radiator MITSUBISHI 3000GT 1991 Service Manual

GENERAL - Maintenance Service00-41
Good
t-lVA0283
I04FOOOd(4) Check the oil filter for clogging and damage and replace if
necessary.
(5) Clean drain plug and tighten drain plug with gasket to 30
-35 Nm (22
- 25 ft.lbs.).
(6) Clean both gasket surfaces of transaxle case and oil pan.
(7) Install oil pan with new gasket and tighten oil pan bolts to
10 - 12 Nm (7.5 - 8.5 ft.lbs.).
(8) Pour 4.5 liters (4.8 qts.) of specified ATF into case through
dipstick hole. [Total quantity of ATF required is approx. 7.5
liters (7.9 qts.). Actually however, approx. 4.5 liters (4.8 qts.)
of fluid can be replaced because rest of fluid remains in
torque converter.]
Specified fluid: Dia ATF SP or MITSUBISHI PLUS ATF or
equivalent(9) Start engine and allow to idle for at least two minutes.
Then, with parking brake on, move selector lever momen-
tarily to each position, ending in “N” Neutral position.
(lO)Add sufficient ATF to bring fluid level to lower mark.
Recheck fluid level after transaxle is at normal operating
temperature. Fluid level should be between upper and
lower marks of “HOT” range. Insert dipstick fully to prevent
dirt from entering transaxle.
11. ENGINE COOLANT (Change)
MOOSBEHCheck the cooling system parts, such as radiator, heater, and
oil cooler hoses, thermostat and connections for leakage and
damage.
CHANGING COOLANT
1.
2.
3.
4.
5.
6.
7.
8.Remove te heat protectors (front and rear) from the exhaust
manifold.
Loosen the radiator drain plug, remove two drain plugs from
the engine block (one for each bank) and remove the
radiator cap to discharge coolant.
Remove the reservoir tank and discharge coolant.
When coolant has been discharged, pour water through the
filler port to flush coolant passage.
Coat the threads of the engine drain plugs with the
specified sealant and tighten the plugs to specification.
Specified sealant: 3M Nut Locking Part No. 4171 or
equivalentTightening torque: 40 Nm (29
ftlbs.)Fit the radiator drain plug securely.
Mount the reserve tank.
Slowly pour coolant into the radiator to the brim and also
into the reserve tank up to the FULL line.
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00-42GENERAL - Maintenance Service
14UOO729. Install the radiator cap securely.
10.
Start’the engine and warm up until the thermostat opens.
11. Race the engine up to around 3,000 rpm several times, then
stop the engine.,12. When the enkine has cooled down, remove the radiator cap
L/and add coolant up to the brim. Add coolant to the reserve
tank up to the FULL line.

1. Lift up the vehicle.
2.Loosen the radiator drain plug, remove the drain plug from
the rear bank of the engine and remove the radiator cap to
discharge coolant.
3. Follow the same steps 3 to 12 above.
12.DISC BRAKE PADS (Inspect for wear)MOOSBFDCheck for fluid contamination and wear. Replace complete set
of pads if defective.
Caution
The pads for the right and left wheels should be replaced atIIthe same time. Never “split” or intermix brake pad sets. AllUfour pads must be replaced as a complete set.
Thickness of lining (A):
Limit2.0 mm (.08 in.)
13. BRAKE HOSES (Check for deterioration or
leaks)
MOOSBHBInspection of brake hoses and tubing should be included in all
brake service operations.
The hoses should be checked for:
1.Correct length, severe surface cracking, pulling, scuffing or
worn spots. (If the fabric casing of the hoses is exposed by
cracks or abrasion in the rubber hose cover, the hoses
should be replaced. Eventual deterioration of the hose may
occur with possible bursting failure.)
2. Faulty installation, casing twisting or interference with
wheel, tire or chassis.
14. BALL JOINT AND STEERING LINKAGE SEALS
(Inspect for grease leaks and damage)
MOOSglC1. These components, which are permanently lubricated at
the factory, do not require periodic lubrication. Damaged
seals and boots should be replaced to prevent leakage or
contamination of the grease.
2.Inspect the dust cover and boots for proper sealing, leakageIdand damage. Replace them if defective.
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ENGINE - Engine AssemblyII-17
ENGINE ASSEMBLY
/REMOVAL AND INSTALLATION
I
Pre-removal Operationl Release of Residual Pressure from HighPressure Fuel Hose(Refer to GROUP 13 -Service AdjustmentProcedures,)l Removal of Cruise Control Pump andLink Assembly(Refer to GROUP 13 - Cruise Control.)l Removal of Hood(RefertoGROUP42A-Hood.)
l
Removal of Air Hose and Air Pipe (Refer to GROUP 15 - Inter Cooler.)l Removal of Front Exhaust Pipe(Refer to GROUP 15 - Exhaust Pipe and Main Muffler.l Removal of Transaxle Assembly(Refer to GROUP 22, 23 -Transaxle Assembly.)l Removal of Radiator(Refer to GROUP 14-Radiator.)
Post-installation Operationl Installation of Radiator(Refer to GROUP 14 - Radiator.)l Installation of Cruise Control Pump andLink Assembly(Refer to GROUP 13 -Cruise Control.)l Installation of Transaxle Assembly(Refer to GROUP 22,23 -Transaxle Assembly.)l lnstallatron of Front Exhaust Pipe(Refer to GROUP 15 - Exhaust Pipe and Main Muffler.)l Installation of Air Hose and Air Pipe (Refer to GROUP 14 - Inter Cooler.)l Installation of Hood(Refer to GROUP 42A- Hood.)l Supplying of Engine Oil(Refer to GROUP 00 - Maintenance Service.)l Adjustment of the Accelerator Cable(Refer to GROUP 13 - Engine Control.)
MllSA-B
4 ft.lbs.
6
40-45 Nm
29 - 33 fklbs.
Removal steps
1. Connection of accelerator cable11. Drive belt (Alternator and air conditioner)
2. Connection of brake booster vacuum hose(Refer to P.l l-l 1.)
3. Connection of booster vacuum12. Drive belt (Power steering)
hose
(Referto P.l l-l I.)4. Connection of fuel return hose13. Connection of alternator harness
5. Connection of fuel high pressure hose14. Oxygen sensor connector
6. Connection of ground cablel *15. Air conditioner compressor
7. Solenoid valve assembly4w
16. Power steering oil pump
8. Connection of vapor hose17. Oil pressure switch connector (Power steer-9. Connection of heater hoseing)10. EGR temperature sensor connector18. Connection of oil cooler pipes

OlFOO43
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ENGINE - Winder Head Gasket11-23
CYLINDER HEAD GASKETREMOVAL AND INSTALLATION
MllJA-6
Pre-removal and Post-installation Operation
Draining and Supplying
l Engine Coolant(Refer to GROUP 00 -Maintenance Service.)Removal-and Installationl Air Intake Manifold(Refer to GROUP 15 -Air intake Manifold.)l Turbocharger (Refer to GROUP 15 -Turbocharger.)l Exhaust Manifold(Refer to GROUP 15 - Exhaust Manifold.)l Timing Belt(Referto P.l I-26.)
10 Nm3Nm
2.2 klbs.P
~~(Refer to GROUP 13 - Engrne Control.)
10 Nm7 ft.lbs.
7 ft.lbs.\
.- .-.../A- Q/-s+: 11 ft.lbs.
120-nng
‘3, ;
%
;;
Water01 LO21
7
i2o-IjONmY rt.lDS.
87
- 94 ft.lbs.
76 - 83 ft.lbs.d
fl (Turbo)i20-130 Nm87 - 94 ftlbs.(Non-turbo)105-115Nm76 - 83 ft.lbs.Removal steps
I. Pipe assembly
2. Blow-by hose
90
Nm3. Center cover (Front bank)
4. Spark plug cable
HI 5. Rocker cover4* l a
I
6. Intake camshaft sprocket7. Timing belt rear cover (Cent
7.----A//OlFOO218. Ignition coil9. Connection of heater hose10. Connection of water hoses
Rocker coverIOmm
410mm(.4 in.)1.4 in.)
OlA004;
Sealant: 3M ATD Part
No. 8660 or equivalent
.er)
tl-urbo>11. Connection of radiator hose
12. Thermostat housing
13. Connection of water inlet pipe** l + 14. Cylinder head assembly** 15. Cylinder head gasket
(Front bank)TSB Revision

COOLINGCONTENTS
M14AA..
ENGINE COOLANT TEMPERATURE GAUGE
UNIT, ENGINE COOLANT TEMPERATURESENSOR AND ENGINE COOLANT
TEMPERATURE SWITCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.__15
RADIATOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SERVICE ADJUSTMENT PROCEDURES . . . . . . . .7Cap Pressure Test
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.......7Engine Coolant Concentration Test
. . . . . . . . . . . . . . . .‘7
L,Engine Coolant Leak Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . .7Engine Coolant Replacement
. . . . . . . . . . . . . . . . . . . . . . . .7
SPECIFICATIONS. . . . . . . . . . . . .._.................................General Specifications
. ..___....___._...___.__............Lubricant
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.................._........Sealant and Adhesive
. . . . . . . . . . . . . . . . .._...........Service Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . .
THERMOSTAT. . . ..__......................_.._...................
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._...No Rise in Temperature
Overheat
WATER PUMP, WATER PIPE AND WATER
HOSE. . . . _......_........_ _.._ .._..... . . . . . . . . . . . ._. . . . . . . . . . . . . . . . .
2
2
2
3
2
11
3
13

14-2COOLING - SDecifications
SPECIFICATIONSGENERAL SPECIFICATIONSMMCA..
Items
Cooling method
Radiator
Type
Radiator fan motor
Type
Water pump
Type
Thermostat
Type
Identification markSpecifications
Water-cooled, pressurized, forced circulationwith electrical fan
Pressurized corrugated fin type
Direct current ferrite type
Centrifugal impeller type
Wax type with jiggle valve
76.5 (Stamped on flange)
dSERVICE SPECIFICATIONS
Items
Standard valueSpecifications
Range of coolant antifreeze concentration%30-60
Thermostat
Valve opening temperature of thermostat
“C (“F)
Full-opening temperature of thermostat“C (“F)
Opening pressure of cap high pressure valvekPa (psi)
Therm0 sensor (on radiator) operating temperature

OFF-t ON“C (“F)
ON -+ OFF“C (“F) condenser fan-Vehicles with air conditioner>
OFF-ON“C (“F)
ON + OFF“C (“F)
Limit
76.5 (170)
90
(I 94) or more
75-105(11-15)81-89
(178- 192)77(171)orless
91-99
(196-210.)
87 (189) or less
Opening pressure cap high pressure valve
kPa (psi)65 (9.2)LUBRICANT
MlQCD- -
ItemSpecified lubricantQuantity
Engine coolantlit. (qts.)High quality ethylene glycol8.0 (8.5).
antifreeze coolant
‘d
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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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14-4COOLING - Troubleshooting
CIRCUIT DIAGRAM
FUSIBL
RADIATOR
FAN ASSEMBLY
(RADIATOR
,
FAN MOTOR>r{
!&w
F
A-04X ,---LINK0
J
0A
j
IGNITION
J/B
lxI
ti
51.: ,A-07X
J1
>II
ticpLi6
m
R&
b3
,2L-R1
RADIATOR FAN ASSEMBLYL!a ml
T
X35-AC-NWOl-NY
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COOLING - Troubleshootina14-5
i
L
@2L-R
:---I
I
I
I
I
III1 nI
I
1 6IIIII
I
I
I
I
I
I
I
I
ii
II
! cI1
I--@
G-B
FUSIBLELINK@
_------ __._ -_--
L-
AIR CONDITIONER
COMPRESSOR LOCK
CONTROLLERRADIATOR
FAN MOTOR
RELAYCLO)
A-36
A-45
@!A
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14-6COOLING - Troubleshooting.TROUBLESHOOTING HINTS
1. Neither the radiator fan nor condenser fan
rotate at all.
l Check fusible link No. 5.
2. Only the condenser fan does not operate.
l Check dedicated fuse No. 8.
3. The radiator fan and condenser fan do not
operate in the low speed mode, but operate
otherwise.
(1) The A/C compressor magnet clutch does not
enter the “ON” state.
l Check whether the output of the auto
compressor control unit is available.
NOTEFor troubleshooting of the air conditioner
control unit, refer to GROUP 55.
(2) The A/C compressor magnet clutch enters
the “ON” state.
l Check the resistor.
Fan Operating Model Check the radiator fan motor relay (LO)
and condenser fan motor relay (LO).
l Check the therm0 sensor (for radiator
fan).
(3) The radiator fan does not rotate when the ailconditioner switch is turned ON.
l Check the radiator fan motor control
relay.4. The radiator fan and condenser fan do not
operate in the high speed mode, but operate
otherwise.l Check the therm0 sensor (for condenser
fan).
lCheck the radiator fan motor relay (HI) and
condenser fan motor relay (HI).Air
conditionerswitch
Switch conditionsTherm0 sensor
For radiator fan
For condenser fan
ON at 85
k 4°C
ON at 95 t 4°C
(185 f 7°F) or more(203 + 7°F) or more
OFF at 77°C (171°F)
OFF at 87°C (189°F)or less
or lessEngine coolant
temperature switch
(for air conditioner
cut-off) OFF at 115
+3°C (239 2 5°F) or
over, ON at 108°C
(226°F) or lessFan revolving operation
conditionCondenser fan motor
Condenser fan motorRadiator fan motor
operates
In HIGH only
when it receives input
from condenser fan
motor relay (HI) and
U-0).I/I/
OFF
OFF
OFFOFF
IOFFIOFF
ONLOWOFF
ON
HIGHLOW
OFF
OFFLOWLOW
OFF
ONON
LOWLOW
ON
HIGH
ONHIGH
OFF
HIGHLOW
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