1990 MITSUBISHI SPYDER cooling

14-2ENGINE COOLING General Information
GENERAL INFORMATION , ,
The cooling system is designed to keep every partthat the heat absorbed by the coolant may be of the engine at appropriate temperature in diated into the air.
er condition the engine may be operated.
The cooling of the water-cooled, pressureThe water pump is of the centrifugal type and is
driven by the
the
forced circulation type in which the water pump crankshaft. .
pressurizes coolant and circulates it throughout th e
engine: If the coolant temperature exceeds the
scribed temperature, the thermostat opens to circu-
late the coolant through the radiator as well so
and is cooled the
CONSTRUCTION DIAGRAM
Engine (Non-turbo)>
Radiator
Radi
.
oil cooler hose and pipe
Engine (Turbo)>
Radiator fan assembly
(Air cooled) oil cooler hose and pipetank
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G e n e r a l
ENGINE COOLING
Engine>
Radiator fan assemblyReserve tank
(Airoilcooler
cooled) oil cooler hose and pipe
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
ThermostatValve opening temperature of Engine (Non-turbo)90.5 (195) thermostat Engine (Turbo) and Engine 82 (180)
Full-opening temperature of Engine (Non-turbo)
102 (216)
thermostat
Engine (Turbo) and Engine95 (203),
Radiator cap valve opening pressure (psi) Engine (Non-turbo)9 4 - 1 2 2 ( 1 4 - 1 8 )
Engine (Turbo) and Engine
LUBRICANT
ItemQuantity
Engine coolant HIGH QUALITY ETHYLENE GLYCOL ANTIFREE ZE COOLANT7.0 (7.4)
SEALANT
ItemSpecified sealant,
Thermostat case Engine (Turbo) and Engine>
Mitsubishi Genuine Parts No. or equivalent:
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E N G I N E C O O L I N G
TROUBLESHOOTING
OVERHEAT
Probable cause
Inoperative electric cooling fan
Water leaks
Faulty electrical motor ,
Faulty radiator fan
Damaged radiator core joint
Corroded or cracked hoses
(radiator hose, heater hose, etc.)
Remedy
Replace
R e p l a c e
Replace
Replace
.
Faulty radiator cap valve or Replace
spring
Cracked intake manifold
Cracked thermostat housing
R e p l a c e
Loose bolts or leaking gasket in
water outlet fitting Torque again or replace gasket
Loose bolts or leaking gasket in
water inlet fitting Torque bolts again or replace gasket
Faulty Loose water pump mounting bolts or
leaking gasket
Loose thermostat housing bolts or
gasket
automatic transaxle oil
operation
Others
or collapsed hose and pipe
Loose hose and pipe connection
engine coolant
Too high an anti-freeze
concentration
Torque bolts again or replace . . .
.
Loose or broken drive belt
Damaged or blocked (insufficiently
ventilated) radiator fins
Faulty thermostat operation. .
Correct
Replace .
Faulty water pump operation .
Water passage clogged with slime orClean
rust deposit or foreign substance, . .
NO RISE IN TEMPERATURE
,
.
Probable cause
Faulty thermostatRemedy
Replace
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ENGINE COOLING Troubleshooting
TROUBLESHOOTING HINTS
Engine (Non-turbo)>
1. Only the radiator fan does not operate. l Check fusible link No. 7.
2. Only the condenser fan does not operate. l Check dedicated fuse No. 9.
3. The radiator fan and condenser fan do’ not operate in the low speed mode, but operate
otherwise.
4. The radiator fan and condenser fan do not
operate in the high speed mode, ‘but
otherwise.
lCheck the radiator fan motor relay and
condenser fan motor relay (HI).
l Check the power-train control module.
l Check the radiator fan motor relay (LO)
and condenser fan motor relay (LO).
l Check the powertrain control module.
Fan Operating Mode
.
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14-6ENGINE COOLING
Engine (Turbo) and Engine>
1. Only the radiator fan does not operate.
l Check fusible link No. 7.
2. Only the condenser fan does not operate.
l Check dedicated fuse No. 9.
3. The radiator fan and condenser fan do not operate in the low speed mode, but operate
otherwise.
l Check the radiator fan motor relay (LO)
and condenser fan motor relay (LO).
l Check the engine control module.
(Refer to GROUP Troubleshooting.)
I -* I.
4. The radiator fan and fan do not
Fan Operating Mode operate in the high speed mode, but
lCheck the, radiator’ fan motor
fan ,
lCheck en
(Refer to,
.
Air conditioning switch
OFF
OFF
OFF
ON
ON
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ENGINE COOLING On-vehicle Service
Engine (Turbo) and
ON-VEHICLE SERVICE
ENGINE COOLANT LEAK CHECK
1. Confirm that the coolant level is. up to the filter
Install a radiator cap tester and apply 160 (23 psi)
pressure, and then check for leakage from
radiator
hose or connections.
Caution
1. After testing, clean up all coolant seepagefrom
areas of leakage.
2.When the tester is removed, be careful not to spill
any coolant.
3.During tester usage, do not deform the filler neck
of the radiator.
2. If leakage is present, repair or replace the app ropriate
part.
RADIATOR CAP VALVE OPENING
CHECK
1.Use ‘a cap adapter to attach the radiator cap to the tester.
2. Increase the pressure until the indicator of the gauge
stops moving..
Standard value:
E n g i n e ( N o n - t u r b o ) >
9 4 - 1 2 2 p s i )
Engine (Turbo) and
psi)
Limit:
Engine (Turbo) and Engine>
65
(9.2 psi)
3.Replace the radiator cap if the reading does not re main
at or above the limit.
NOTE
Be sure that the radiator cap is clean before testing,
since rust or other foreign material on the radiato r cap
seal may cause an improper reading.
ENGINE COOLANT
Refer to GROUP 00 Maintenance
ENGINE COOLANT CONCENTRATION TEST
1 4 1 0 0 1 1 0 0 8 5
Refer to GROUP 00 Recommended
C a p a c i t i e s T a b l e . ,
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14-8ENGINE COOLING, Radiator
RADIATOR
REMOVAL AND INSTALLATION
Engine (Non-turbo)>
Operationl Engine Coolant Draining (Refer to GROUP 00 Maintenance Service.)
2
12 Nm6.7
Radiator removal steps1. Drain plug
2. Radiator cap
3. Overflow tube
4.
tank
5. Reserve tank bracket
6. upper hose 7. h o s e
8. Transaxle cooler hose, tion 10. Radiator assembly
11. Transaxle fluid cooler hose and pipe assembly 12. Lower insulator
13.Condenser fan motor assembly
14.Radiator fan motor assembly15. Fan
16. Radiator fan motor
17. Shroud
Radiator fan motor removal steps
11. Transaxle fluid cooler hose and pipe assembly
with fan motor assembly
Radiator fan motor17. Shroud
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ENGINE COOLING Radiator
Projection
Water outlet fitting water inlet fitting
Engine (Non-turbo)
REMOVAL SERVICE POINTS
RADIATOR UPPER LOWER
HOSE DISCONNECTION
After making mating marks on the hose and the hose
clamp, disconnect the radiator hose.
TRANSAXLE FLUID COOLER
FLUID COOLER HOSE AND PIPE
REMOVAL ,
After removing the hose from the radiator, plug the hose
and the radiator nipple to
dust or
from getting in.,
INSTALLATION SERVICE POINT
RADIATOR LOWER HOSE/RADIATOR UPPER HOSE CONNECTION
(1) each hose as the projection of the water
outlet fitting or water inlet fitting.
(2) Align the mating marks on the radiator hose and hose
clamp, and then connect the radiator hose.
INSPECTION
RADIATOR FAN MOTOR CHECK
(1)Check to be sure that the radiator fan rotates when battery,
voltage is applied between terminals (as shown the
figure).
(2) Check to see that abnormal noises are not
while motor is turning.