LEXUS LS430 2003 Factory Repair Manual

Fig. 20: Installing Water Inlet Housing
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
10.INSTALL WATER INLET HOUSING
a. Install a new O-ring.
b. Apply soapy water to the O-ring.
c. Apply seal packing to the groove of the water inlet housing as shown in the illustration.
Seal packing: Part No. 08826-00100 or equivalent
d. Install the water inlet housing with the 2 bolts. Then connect the water hose.
Bolt length:
75 mm (2.95 in.) for bolt A
25 mm (0.98 in.) for bolt B

Fig. 21: Installing Water Inlet Housing With Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
11.INSTALL TIMING BELT IDLER SUB-ASSY NO.2 (See OVERHAUL
)
12.INSTALL TIMING BELT (See REPLACEMENT
)
13.INSTALL RADIATOR ASSY (See REPLACEMENT
)
14.REFILL ENGINE COOLANT (See REPLACEMENT
)
15.CONNECT BATTERY NEGATIVE TERMINAL
16.CHECK FOR ENGINE COOLANT LEAKS (See ON
-VEHICLE INSPECTION )
17.INSTALL ENGINE UNDER COVER NO.1
INSPECTION
1.INSPECT WATER PUMP ASSY
a. Visuall
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If leakage is found, replace the water pump and timing belt.
b. Turn the pulley, and check that the water pump bearing moves smoothly and quietly.
If it moves roughly or noisily, replace the water pump.
Fig. 22: Inspecting Water Pump Assy

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REPLACEMENT
1.REMOVE AIR CLEANER INLET NO.1 (See REPLACEMENT
)
2.DRAIN ENGINE COOLANT (See REPLACEMENT
)
3.REMOVE THERMOSTAT
a. Remove the 3 nuts and disconnect the water inlet from the water inlet housing.
b. Remove the thermostat.
c. Remove the
gasket from the thermostat.

Fig. 23: Removing Nuts
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4.INSTALL THERMOSTAT
a. Install a new gasket to the thermostat.
b. Insert the thermostat into the water inlet housing with the jiggle valve facing straight upward.
HINT:
The
jiggle valve may be set within 30° of either side of the prescribed position.

Fig. 24: Installing New Gasket To Thermostat
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c. Install the water inlet with the 3 nuts.
Torque: 19 N m (195 kgf cm, 14 ft lbf)

Fig. 25: Installing Water Inlet With Nuts
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5.REFILL ENGINE COOLANT (See REPLACEMENT
)
6.CHECK FOR ENGINE COOLANT LEAKS (See ON
-VEHICLE INSPECTION )
7.INSTALL AIR CLEANER INLET NO.1 (See REPLACEMENT
)
ON-VEHICLE CLEANING
1.INSPECT FINS BLOCKAGE
a. Check that the radiator and condenser are not blocked with leaves, dirt, or insects. Clean the hose
connection.
If the fins are clo
gged, wash them with water or a steam cleaner and dry with compressed air.

Fig. 26: Inspecting Fins Blockage
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STANDARD SPECIFICATION
If the fins are bent, straighten them with a screwdriver or pliers.
Never apply water directly onto the electronic components.
COMPONENTS
Injection DistanceInjection Pressure
300 mm(11.81 in.)2,942 to 4,903 kPa (30 to 50 kgf cm2 , 427 to 711 psi)
500 mm (19.69 in.)4,903 to 7,845 kPa (50to80kgf cm2 , 711 to 1,138 psi)

Fig. 27: Identifying Radiator Assy Component (1 Of 2)
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Fig. 28: Identifying Radiator Assy Component (2 Of 2)
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REPLACEMENT
1.DISCONNECT BATTERY NEGATIVE TERMINAL
2.REMOVE ENGINE UNDER COVER NO.1

3.REMOVE AIR CLEANER INLET NO.1
4.DRAIN ENGINE COOLANT (See REPLACEMENT
)
5.REMOVE V-BANK COVER
6.REMOVE INTAKE AIR CONNECTOR PIPE
7.DISCONNECT RADIATOR HOSE NO.1
8.DISCONNECT RADIATOR HOSE NO.2
9.DISCONNECT OIL COOLER INLET TUBE NO.1
10.DISCONNECT OIL COOLER OUTLET TUBE NO.1
11.REMOVE AIR CLEANER ASSY
12.REMOVE RADIATOR AND FAN ASSEMBLY
a. Disconnect the cooling fan ECU connector.
b. Remove the 2 nuts and 2 radiator upper supports.
c. Remove the radiator and fan assembly.
d. Remove the 2 radiator lower supports.
Fig. 29: Removing Nuts And Radiator Upper Supports

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