Lexus SC300 / Lexus SC400. Manual — part 698
EQUIPMENT
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Part Name
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Note
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Caliper gauge
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Hydraulic pump, Hydraulic motor
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Micrometer
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Hydraulic pump, Hydraulic motor
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Precision straight edge
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Hydraulic pump, Hydraulic motor
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Pressure gauge
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Radiator cap tester
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Thermometer
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Torque wrench
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Vernier caliper
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Hydraulic pump
COOLANT
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Item
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Capacity
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Classification
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Item
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Liters
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US qts
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lmp. qts
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Classification
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Engine coolant
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10.8
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11.4
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9.5
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Ethylene–glycol base
LUBRICANT
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Item
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Capacity
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Classification
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Cooling fan fluid
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ATF DEXRON
II
SSM (SPECIAL SERVICE MATERIALS)
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Part Name
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Part No.
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Use etc.
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Seal packing 1282B,
Three bond 1282B or equivalent
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08826–00100
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Water pump, Water inlet housing
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COOLIING SYSTEM
Preparation
CO–5
CHECK AND REPLACEMENT OF
ENGINE COOLANT
1.
CHECK ENGINE COOLANT LEVEL AT RESERVE TANK
The coolant level should be above the ”COLD LEVEL” at nor-
mal temperature (20
°
C (68
°
F)).
If low, check for leaks and add coolant up to the ”COLD LEV-
EL”.
2.
CHECK ENGINE COOLANT QUALITY
There should not be any excessive deposits of rust or scales
around the radiator cap or reservoir tank filler hole, and the
coolant should be free from oil.
If excessively dirty, clean the coolant passages and replace
the coolant.
3.
REPLACE ENGINE COOLANT
(a) Remove the radiator cap from the reservoir tank.
CAUTION: To avoid the danger of being burned, do not
remove the cap while the engine and radiator are still hot,
as fluid and steam can be blown out under pressure.
(b) Remove the filler plug from the water inlet housing.
(c) Loosen the three drain plugs on the radiator and
cylinder block, drain the coolant from the radiator and
engine.
(d) Clean the coolant passages.
(e) Close the three drain plugs.
Torque (Engine drain plug):
18 N
⋅
m (180 kgf
⋅
cm, 13 ft
⋅
lbf)
CO–6
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COOLIING SYSTEM
Check and Replacement of Engine Coolant
(f) Slowly add coolant to water inlet housing until it is full.
•
Use a good brand of ethylene–glycol base coolant,
mixed according to the manufacturer’s directions.
•
Using coolant which includes more than 50%
ethylene–glycol (but not more 70%) than is
recommended.
NOTICE:
•
Do not use alcohol type coolant.
•
The coolant should be mixed with demineralized water or
distilled water.
Capacity (w/ Heater):
10.8 liters (11.4 US qts, 9.5 lmp. qts)
(g) Reinstall a new gasket and filler plug to the water inlet
housing.
Torque: 44 N
⋅
m (450 kgf
⋅
cm, 33 ft
⋅
lbf)
(h) Slowly add coolant to reservoir tank until it is full.
(i)
Reinstall the radiator cap.
(j)
Bleed the cooling system.
•
Start the engine, and open the heater water valve.
•
Maintain the engine speed at 2,000 rpm, and warm
up the engine.
(k) Check for leaks.
(l)
Recheck the coolant level and refill as necessary.
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COOLIING SYSTEM
Check and Replacement of Engine Coolant
CO–7
WATER PUMP
COMPONENTS FOR REMOVAL AND
INSTALLATION
REMOVAL OF WATER PUMP
1.
REMOVE TIMING BELT
(See steps 1 to 35 on pages
to 43)
2.
REMOVE RH IGNITION COIL
(a) Disconnect the ignition coil connector.
(b) Remove the two bolts and ignition coil.
3.
REMOVE WATER INLET AND INLET HOUSING
(a) Disconnect the water by–pass hose from the water inlet
housing.
CO–8
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COOLIING SYSTEM
Water Pump
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