2007 MITSUBISHI LANCER EVOLUTION engine coolant

ENGINE COOLING -On-vehicle Service14-9
5. Connect the special tool (MB991658) to the harness side
of the engine coolant temperature sensor connector.
6. Connect the special tool [MB991791(APS)] to the special
tool (MB991658).
7. Start the engine and let it run at idle.
NOTE
Since the resistance value of the special tool (APS)
indicates a low engine coolant temperature, engine speed
increases.
8. When the lever of the special tool (APS) is turned to
the end, check that the engine speed decreases and
the radiator fan motor rotates.
9. When the lever of the special tool (APS) is turned to
the reverse direction, check that the voltage between
terminals of the radiator fan motor connector gradually
decreases from the battery voltage to 0 V.
10. If inoperable, replace the radiator fan controller.
(Refer to P.14-15.)
11. Install the center under cover.
(Refer to GROUP 51 - Front Bumper.)
12. Connect the engine coolant temperature sensor
connector.

1. Remove the center under cover.
(Refer to GROUP 51 - Front Bumper.)
2. Insert the special tool at the back of the radiator fan
motor connector.
3. Connect the special tool to the circuit tester.
4. Start the engine and run it at idle.
5. Turn the A/C switch to the ON position and hold the
engine coolant temperature at 80_C or lower.
6. When the voltage between the terminals of the radiator
fan motor connector, the following values of (1) - (3)
can be detected at random.
(1) 0 V
(2) 8.22.6 V
(3) Battery voltage2.6 V
7. If inoperable, replace the radiator fan controller.
(Refer to P.14-15.)
8. Install the center under cover.
(Refer to GROUP 51 - Front Bumper.)
Engine coolant
temperature sensor
connector
(harness side)
MB991791(APS)
MB991658
MB991658Lever
MB991791(APS)
Radiator fan
controller
MB991222
Circuit tester
Connector
rear view

ENGINE COOLING -ThermostatENGINE COOLING -Thermostat14-11
THERMOSTAT
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
DEngine Coolant Draining and Supplying (Refer to P.14-6.)
DAir Duct Assembly Removal and Installation (Refer to GROUP 15 - Air Cleaner.)
DVacuum Pipe, Secondary Air Pipe Assembly Removal and Installation
(Refer to GROUP 15 - Secondary Air Supply System.)
1
2
3
10±1 N·m
Removal steps
AA""BA1. Radiator upper hose connection
2. Water outlet fitting
"AA3. Thermostat
REMOVAL SERVICE POINT
AA"RADIATOR UPPER HOSE DISCONNECTION
After making mating marks on the radiator hose and the hose
clamp,disconnect the radiator hose.

ENGINE COOLING -Water Pump14-13
WATER PUMP
Caution
If the vehicle is equipped with the Brembo disc brake, during maintenance, take care not to contact
the parts or tools to the caliper because the paint of caliper will be scratched.
REMOVAL AND INSTALLATION
Pre-remobal and Post-installation Operation
DEngine Coolant Draining and Supplying (Refer to P.14-6.)
DTiming Belt Removal and installation (Refer to GROUP 11A.)
1
Bolt specifications
28×22
2
23±3 N·m
14±1 N·m
Nominal diameter×Nominal length mm
8×70
8×14
8×22 8×25
3 4
22±4 N·m
Removal steps
1. Alternator brace
2. Water pump
3. Water pump Gasket
"AA4. O-ring
INSTALLATION SERVICE POINT
"AAO-RING INSTALLATION
Fit an O-ring into the O-ring groove located at the end of
the water inlet pipe and apply water to the O-ring or the
inside of the mounting surface of the water pump for insertion.
CAUTION
Do not let the O-ring get contaminated with grease, such
as engine oil.Water pump
O-ring
Water inlet pipe

ENGINE COOLING -Water Hose and Water Pipe14-14
WATER HOSE AND WATER PIPE
REMOVAL AND INSTALLATION
Pre-remobal and Post-installation Operation
DEngine Coolant Draining and Supplying (Refer to P.14-6.)
DAir Cleaner Assembly Removal and Installation (Refer to GROUP 15 - Air Cleaner.)
DAir Bypass Valve Assembly, Air Bypass Hose, Air Hose E and Air Pipe C, Air Hose D Removal and
Installation (Refer to GROUP 15 - Intercooler.)
DSecondary Air Control Valve Bracket Removal and Installation
(Refer to GROUP 15 - Secondary Air Supply System.)
DBattery, Battery Tray Removal and Installation
3 4
5 6
7 8
9
1012
10±1 N·m
42±7 N·m 13±2 N·m
11
1
2
23±4 N·m
18
1716 1514
13
19
10±1 N·m
42±7 N·m
10±1 N·m
Removal steps
AA""CA1. Radiator upper hose connection
AA""CA2. Radiator lower hose connection
3. Engine coolant temperature gauge
unit connector
4. Engine coolant temperature sensor
connector
5. Water hose
6. Water outlet fitting and thermostat
case assembly
7. Thermostat case gasket
"AA8. O-ring
9. Detonation sensor connection
10. Water hose11. Water hose
12. Heater hose connection
13. Water hose
"BA14. Water inlet pipe
"AA15. O-ring
16. Turbocharger water
feed pipe
17. Gasket
DTurbocharger assembly
(Refer to GROUP 15.)
18. Turbocharger water
return pipe
19. Gasket

ENGINE COOLING -Water Hose and Water Pipe/Radiator14-15
REMOVAL SERVICE POINT
AA"RADIATOR UPPER HOSE/RADIATOR LOWER
HOSE DISCONNECTION
After making mating marks on the hose and the hose clamp,
disconnect the hose.
INSTALLATION SERVICE POINTS
"AAO-RING INSTALLATION
Fit an O-ring into the groove of the water inlet pipe and
apply water to the circumference of the O-ring or the
inside of the mounting surface of the pipe for insertion.
CAUTION
Do not let the O-ring get contaminated with grease, such
as engine oil.
"BAWATER INLET PIPE INSTALLATION
After installing the water outlet fitting and the thermostat
case assembly, tighten the mounting bolt of the water
inlet pipe to the specified torque.
"CARADIATOR LOWER HOSE/RADIATOR UPPER
HOSE CONNECTION
1. Insert each hose as far as the projection of the water
inlet pipe or water outlet fitting.
2. Align the mating marks on the radiator hose and hose
clamp, and then connect the radiator hose.
INSPECTION
WATER PIPE AND HOSE CHECK
Check the water pipe and hose for cracks, damage, clog
and replace them if necessary.
RADIATOR
REMOVAL AND INSTALLATION
Pre-remobal and Post-installation Operation
DEngine Coolant Draining and Supplying (Refer to P.14-6.)
DUnder Cover Removal and Installation (Refer to GROUP 51 - Front Bumper.)
DAir Cleaner Assembly Removal and Installation (Refer to GROUP 15.)
DAir Hose E, Air Pipe C, Air hose D Removal and Installation (Refer to GROUP 15 - Intercooler.)
DBattery and Battery Tray Removal and Installation
Water pump or
thermostat case
O-ring
Warter inlet pipe

INTAKE AND EXHAUST -Intake Manifold15-16
INTAKE MANIFOLD
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
DAir Duct Removal and Installation (Refer to P.15-8.)
DStrut Tower Bar Removal and Installation
(Refer to GROUP 42.)
DUnder Cover Removal and Installation
(Refer to GROUP 51 - Front Bumper.)
DEngine Coolant Draining and Supplying
(Refer to GROUP 14 - On-vehicle Service.)
DThrottle Body Removal and Installation (Refer to
GROUP 13A - Throttle Body.)DCrossmember Bar Removal and Installation (Refer
to GROUP 32 - Engine Roll Stopper, Centermember.)
DFront Exhaust Pipe Removal and Installation (Refer
to GROUP 15 - Exhaust Pipe and Main Muffler.)
DSecondary Air Control Valve Bracket Removal and
Installation (Refer to P.15-14.)
DEngine Oil Draining and Supplying
1
2
3 4
5 6 7
8 10
11
1214
13
15
16 17
18
9
11±1 N·m3.0±0.5 N·m
13±1 N·m
(Engine oil)
(Engine oil) 5.0±1.0 N·m
14 8
Removal steps
1. Center cover
2. Oxygen sensor connector
connection
3. Injector connector connection
4. Fuel pressure solenoid valve
connector connection
5. Purge control solenoid valve
connector connection
6. Knock sensor connector connection
7. Vacuum hose connection
8. Vacuum hose
9. Fuel return hose connection"AA10. Fuel high-pressure hose connection
11. O-ring
AA"12. Delivery pipe, Injector and fuel
pressure regulator assembly
13. Insulator
14. Insulator
15. Oil level gauge and guide
16. O-ring
17. Brake booster vacuum hose
connection
18. Purge hose connection

ENGINE ELECTRICAL -Ignition System16-26
IGNITION SYSTEM
GENERAL INFORMATION
This system is equipped with two ignition coils (A
and B) with built-in power transistors for the No.
1 and No. 4 cylinders and the No. 2 and No. 3
cylinders respectively.
Interruption of the primary current flowing in the
primary side of ignition coil A generates a high
voltage in the secondary side of ignition coil A.
The high voltage thus generated is applied to the
spark plugs of No. 1 and No. 4 cylinders to generate
sparks. At the time that the sparks are generated
at both spark plugs, if one cylinder is at the
compression stroke, the other cylinder is at the
exhaust stroke, so that ignition of the compressed
air/fuel mixture occurs only for the cylinder which
is at the compression stroke.
In the same way, when the primary current flowing
in ignition coil B is interrupted, the high voltage
thus generated is applied to the spark plugs of
No. 2 and No. 3 cylinders.
The Engine-ECU turns the two power transistors
inside the ignition coils alternately on and off. Thiscauses the primary currents in the ignition coils
to be alternately interrupted and allowed to flow
to fire the cylinders in the order 1-3-4-2.
The Engine-ECU determines which ignition coil
should be controlled by means of the signals from
the camshaft position sensor which is incorporated
in the camshaft and from the crank angle sensor
which is incorporated in the crankshaft. It also
detects the crankshaft position in order to provide
ignition at the most appropriate timing in response
to the engine operation conditions. It also detects
the crankshaft position in order to provide ignition
at the most appropriate timing in response to the
engine operation conditions.
When the engine is cold or operated at high
altitudes, the ignition timing is slightly advanced
to provide optimum performance.
When the automatic transmission shifts gears, the
ignition timing is also retarded in order to reduce
output torque, thereby alleviating shifting shocks.
SYSTEM DIAGRAM
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensor
Camshaft position sensor
Crank angle sensor
Ignition switch - ST
Vehicle speed signalEngine-ECU
Ignition coil A
Ignition coil B Ignition switch
Spark plugBattery
To tachometerCylinder No. Air flow sensor
1 4
23
Detonation sensor

ENGINE AND EMISSION CONTROL -Emission Control System
Vacuum tank
Alternator
Purge control solenoid valve
17-10
EVAPORATIVE EMISSION CONTROL SYSTEM
GENERAL INFORMATION
The evaporative emission control system prevents
fuel vapours generated in the fuel tank from
escaping into the atmosphere.
Fuel vapours from the fuel tank flow through the
fuel tank pressure control valve and vapour
pipe/hose to be stored temporarily in the canister.
When driving the vehicle, fuel vapours stored in
the canister flow through the purge solenoid and
purge port and go into the intake manifold to be
sent to the combustion chamber.When the engine coolant temperature is low or
when the intake air quantity is small (when the
engine is at idle, for example), the engine control
unit turns the purge solenoid off to shut off the
fuel vapour flow to the intake manifold.
This does not only insure the driveability when the
engine is cold or running under low load but also
stabilize the emission level.
SYSTEM DIAGRAM
BatteryIntake air
temperature sensor
Barometric pressure
sensor
Check
valve
Canister
Control
relay
Purge control
solenoid valve
(ON: Open)
Engine-ECUEngine coolant
temperature sensor Air flow sensor
COMPONENT LOCATION