ThreeBond 1217G (Mitsubishi Genuine
Part No.1000A923), ThreeBond 1227D,
LOCTITE 5900, LOCTITE 5970 or
equivalent
Crankshaft rear oil seal case assembly
Flywheel bolt <M/T>
LOCTITE 2701 or equivalent
Anaerobic adhesive
Drive plate bolt <A/T>
LOCTITE 2701, ThreeBond 1324 or
equivalent
Timing chain case assembly (water
pump)
ThreeBond 1227D, ThreeBond 1207F
or equivalent
Semi-drying sealant
HC contents ppm
200 or less
−
Valve clearance (at cold) mm
Inlet valve
0.22
± 0.04
−
Exhaust valve
0.30
± 0.04
−
Compression pressure (at engine speed of 300 r/min) kPa <4A91>
1,550
Minimum
1,100
Compression pressure (at engine speed of 250 r/min) kPa <4A92>
1,550
Minimum
1,100
Compression pressure difference of all cylinders kPa
−
Maximum 98
Intake manifold vacuum kPa
−
Minimum 60
Cylinder head bolt outside diameter difference mm
0
− 0.15
−
Item
Standard value
Limit
SPECIAL TOOLS
ENGINE MECHANICAL <4A9>
11A-4
SPECIAL TOOLS
M1112000603074
Tool
Number
Name
Use
B992080
a
b
MB992080
a: MB992081
b: MB992082
Belt tension meter set
a: Belt tension meter
b: Microphone assembly
Drive belt tension check
MB991910
MB991826
MB991955
MB991911
MB991824
MB991827
MB991825
a
b
c
d
e
f
DO NOT USE
MB991955
a: MB991824
b: MB991827
c: MB991910
d: MB991911
e: MB991825
f: MB991826
M.U.T.-III sub assembly
a: Vehicle communication
interface (V. C. I.)
b: M.U.T.-III USB cable
c: M.U.T.-III main harness A
(Vehicles with CAN
communication system)
d: M.U.T.-III main harness B
(Vehicles without CAN
communication system)
e: M.U.T.-III adapter harness
f: M.U.T.-III trigger harness
CAUTION
For vehicles with CAN
communication, use M.U.T.-III
main harness A to send
simulated vehicle speed. If
you connect M.U.T.-III main
harness B instead, the CAN
communication does not
function correctly.
• Checking the ignition timing
• Checking the idle speed
B992276
MB992276
Drive belt remover
Power steering oil pump drive
belt removal
MB992858
SPECIAL TOOLS
ENGINE MECHANICAL <4A9>
11A-5
MB992858
Drive belt installer
Power steering oil pump drive
belt installation
B991992
MB991992
Torque wrench adaptor
Removal and installation of
V.V.T. sprocket assembly
mounting bolt
MD998772
MD998772
Valve spring compressor
Valve spring compression
B992090
MB992090
Retainer holder attachment
MB992089
Retainer holder C
MB992085
Valve stem seal pliers
Valve stem seal removal
B992677
MB992677
Valve stem seal installer
adjustable
Valve stem seal press-fitting
Tool
Number
Name
Use
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