2006 MITSUBISHI COLT oil

GENERAL INFORMATION
ENGINE LUBRICATION12-2
GENERAL INFORMATION
M2120000100175
LUBRICATION SYSTEM SCHEMATIC<4A9>
AK402024AC
Oil screenOil pump
Timing chain case
oil passage
Cylinder block
oil passage(right side) Oil filter
Relief valve
Cylinder block
oil passage
(main gallery)Crankshaft
journal
Exhaust camshaft
journal
Oil pressure switch
Cylinder head
oil passage
No.1 Camshaft
journal
Intake camshaft
journal Crankshaft
pin
The lu
brication system of th e 4A9 en gine has a full
pressure de
livery system and a full flow oil filtering
system. The o
il stored in the oil p an is pumped
up/out
by th e oil pump. Af ter the relie f valve regu
-
lates the oil p r essure, th e oil is delivere d to th e cylin-
der block through the o il f ilte r , the o il p a ssag e of the
cylinde
r blo ck a nd the each jou r nal o f the crankshaf t.
The oil del ivered to the ea ch jo urnal of th e cranksh af t
is supplied
to the pin th rough the in ner p a ssage of
the crankshaf
t.
The oil delivered to the cylinder head is supplied t o
the ea
ch journa l of the camshaf t th rough the cylinde r
head.

GENERAL INFORMATION
ENGINE LUBRICATION12-3
LUBRICATION SYSTEM SCHEMATIC<4G1>
AK402151AC
Oil screen
Oil pump
Oil filter
Relief valve
Cylinder block
oil passage
(main gallery)Crankshaft
journal
Exhaust camshaft
journal
Oil pan Oil pressure switch
Cylinder head
oil passage
No.1 Camshaft
journal
Intake camshaft
journal Crankshaft pin
PistonOil jet
Oil cooler
Turbo charger
Lash adjuster Cam
To correspond with the impr oved engine outp u t per-
formance b y emplo y ing the tu rboch a rger , the oil
cooler and
the oil jet are u s ed for 4GI engine.

OIL PUMP<4A9>
ENGINE LUBRICATION12-4
OIL PUMP<4A9>
M2120002000044
AK305367AB
Timing chain caseOil pump
inner rotor
Oil pump
outer rotor Oil seal
Cover
Machine screw
A
A-A
A
The oil pump is of a
cyclo i d type, d i rectly driven by
the crankshaf
t.
On the cycloid o il p u mp, as th e inn e r rotor is ro t a ted
by th
e cran kshaf t, the o u ter rot o r also rot a tes. The
result
a n t ch ange in sp at ial volu mes betwee n the
rotors
genera t es p u mping action .
Sp e c ifically , o il is sucked into the exp and ing sp ace
and is pushed
out from the shrinking sp ace.
ItemSpecification
Ty p eCycloid pump
No. of lobesInner rotor10
Outer rotor11
Displacement L/min(6,000 r/min.)35
RELIEF V A L V E<4A9>
M21200030 0004 7
AK305369AB
Plug
A-A
A A
Relief spring
Relief plunger
Timing chain case
The relief valve is of a
plun ger type. The valve re gu-
lates the maximum pre ssu re of lubricatio n oil being
sent
to the e ngin e .
When the pressure of oil from the oil p u mp exceeds
the specified
value, the valve o pens to relieve the
excess flow
.
The excess o il is ret u rned t o the suct ion side of the
oil pump
.

OIL SCREEN<4A9>
ENGINE LUBRICATION12-5
OIL SCREEN<4A9>
M2120004000039
AK305372AB
Timing chain case
Oil pan
Oil screen
The oil screen is located in the po sition with the lea s t
disturbance to
the oil suction vo lume that result s
from oil
level variat ion in the oil p an while the vehicle
is d
r ive n .
OIL FIL T ER<4A9>
M21200050 0003 2
AK401817AE
Oil filterOil filter
bracket
AK305373
AB
Element
Oil filter
The oil filter is inst alled to the oil filter b r acket
att
a che d to the cylin der block.
ItemSpecification
Filtering methodFull-flow filtering, Paper
element
Filtration area cm2750
Rated flow L/min.25

OIL PAN<4A9>
ENGINE LUBRICATION12-6
OIL PAN<4A9>
M2120006000035
AK305374AB
Oil drain plug
installation side
The oil pan, loca ted be low the engin e , is ma de of
shee
t met a l.
OIL LEVEL GAUGE, OIL FILLER CAP , OIL DRAI N
PLUG<4A9>
M21200070 0003 8
AK402349AC
Oil drain plug
Oil filler cap
Oil level gauge
The oil level gauge , oil filler cap, an d oil drain plu g
are all lo
cated in th e front of the engin e for e xce lle nt
service
ability .

OIL COOLER<4G1>
ENGINE LUBRICATION12-7
OIL COOLER<4G1>
M2120008000020
AK402142
Oil outletOil inlet
To cylinder block
From oil filter
Coolant inlet
(from throttle body)
Coolant outlet
(to water inlet pipe)
Oil cooler boltOil cooler
AC
An
oil cooler is used for the vehicle wit h a turb o-
charge r to improve the per formance of cooling lubri-
cant.
By circulating the coolant an d the o il within t he oil
cooler
, he at is exchang ed an d the o il is coole d .

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-3
SYSTEM BLOCK DIAGRAM
AK600486
Barometric pressure sensorThrottle valve control servo
Manifold absolute pressure
sensor
Engine coolant
temperature sensor
No.1 injector
No.2 injector
No.3 injector
No.4 injector
No.1 Ignition coil
No.2 Ignition coil
No.3 Ignition coil
No.4 Ignition coil
Engine control relay
Throttle valve control servo relay
A/C compressor relay
Fuel pump relay
Alternator G terminal
Cooling fan control relay
Purge control solenoid valve
Diagnostic output terminal
Intake air temperature sensor
Accelerator pedal
position sensor (main) Throttle position sensor (sub)
Camshaft position sensor
Crank angle sensor
Oxygen sensor (front)
Oxygen sensor (rear)
Alternator FR terminal
Inhibitor switch
Detonation sensor
Ignition switch-IG
Ignition switch-ST
Stop lamp switch
Power supply
Accelerator pedel
position sensor (sub) Throttle position sensor (main)
Throttle valve control unitEngine control unit
Engine-ECU or
Engine-CVT-ECU
Throttle opening feedback control Oxygen sensor heater (front)
Oxygen sensor heater (rear)
[1] Fuel injection control
[2] Throttle valve opening control
and idle speed control
[3] MIVEC (Mitsubishi Innovative
Valve timing Electronic
control system)
[4] Ignition timing control
[5] Engine control relay control
[6] Throttle valve control servo
relay control
[7] Fuel pump relay control
[8] Oxygen sensor heater
control
[9] Fan relay control
[10] A/C compressor relay
control
[11] Alternator control
[12] Purge control
[13] EGR control
[14] Diagnostic output
[15] RAM data transmission
Oil feeder control valve
(for MIVEC)
EGR valve
(Stepper motor)
AB

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-4
CONTROL SYSTEM DIAGRAM

AK600525
1 Oxygen sensor
(front)4 Intake air temperature
sensor
3 Manifold absolute
presssure sensor
2 Oxygen sensor (rear) 3 Throttle valve control
servo
10 Throttle position sensor
(main)
2 Purge control
solenoid valve
8 Engine coolant
temperature sensor
9 Detonation sensor
7 Crank angle sensor
6 Camshaft position sensor
4 Oil feeder control valve
1 Injector
AB
M
1 Oxygen sensor (front)
2 Oxygen sensor (rear)
3 Manifold absolute
presssure sensor
4 Intake air temperature
sensor
5 Throttle position
sensor
(sub)
6 Camshaft position
sensor
7 Crank angle sensor
8 Engine coolant
temperature sensor
9 Detonation sensor
10 Throttle position
sensor (main) 1 Injector
2 Purge control
solenoid valve
3 Throttle valve control
servo
4 Oil feeder control
valve
Power supply
Ignition switch-IG
Ignition switch-ST
Accelerator pedal
position sensor
(main)
Accelerator pedal
position sensor
(sub)
Alternator FR
terminal
Stop lamp switchEngine-ECUEngine control relay
Fuel pump relay
A/C compressor relay
Throttle valve
control servo relay
Ignition coil
Cooling fan
control relay
Diagnosis output
Alternator G terminal
Oxygen sensor heater
(front)
Oxygen sensor heater
(rear)
Canister Air
inlet
Catalytic converter From fuel
pump
5 Throttle position sensor
(sub)
Barometric
pressure
sensor