Mitsubishi Lancer Evolution 7. Manual — part 225
INTAKE AND EXHAUST -
Turbocharger
15-25
COMPRESSOR COVER
Check the compressor cover for traces of contact with the
compressor wheel and other damage.
TURBINE WHEEL ASSEMBLY
1. Check the turbine and compressor wheel blades for bend,
burr, damage, corrosion and traces of contact on the
back side and replace if defective.
2. Check the oil passage of the turbine wheel assembly
for deposit and clogging.
3. In the case of water cooled type, check also the water
passage for deposit and clogging.
4. Check the turbine wheel and compressor wheel for light
and smooth turning.
Oil passage
Turbine wheel
Water passage
Compressor
wheel
INTAKE AND EXHAUST -
Exhaust Pipe and Main Muffler
15-26
EXHAUST PIPE AND MAIN MUFFLER
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
D
Under Cover Removal and Installation (Refer to GROUP 51 - Front Bumper.)
D
Crossmember Bar Removal and Installation (Refer to GROUP 32 - Engine Roll Stopper, Centermember.)
9
1
2
3
5
8
11
6
12
10
3
7
12
13 ± 2 N·m
50 ± 5 N·m
13 ± 2 N·m
49 ± 10 N·m
59 ± 10 N·m
13 ± 2 N·m
45 ± 5 N·m
4
Exhaust main muffler removal steps
1. Exhaust main muffler
2. Exhaust pipe gasket
3. Exhaust muffler hanger
Center exhaust pipe removal steps
A
A"
4. Oxygen sensor
5. Center exhaust pipe
2. Exhaust pipe gasket
6. Exhaust pipe gasket
7. Exhaust pipe hanger
Front exhaust pipe removal steps
8. Exhaust pipe gasket
9. Spring
10. Front exhaust pipe
11. Seal ring
12. Exhaust pipe hanger
REMOVAL SERVICE POINT
A
A" OXYGEN SENSOR REMOVAL
Use special tool to remove the oxygen sensor.
MD998770
Oxygen sensor
16-1
ENGINE
ELECTRICAL
CONTENTS
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Alternator Output Line Voltage Drop Test
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Waveform Check Using An Analyzer
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Ignition Coil (With Built-in Power Transistor)
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Spark Plug Check, Cleaning and Replacement 29
Camshaft Position Sensor Check
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Waveform Check Using An Analyzer
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ENGINE ELECTRICAL -
Charging System
16-2
CHARGING SYSTEM
GENERAL INFORMATION
The charging system uses the alternator output
to keep the battery charged at a constant level
under various electrical loads.
OPERATION
Rotation of the excited field coil generates AC voltage in
the stator.
This alternating current is rectified through diodes to DC
voltage having a waveform shown in the illustration at left.
The average output voltage fluctuates slightly with the
alternator load condition.
When the ignition switch is turned on, current flows
in the field coil and initial excitation of the field
coil occurs.
When the stator coil begins to generate power after
the engine is started, the field coil is excited by
the output current of the stator coil.
The alternator output voltage rises as the field
current increases and it falls as the field current
decreases. When the battery voltage (alternator
S terminal voltage) reaches a regulated voltage
of approximately 14.4 V, the field current is cut
off. When the battery voltage drops below the
regulated voltage, the voltage regulator regulates
the output voltage to a constant level by controlling
the field current.
In addition, when the field current is constant, the
alternator output voltage rises as the engine speed
increases.
SYSTEM DIAGRAM
Stator coil
Field coil
Voltage
regulator
Engine-ECU
Charging
warning lamp
Ignition
switch
Battery
B
G
L
FR
S
Voltage
Time
Approximately
14.4 V
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