1991 MITSUBISHI 3000GT Service Manual

COOLING - Thermostat14-11
THERMOSTATMlbGB- -
iREMOVAL AND INSTALLATION
L
Pre-removal and Post-installation
l Draining and Supplying of the
(Refer to GROUP 00
- Maintenance
Removal steps
1. Air hose A +a2. Air intake hose A
3. Air intake hose
4. Connection of radiator lower hose
5. Water inlet fitting
6. Gasketl a 7. Thermostat
OlFOO37
7cooo43l
Fullyclosed j
04N0004
INSPECTIONM14GDALl Check that valve closes tightly at room temperature.
l Check for defects or damage.
l Check for rust or encrustation on valve. Remove if any.
l Immerse thermostat in container of water. Stir to raise
water temperature and check that thermostat opening
valve temperature and the temperature with valve fully
open [valve lift-over
10 mm (39 in.)] are at the standard
value.
Standard value:
Opening valve temperature
Full-open temperature
NOTE76.5%
(‘170°F)
90°C ( 194°F)Measure valve height when fully closed. Calculate lift by
measuring the height when fully open.
-
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14-12COOLING - Thermostat
Air intake hose B
05FOO23
,
SERVICE POINTS OF INSTALLATIONM14GEAI7. INSTALLATION OF THERMOSTAT
Install the thermostat with its jiggle valve lined up with the ,
”mark on the thermostat housing.LJ2. INSTALLATION OF AIR INTAKE HOSE A
Assemble the air intake hose A with its notches (arrow-
marked) lined up with the
L marks on the air intake hoses
B and C. Insert the hoses into the air intake hose A until
they are bottomed.
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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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COOLINGEngine Coolant Temperature Gauge Unit, Engine Coolant- Temperature Sensor and Engine Coolant Temperature Switch14-15
ENGINE COOLANT TEMPERATURE GAUGE UNIT, ENGINE COOLANT
TEMPERATURE SENSOR AND ENGINE COOLANT TEMPERATURE
L,SWITCH
REMOVAL AND INSTALLATIONM140B. -Pre-removal and Post-installation
Operation
l Draining and Supplying of theEngine Coolant(Refer to GROUP 00 - MaintenanceService.)
30 NmOlFOO38
Removal steps
1. Air hose A l +2. Air intake hose A IF*3. Air intake hose B
4. Connection of radiator upper hose
5. Engine coolant temperature gauge unit
6. Engine coolant temperature sensor
(Engine control)7. Engine coolant temperature switch(Air conditioner)
INSPECTIONM140DAM
ENGINE COOLANT TEMPERATURE GAUGE UNITRefer to GROUP 54
- Meters and Gauges.
ENGINE COOLANT TEMPERATURE SENSOR (Engine con-
trol)Refer to GROUP 13
- MPI System Inspection.
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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-I
I
k..INTAKE AND ~
EXHAUST
=
CONTENTSME.AA- -
ACTIVE EXHAUST SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR CLEANER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR INTAKE PLENUM . . . . . . . . . . . .
AIR INTAKE PLENUM . . . . . . . . . . . . . . . . . . . .
EXHAUST MANIFOLD . . . .._.._.
EXHAUST MANIFOLD . . . . . . . . . . . . . . . ..__
LEXHAUST PIPE, MAIN MUFFLER ANDCATALYTIC CONVERTER . .EXHAUST PIPE, MAIN MUFFLER AND
CATALYTIC CONVERTER . . . . . . . . . . . . . . . .
INTAKE MANIFOLD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTERCOOLER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE ADJUSTMENT PROCEDURES. . . . . . . .Air Bypass Valve Inspection
. . . . . . . . . . . . . .._..Intake Manifold VacuumInspection
. . . . . . . . . . . . . . . .Supercharging Pressure Control System
Inspection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
9
13
14
27
28
30
31
16
11
6
8
8
7Supercharging Pressure Relief Solenoid
ValveInspection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._........Turbocharger Supercharging Pressure
Inspection
. . . . . . . . . . .._................................._.___.........Variable Induction Control System
Inspection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.....
SPECIAL TOOL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._____..
SPECIFICATIONS................................................General Specifications
....................................Service Specifications
....................................
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . .._._.._....Abnormal Noise
Exhaust Gas Leakage
TROUBLESHOOTING
(Active Exhaust System)
. . . . . . . . . . . . . . . . . . . . . . ..________....
TURBOCHARGER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TURBOCHARGER(FRONT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TURBOCHARGER (REAR). . . . . . . . . . . . . . . .8
6
4
24
18
21

15-2INTAKE AND EXHAUST - Specifications / Special Tool
SPECIFICATIONS
GENERAL SPECIFICATIONS
Items
Air cleaner
Element
Exhaust system
Front exhaust pipe
Muffler
Coupling
Suspension system
Turbocharger
We
identification No.
Supercharging pressure control
Intercooler
Type
SERVICE SPECIFICATIONSMlSCA-
Specifications
Unwoven cloth type
Dual type
Expansion resonance type
Flat coupling, insertion type
Rubber hangers
Exhaust gas turbine type
TD04-09BS-6
Waste gate actuator and solenoid valve
Air cooled type
MVXB-.
Items
Intake and exhaust manifolds
Distortion oJcnylirrdjer head contactingsurface
Supercharging pressure solenoid valve
terminal resistance [at 20°C (68”F)lQ
Turbocharger
Supercharging pressure
kPa (psi)
Waste gate valve opening pressure
kPa (psi)
Standard
Less than 0.15 (.0059)36-44
Approx. 20 - 60 (2.9 - 8.7)
Approx. 48 (6.8)
Limit
0.2
f.008)
SPECIAL TOOLMlSDA- -
ToolNumber
MD998770
Name
Oxygen sensor
wrench
Use
Removal/Installation of oxygen sensor
J
iJ
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