1991 MITSUBISHI 3000GT Service Manual

INTAKE AND EXHAUST - Turbocharger (Front)15-19
05FOO2(
SERVICE POINTS OF REMOVALM15LBAE
19. REMOVAL OF OXYGEN SENSORDisconnect the connector of the oxygen sensor, and install
the special tool to the oxygen sensor.
25. DISCONNECTION OF AIR CONDITIONER COMPRES-
SORDisconnect air conditioner compressor with hoses from the
bracket.
NOTEThe removed air conditioner compressor should be fas-
tened (by using rope, etc.) in a position that will not interfere
with the removal/installation of the turbocharger assembly.
INSPECTION
TURBOCHARGER ASSEMBLY CHECKMlSLCADl
lVisually check the turbine wheel and the compressor wheel
for cracking or other damage.
l Check whether the turbine wheel and the compressor
wheel can be easily turned by hand.
l Check for oil leakage from the turbocharger assembly.
lCheck whether or not the waste gate valve remains open. If
any problem is found, replace the part after disassembly.
OIL PIPE AND OIL-RETURN PIPE CHECKCheck the oil pipe and oil-return pipe for clogging, bending, or
other damage.
If there is clogging, clean it.
SERVICE POINTS OF INSTALLATIONMllLDAE
24. INSTALLATION OF TURBOCHARGER ASSEMBLYClean the alignment surfaces shown in the illustration.
Supply clean engine oil through the oil pipe installation hole
of the turbocharger assembly.
CautionWhen cleaning, care must be taken so that a piece of
the gasket does not enter the oil passage hole.
TSB Revision

15-20INTAKE AND EXHAUST - Turbocharger (Front)
19. INSTALLATION OF OXYGEN SENSORUse the special tool to install the oxygen sensor.
I;,iI-
i=x---b05F004E
l MatchmarkHose end paintPipe end protrusion05F002F
l MatchmarkHose end paintPipe end protrusion
Intercoolerright
J
Air Intake hose B
05FOO237. INSTALLATION OF AIR HOSE E
/ 5. AIR HOSE B
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 or pipes.
3. INSTALLATION OF AIR HOSE D
/ 1. AIR HOSE C
Aligning the marks at the points indicated by the arrows,
insert securely into the stepped portion of the pipe.
CautionBe careful not to allow any foreign matter to get into
the hoses or pipes.
LJ2. INSTALLATION OF AIR INTAKE HOSE B
Engaging the notches with
LL marks at the points indicated
by the arrows, insert until seated.
Insert the turbocharger end of air intake hose B completely.
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INTAKE AND EXHAUST - Turbocharger (Rear)15-21
TURBOCHARGER (REAR)
iREMOVAL AND INSTALLATION
/
id
Post-installation ODerationIl Installation of Front Exhaust Pipe(Referto P.15-31.)l Refilling of the Engine Coolant
(Refer to GROUP 00 - Maintenance
l Adjustment of Accelerator Cable1~~~~o~~ GROUP 13 - Engine
lo-13Nm7 - 9 ft.lbs.
6.
7 55-65Nmb
5 40 - 47 ft.lbs.i18Nm’
d13 ft.lbs.
MlSLA-B
0-nng
05FOOO3Removal steps
1. Battery2. Connection of accelerator cable
** 3, pg,t;eye)l * 4.
AirpipeA5. Heat protector F
6. Clutch booster vacuum hose
7. Connection of accelerator cable
(pedal side)
I)+8. Air intake hose AO+9. Air intake hose Cl * I)* 10. Oxygen sensor
11. Heat protector D12. EGR pipe
9Nmv 10 //--!
-7 ft.lbs.45 Nm33 ft.lbs.LIZ-15NmOSFOO419- 11 ft.lbs.
13.Eye boltl * 14. Oil pipe15.EGR valve16. Water pipe A
17. Water pipe B
18.Exhaust fitting
19. Heat protector E
20.Gasket21,. Turbocharger & return pipe assembly
22. Oil return pipe
l * 23. Turbocharger assembly24.Gasket25.Ring26. Exhaust fitting stayTSB Revision

INTAKE AND EXHAUST - Turbocharger (Rear)
0
Comrxessorwheel \u ~i, rOlR0182
I05FOO19
SERVICE POINT OF REMOVALM15LBAF
10. REMOVAL OF OXYGEN SENSOR
Disconnect the connector of the oxygen sensor, and install
’the special tool to the oxygen sensor.
d,
INSPECTION
TURBOCHARGER ASSEMBLY CHECK
M15LCADZ
lVisually check the turbine wheel and the compressor wheel
for cracking or other damage.
l Check whether the turbine wheel and the compressor
wheel can be
easily.turned by hand.
l Check for oil leakage from the turbocharger assembly.
lCheck whether or not the waste gate valve remains open. If
any problem is found, replace the part after disassembly.
OIL PIPE AND OIL-RETURN PIPE CHECKCheck the oil pipe and oil-return pipe for clogging, bending, or
other damage.
If there is clogging, clean it.
SERVICE POINTS OF INSTALLATIONMlBLDAF
23. INSTALLATION OF TURBOCHARGER ASSEMBLYClean the alignment surfaces shown in the illustration.
CautionWhen cleaning, care must be taken so that a piece of
the gasket does not enter the oil passage hole.
14. INSTALLATION OF OIL PIPESupply clean engine oil through the oil pipe installation hole
of the turbocharger assembly.
10. INSTALLATION OF OXYGEN SENSORUse the special tool to install the oxygen sensor.
TSB Revision

INTAKE AND EXHAUST - Turbocharger (Rear)15-23
Air intake hose A
Air intake hose BHose end
paint
3
9.INSTALLATION OF AIR INTAKE HOSE C / 8. AIR INTAKE
HOSE AEngaging the notches with
n marks at the points indicated
by the arrows insert until seated.
Insert the turbocharger end of air intake hose C completely.
4. INSTALLATION OF AIR PIPE A
/ 3. AIR HOSE A
Aligning the marks at the points indicated by-the arrows,
insert securely into the stepped portion of the pipe.
CautionBe careful not to allow any foreign matter to get into
the hoses or pipes..
1 TSB Revision
id

15-24INTAKE AND EXHAUST - Turbocharger
TURBOCHARGERAIIlSLE- _
DISASSEMBLY AND REASSEMBLY
Disassembly steps
I Snap pin2. Waste gate actuator
3. Coupling
I)+ 4. Turbine housing** I)* 5. Snap ring+I) l *6. Cartridge assemblyl * 7. O-ring
8. Compressor cover
12 Nm
71N0096
I61N0053
SERVICE POINTS OF DISASSEMBLYMISLFAC5. REMOVAL OF SNAP RING
Place the compressor cover assembly on the floor with its
end surface down and remove the snap ring with pliers.
Caution
During removal, hold with a finger the snap ring whichcan spring out.
1 TSB Revision6. REMOVAL OF CARTRIDGE ASSEMBLY
Remove the cartridge assembly by tapping the compressor
cover with a soft hammer.
Caution
Some resistance will be experienced in the removal dueto the O-ring on the cartridge assembly.

INTAKE AND EXHAUST - Turbocharger
INSPECTION
TURBOCHARGER
15-25MllLGAB
(I) Manually open and close the waste gate valve to make sure
it operates freely.
(2)Inspect the oil passage in the cartridge for signs of deposits
or blockage.
(3) Clean the inlet section of the compressor cover with a rag.
Inspect it for signs of contact with the compressor turbine.
If worn, replace it.
L/
O-ring
3EN23C3062
snap ring Chamfered
.
v cartr~d~om,,ir
,jFcover
WI61 NO070
SERVICE POINTS OF REASSEMBLYM15LHAC7. INSTALLATION OF O-RING
Coat the inner surface of a new O-ring with a thin film of
engine oil, and set it in the groove of the cartridge
assembly.
Caution
Be careful not to damage the O-ring while installing itas oil leakage could result.
6. INSTALLATION OF CARTRIDGE ASSEMBLY
(1) Coat the outer circumference of the cartridge assembly
O-ring with a thin film of engine oil.
(2) Install the cartridge assembly on the compressor cover
by aligning the dowel pin.
CautionWhen installing the cartridge assembly on the
compressor cover, be careful not to damage the
compressor wheel blades.5. INSTALLATION OF SNAP RING
Place the cartridge assembly with the compressor cover
faced down and install the snap ring.
Caution
Install the snap ring with the tapered side of its outsidediameter up.
TSB Revision4. INSTALLATION OF TURBINE HOUSING
Install the compressor cover and cartridge assembly on the
turbine housing with the dowel pin in alignment.
Caution
1.Be careful not to damage the blades of the turbine
wheel.2. Be careful to install the turbine housing in the
correct direction.

15-26INTAKE AND EXHAUST - Turbocharger
TEST OF WASTE GATE ACTUATOR OPERATIONMlSLlAC
Using a tester, apply a pressure of approx. 48
kPa (6.8 psi) to
the actuator and make sure that the rod moves.
Lj
Caution90
not apply a pressure of more than 61 kPa (8.7 psi) to theactuator. Otherwise, diaphragm may be damaged.
/Never attempt to adjust the waste gate valve.
1 TSB RevisionI