coolant LEXUS LS430 2003 Factory User Guide

c. Close the radiator drain plug.
d. Tighten the 2 drain cock plugs.
Torque: 13 Nm (130 kgf cm, 9 ft lbf)
Fig. 12: Loosening Radiator Drain Plug And Drain Cock Plugs

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4.ADD ENGINE COOLANT
a. Slowly fill the cooling system with coolant.
Capacity: 9.5 liters (10.0 US qts, 8.4 lmp. qts)
HINT:
Use of improper coolants may damage the engine cooling system.
Use "TOYOTA Super Long Life Coolant" or similar high quality ethylene glycol based non-
silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid
technology.
New Toyota vehicles are filled with TOYOTA Super Long Life Coolant (color is pink,
premixed ethylene-glycol concentration is approximately 50 % and freezing temperature is -
35° C (-31° F)). When replacing coolant, TOYOTA Super Long Life Coolant is

recommended.
<003200450056004800550059004800030057004b00480003004600520052004f0044005100570003004f004800590048004f0003004c00510056004c0047004800030057004b00480003005500440047004c004400570052005500030045005c0003005300
55004800560056004c0051004a00030057004b00480003004c[nlet and outlet radiator hoses
several times by hand. If the coolant level drops, add coolant.
Fig. 13: Adding Engine Coolant

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b. Slowly pour coolant into the radiator reservoir until it reaches the FULL line.
c. Install the radiator caps to the radiator and radiator reservoir.
d. Bleed the cooling system.
Start the engine, and open the heater water valve.
<00300044004c005100570044004c005100030057004b0048000300480051004a004c0051004800030056005300480048004700030044005700030015000f00130013001300030057005200030015000f001800130013000300350033003000030044005100
470003005a00440055005000030058005300030057004b0048[ engine.
e. Stop the engine, and wait until the engine coolant cools down.
f. Add coolant to the FULL line for the radiator and reservoir.

Fig. 14: Adding Coolant To Full Line For Radiator And Reservoir
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.CHECK FOR ENGINE COOLANT LEAKS
6.INSTALL AIR CLEANER INLET NO.1 (See REPLACEMENT
)
7.INSTALL V-BANK COVER
COMPONENTS

1.DISCONNECT BATTERY NEGATIVE TERMINAL
2.DRAIN ENGINE COOLANT (See REPLACEMENT
)
3.REMOVE ENGINE UNDER COVER NO.1
4.REMOVE RADIATOR ASSY
5.REMOVE TIMING BELT (See REPLACEMENT
)
6.REMOVE WATER INLET HOUSING
a. Disconnect the water hose and remove the 2 bolts, inlet housing and O-ring.
Fig. 18: Disconnecting Water Hose

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7.REMOVE TIMING BELT IDLER SUB-ASSY NO.2 (See OVERHAUL
)
8.REMOVE WATER PUMP ASSY
a. Remove the 5 bolts, water pump and
gasket.

Fig. 21: Installing Water Inlet Housing With Bolts
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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
y<00030046004b00480046004e00030057004b004800030044004c00550003004b0052004f004800030044005100470003005a00440057004800550003004b0052004f004800030049005200550003004600520052004f0044005100570003004f0048004400
4e0044[ge.

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. 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.

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

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

13.REMOVE FAN ASSY
a. Disconnect the radiator reservoir hose from the radiator.
b. Remove the 6 bolts and fan.
14.INSTALL FAN ASSY
a. Install the fan with the 6 bolts.
Torque: 5.0 Nm (51 kgfcm, 44 in.lbf)
b. Connect the radiator reservoir hose to the radiator.
15.INSTALL RADIATOR AND FAN ASSEMBLY
a. Install the 2 radiator lower supports to the radiator.
b. Attach the 2 radiator lower supports on the radiator to the body bracket.
c. Install the radiator and fan assembly with the 2 radiator upper supports and 2 nuts.
Torque: 13.5 N m (138 kgf cm, 10 ft lbf)
d. Connect the cooling fan ECU connector.
16.INSTALL AIR CLEANER ASSY
17.INSTALL AIR CLEANER INLET NO.1
18.REFILL ENGINE COOLANT (See REPLACEMENT
)
19.CHECK FOR ENGINE COOLANT LEAKS
20.INSTALL ENGINE UNDER COVER NO.1
21.CONNECT BATTERY NEGATIVE TERMINAL
OVERHAUL
1.REMOVE PACKING
2.REMOVE RADIATOR CAP SUB-ASSY
3.REMOVE DRAIN PLUG
a. Remove the drain plug.
b. Remove the O-ring.
4.ASSEMBLE SST
SST 09230-01010
a. Install the claw to the overhaul handle, inserting it in the hole in part A as shown in the illustration
b. While gripping the handle, adjust the stopper bolt so that dimension B is as shown in the
illustration.

HINT:
The installation procedures are the removal procedures in reverse order. However, only installation procedures
requiring additional information are included.
1.DRAIN ENGINE COOLANT FROM RADIATOR (See REPLACEMENT
)
2.REMOVE AIR CLEANER INLET NO.1
3.REMOVE AIR CLEANER ASSY (See REPLACEMENT
)
4.DISCONNECT RADIATOR HOSE NO.1
5.REMOVE FAN ASSY
a. Disconnect the connector.
b. Remove the 6 bolts and fan.
6.REMOVE COOLING FAN ECU
a. Disconnect the 2 connectors.
b. Remove the 2 screws and ECU.
7.REMOVE FAN
a. Remove the 2 nuts and 2 fans.
8.REMOVE COOLING FAN MOTOR
a. Disconnect the 2 wires from the fan shroud.
b. Remove the 6 screws and 2 cooling fan motors.