oil MITSUBISHI 3000GT 1991 Manual Online

COOLING - Specifications / Troubleshooting
SEALANT AND ADHESIVE14-3
MMCE- -
/
id
ItemsSpecified sealants and adhesive/
Engine coolant temperature gauge unit
Engine coolant temperature sensor (Engine control)
Engine coolant temperature sensor (Air conditioner)3M Nut Locking Part No. 4171
TROUBLESHOOTING
L
MllEAAL
Symptom
OverheatProbable cause
Insufficient engine coolant
Too high an anti-freeze concentration
Inoperative electric cooling fan
Faulty thermosensor
Faulty electrical motor
Faulty radiator fan relayRemedy
Replenish
Correct anti-freeze concentration
Replace
Damaged or blocked (insufficiently ventilated)
radiator finsCorrect
Water leaks
Damaged radiator core joint
Corroded or cracked hoses
(radiator hose, heater hose, etc.)
Faulty cap valve or setting of spring
Cracked thermostat housing
Loose water pump mounting bolt or leaking
gasket
Replace
Loose bolt or leaking gasket in water outlet
I
Correct or replacefitting
Loose bolt or leaking gasket in water inletfitting
Loose thermostat housing bolts or leakingfrom gasket
Retorque bolts or replace gasket
Faulty automatic transaxle oil cooler operation
Blocked or collapsed hose and pipeReplace
Loose hose and pipe connectionCorrect
Faulty thermostat operationReplace
Faulty water pump operationReplace
Water passage clogged with slime or rust depositClean
or foreign substance
No rise in temperature
Faulty thermostatReplace
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14-8COOLING - Radiator
RADIATOR
REMOVAL AND INSTALLATIONM14QA..
Removal steps of radiator
1. Drain plug2. Cap3. Overflow tube
4. Water level sensor connector
5. Reserve tank
6. Radiator upper hose
7. Radiator lower hose
8. Automatic transaxle oil cooler hoses
9. Condenser fan motor connector
10. Condenser fan motor assembly

** 11. Radiator fan motor connector
12. Connection of therm0 sensor(For radiator fan)13. Connection of therm0 sensor(For condenser fan)
14. Radiator fan motor assembly
15. Upper insulator
16. Radiator assembly
17. Lower insulator
Removal steps of radiator fan motor assembly
1. Drain plug2. Cap
6. Radiator upper hose
9. Condenser fan motor connector

10. Condenser fan motor assembly

l * 11. Radiator fan motor connector12. Connection of therm0 sensor(For radiator fan)13. Connection of therm0 sensor
18.
Therm0 sensor (For radiator fan)
19. Therm0 sensor (For condenser fan)
(For condenser fan)
20. Fan
14. Radiator fan motor assembly20. Fan
21. Radiator fan motor21. Radiator fan motor
22. Resistor22. Resistor
23. Shroud23. Shroud
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COOLING - Radiator14-S
- 04N0002
SERVICE POINT OF REMOVALM14QBAK8. DISCONNECTION OF AUTOMATIC TRANSAXLE OIL
COOLER HOSESUse a plug or otherwise cover the hose and nipple part of
the radiator so that dust, dirt, foreign materials, etc. do not
enter after the hose has been disconnected from the
radiator.
INSPECTIONM14QCAN
l Check for foreign material between radiator fins.
l Check the radiator fins for bent, or damage.
l Check the radiator for corrosion, damage rust or scale.
lCheck the radiator hoses for cracks, damage or deteriora-
tion.
l Check the reserve tank for damage.
lCheck the automatic transaxle oil cooler hoses for cracking,
damage or deterioration.
RADIATOR FAN MOTOR INSPECTION
(1) Check to be sure that the radiator fan rotates when battery
voltage is applied between terminals (as shown in the
figure).(2) Check to see that abnormal noises are not produced, while
motor is turning.
INSPECTION OF RESISTOR(1) Measure the resistance between connector terminals @
and @ of the radiator fan motor.
(2) The resistor is normal if the resistance is within the
following range.
Resistance: 0.29
- 0.35 IZ
THERM0 SENSOR INSPECTION
(1) Immerse the water temperature switch in hot water as
shown.
(2) Change the water temperature and check continuity with a
circuit tester.. If it is as specified below, the switch is
functioning correctly.
Item
With continuityb;F;;ature of
Without continuity
(t;,n-r3;rature ofFor condenser fanFor radiator fan91
- 99°C81 - 89°C(196 - 210°F)(178 - 192°F)87°C (189°F)
’77°C (I 71 “F)
or lessor less
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COOLING - Water Pump, Water Pipe and Water Hose
WATER PUMP, WATER PIPE AND WATER HOSE
14-13
M14MB-B
/REMOVAL AND INSTALLATION
Pre-removal and Post-installation
Operation
l Draining and Supplying of the Engine Coolant
(Refer to GROUP 00 - Maintenance Service.)l Removal and Installation of Power Transistor
Unit and Ignition Coil
(Refer to GROUP 16 - Engine Electrical)l Removal and lnstallatlon of Timing Belt
(Refer to GROUP 11 -Timing Belt)17-20 Nm17-20 Nm
12-14ft.lbs.
1
12-15Nm9-11 ft.1bs.q
Removal steps
1. Water pump
2. Gasket
3. Air hose A
4. Air intake hose A
5. Air intake hose B
6. Air intake hose C
7. Air intake hose
8. Connection of radiator upper hose
9. Connection of water hose
IO. Water outlet fitting11. Gasket
12. Connection of harness
13. Connection of heater hose
14. Connection of water hose A
15. Connection of water hose
16. Connection of water hose
17. Connection of radiator lower hose
18. Connection of water hose
19. Thermostat housing
20. Gasket21.
Her water pipe22. O-ringOlFOO51
Installation steps
2. Gasket** 1. Water pumpI)+ 22. O-ring
l * 21. Inlet water pipe
20. Gasket
19. Thermostat housing18. Connection of water hose 17. Connection of radiator lower hose16. Connection of water hose
15. Connection of water hose
14. Connection of water hose A
13. Connection of heater h&e
12. Connection of harness11. Gasket10. Water outlet fitting
9. Connection of water hose
8. Connection of radiator upper hose7. Air intake hose l *6. Air Intake hose C **5. Air intake hose B l *4. Air intake hose A
3. Air hose A
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COOLING - Water Pump, Water Pipe and Water Hose
INSPECTION
WATER PUMP
I
MIQMDAOZIf any of the following irregularities are observed, replace the
LJwater pump as an assembly.
(1) Damage or crack on the water pump body
(2) Water leakage. With improper sealing, a water leakage
mark may be observed around hole
@.
,
(.31 x .98)OlLO188
6COO35
Air intake hose BOSFOO23
SERVICE POINTS OF INSTALLATION
1. INSTALLATION OF WATER PUMPM14MEAW
(1) Clean both gasket surfaces of water pump body and
cylinder block.
(2) Install new water pump gasket and water pump
assembly and tighten the bolts.
(3) Water pump installation bolt size are different and
caution must be paid to ensure that they are properly
installed.
22. INSTALLATION OF O-RING / 21. INLET WATER PIPEReplace the O-rings at both ends of the water inlet pipe
with new ones and apply water to the outside of O-rings to
help smooth insertion of the pipe into the water pump,.
thermostat housing.
CautionLJCare must be taken not to permit engine oil or
othergreases to adhere to the O-ring.
6.INSTALLATION OF AIR INTAKE HOSE C / 5. AIR INTAKEHOSE B
/ 4. AIR INTAKE HOSE A
Assemble the air intake hose A with its notches (arrow-
marked) lined up with the
D marks on the air intake hoses
B and C. Insert the hoses into the air intake hose A until
they are bottomed.
Insert the air intake hoses B and C on the turbocharger side
until they are bottomed.
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14-16
I
COOLINGEngine Coolant Temperature Gauge Unit, Engine Coolant- Temperature Sensor and Engine Coolant Temperature SwitchI
Air Intake hose B
05FOO2:
ENGINE COOLANT TEMPERATURE SWITCH (Air condition-I
4
(1) Immerse the engine coolant temperature switch in oil and
then heat (by using a gas stove flame or similar method) so
as to increase the oil temperature.
L.2~(2) Check to be sure that the engine coolant temperature
switch is switched OFF when the oil temperature reaches
the standard value.
Standard value: 112
- 118°C (234 - 244°F)
Caution
The oil used above should be engine oil and should be
stirred well while being heated; do not heat more than
necessary.
SERVICE POINTS OF INSTALLATIONM140EAz
3.INSTALLATION OF AIR INTAKE HOSE B / 2. AIR INTAKE
HOSE AB and L. Assemble the air intake hose A with its notches (arrow-
marked) lined up with the
n marks on the air intake hoses
. -dInsert the hoses Into the air intake hose A until they are
bottomed.
Insert the air intake hose B on the turbocharger side until
they are bottomed.
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15-6INTAKE AND EXHAUST - Service Adjustment Procedures
Variable rnductiorcontrol servoconnectors
6FU1277
Open
Close
71 NO105
SERVICE ADJUSTMENT PROCEDURESMlSGlAA
VARIABLE INDUCTION CONTROL SYSTEM IN-
d
SPECTION (Non Turbo)
SYSTEM INSPECTION
(1) Warm up the engine.
(2) Connect the tachometer. (Refer to GROUP 11 - Engine
Adjustment.)
(3) Make sure that when the engine speed is increased from
the idle speed to 5,000 rpm, the induction control valve
shaft turns.
VARIABLE INDUCTION CONTROL SERVO INSPECTION
(1) Disconnect the variable induction control servo connectors.
(2)
Teck the vanable induction control servo coil for continui-
Standard value
Measured terminalBetween terminals
@ and @]Continuity
Present
15 - 35 0: 20°C (68”F)I
(3) Make sure that when DC 6V is applied to terminals @ and@ of the variable induction control servo connector, the
induction control valve shaft turns smoothly.
Caution
Be sure to apply a voltage of not higher than DC 6V tothe variable induction control servo connector termi-4nals since application of high voltage may lock the
servo gears.
(4) If deviation from the standard value.occurs or the variable
induction control valve shaft does not turn smoothly,
replace the air intake plenum assembly.
TURBOCHARGER SUPERCHARGING PRESSURE
INSPECTION (Turbo)MlSGAAC
CautionPerform running inspection with two passengers in the
vehicle and where full throttle acceleration can be safely
made.The pressure gauge reading is taken by a front seat
passenger.‘,k,i
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INTAKE AND EXHAUST - Service Adiustment Procedures
SUPERCHARGING PRESSURE RELIEF SOLENOID
VALVE INSPECTION (Turbo)
OPERATION INSPECTION
(1) Connect a hand vacuum pump to the solenoid valve nipple@ (see the illustration to the left).
(2) Using a jumper wire, connect between the solenoid valve
terminal and battery terminal.
(3) Connecting and disconnecting the jumper wire at the
battery negative terminal to apply a negative pressure,
check tightness.
Jumper wire
@I nippleNormal conditioncondition
Connected
Disconnected
OpenNegative pressure leaks.
CloseNegative pressure is held.
OpenNegative pressure is held.
COIL RESISTANCE INSPECTIONMeasure resistance between solenoid valve terminals
Standard value: 36
- 44 0 [at 20°C (68”F)I
AIR BYPASS VALVE INSPECTION (Turbo)MlSGHAB
(1) Remove the air bypass valve.
(2) Connect the hand vacuum pump to the nipple of the air
bypass valve.
(3) Apply a negative pressure of approx. 400 mmHg (16
in.Hg),and check operation of the valve. Also check that air
tightness is maintained.
Negative pressure
About 400
mmHg (16 in.Hg)
Valve operation
It starts opening
INTAKE MANIFOLD VACUUM INSPECTIONM’ISGCACRefer to GROUP 11
‘- Service Adjustment Procedures.
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INTAKE AND EXHAUST - Intercooler
INTERCOOLER
/REMOVAL AND INSTALLATION18
/?1IO-13Nm
7-9ftJbs.
/Turbocharger
b-ring
05FOOO3MlSTA-
-
I
lo-13Nm7 - 9 ft.lbs.
OSPDOU24Nm
/ 17 ft.lbs.
ANm
7-.9 ft.lbs.
. .-...2.9 ft.lbs.lo-13Nm
’7 - 9 ft.lbs.2
_ .
Removal steps of intercooler right
**I. Air hose Cl *2. Air hose D3. Intercooler duct (RH)l *4. Intercooler rightRemoval steps of intercooler left
l *5. Air hoseG
6. Air pipe A
7. Heat protector F
I)* 8. Air hose Bl *9. Air hose E10. Air pipe BII. Air pope C** 12. Air hose F*I)13. Engine oil cooler
14. Intercooler duct (LH)
l * 15. Intercooler left
lo-13 Nm7 - 9 ft.lbs.OSFOC.02
(When equipped with intercooler left)
l Installation of Front Bumper
(Refer to GROUP 51 - Front Bumper.)Removal steps of air intake hose
16. Connection of boost hose
17. Air hoseA
18. Connection of air flow sensor connector
I)* 19. Air intake hose A** 20. Air intake hose B*a 21. Air intake hose C
22. Air cleaner
23. Air by-pass hose
24. Air by-pass valve
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15-12INTAKE AND EXHAUST - lntercooier
SERVICE POINT OF REMOVALMlSTSAC
13. REMOVAL OF ENGINE OIL COOLERIDisconnect the hose from the engine oil cooler and remove
the engine oil cooler only.
IL)
INSPECTIONMISTCAB
lCheck the intercooler fins for bending, damage, or foreign
matter.
lCheck the intercooler hoses for cracking, damage, or wear.
Air Intake hose B
Air hose
05FOO21
SERVICE POINTS OF INSTALLATIONMlSTDAC
21. INSTALLATION OF AIR INTAKE HOSE C
/ 20. AIR
INTAKE HOSE B
/ 19. AIR INTAKE HOSE A
Engaging the notch with the
n mark at points indicated by
the arrows, insert air intake hoses B and C until seated.
Insert the turbocharger end of air intake hoses B and C
completely.
15. INSTALLATION OF INTERCOOLER LEFT / 12. AIR HOSEF
/ 9. AIR HOSE E / 8. AIR HOSE B / 5. AIR HOSE G
Aligning the marks at the points indicated by the arrows,
insert securely into the stepped portion of the pipe or until
seated.
CautionBe careful not to allow any foreign matter to get into
the hoses, pipes, or the intercooler itself.
4.INSTALLATION OF INTERCOOLER RIGHT / 2. AIR HOSED
/ 1. AIR HOSE C
Aligning the marks at the points indicated by arrows, insert
securely into the stepped portion of the pipe.
CautionBe careful not to allow any foreign matter to get into
the hoses, pipes, or the intercooler itself.
1 ~
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