2003 LEXUS LS430 radiator

LS430 SPECIFICATIONS INDEX
SystemSpecification/Procedure
Air Conditioning
ServiceSERVICE DATA
TorqueTORQUE SPECIFICATION
Axle Nut/Hub Nut
Front69 N.m (700 kgf.cm, 51 ft.lbf)
Rear290 N.m (2,960 kgf.cm, 214 ft.lbf)
BatteryNA
Brakes
Bleeding
SequenceBLEEDING
Disc BrakesSERVICE DATA
TorqueTORQUE SPECIFICATION
Charging
GeneratorSERVICE DATA
TorqueTORQUE SPECIFICATION
Drive Belts
AdjustmentREPLACEMENT
Belt RoutingDRIVE BELT
Engine Cooling
General Service
SpecificationsSERVICE DATA
Radiator Cap
PressureStandard Value
93 to 123 kPa (0.95 to 1.25 kgf/cm
2 , 13.5 to 17.8 psi)
Minimum Standard Value
78 kPa (0.8 kgf/cm
2 , 11.4 psi)
Thermostat R & ITHERMOSTAT
Water Pump R &
IWATER PUMP
Engine Mechanical
CompressionSERVICE DATA
Oil Pressureat idle, 29 kPa (0.3 kgf.cm2 , 43 psi) or more
at 3,000 rpm, 294 to 588 kPa (3.0 to 6.0 kgf.cm
2 , 43 to 85 psi)
OverhaulSERVICE DATA
TorqueTORQUE SPECIFICATION

Clean both sealing surfaces with a non-residue solvent.
Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must
be removed and reapplied.
ADJUSTMENT
1.BEFORE TRANSMISSION FILL
This transmission requires Toyota Genuine ATF WS transmission fluid.
After servicing the transmission, you must refill the transmission with the correct amount of fluid.
Fig. 1: Identifying Transmission Case Cover Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Maintain the vehicle in a horizontal position while adjusting fluid level.
Proceed to step 2 if you replaced the transmission pan, drain plug, valve body and/or torque
converter.
Proceed to step 3 after removing the two bolts, transmission case cover and refill plug if you
replaced the transmission hose, output shaft oil seal and/or radiator.

Fig. 3: Identifying Overflow Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.TRANSMISSION PAN FILL
a. Remove the refill plug and overflow plug.
b. Fill the transmission through the refill hole until fluid begins to trickle out of the overflow tube.
c. Reinstall the overflow plug.
Fig. 4: Identifying Overflow Tube

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3.TRANSMISSION FILL
a. Fill the transmission with the correct amount of fluid as listed in the table below.
b. Reinstall the refill plug to avoid fluid splash.
TRANSMISSION FLUID REFERENCE
Performed RepairFill Amount
Radiator removal0.7 liters (0.74 US qts, 0.61 Imp. qts)
Transmission hose and pipe removal0.6 liters (0.63 US qts, 0.53 Imp. qts)

ON-VEHICLE INSPECTION
1.CHECK COOLING SYSTEM FOR LEAKS
a. Fill the radiator with coolant and attach a radiator cap tester.
Fig. 1: Checking Cooling System For Leaks

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Warm up the engine.
c. Using a radiator cap tester, increase the pressure inside the radiator to 137 kPa (1.4 kgf/cm
2, 19.9

psi), and check that the pressure does not drop.
If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found,
check the heater core, cylinder block and head.
2.CHECK ENGINE COOLANT LEVEL AT RESERVOIR
a. Check that the engine coolant level is between the LOW and FULL lines when the engine is cold.
If the engine coolant is low, check for leaks and add "TOYOTA Super Long Life Coolant" to the
FULL line.
If "TOYOTA Super Long Life Coolant" is not available, use a similar high quality ethylene glycol
based non-silicate, non-amino, non-nitrite and non-borate coolant with long-life hybrid organic acid
technology. Do not substitute plain water for engine coolant.
3.CHECK ENGINE COOLANT QUALITY
a. Remove the radiator cap.
b. Check if there are any excessive deposits of rust or scale around the radiator cap and radiator filler
hole, Also, the coolant should be free from oil.
HINT:
If excessively dirty, clean the coolant passage and replace the coolant.
c. Reinstall the radiator cap.
INSPECTION
1. INSPECT THERMOSTAT
HINT:
The thermostat is stamped with the valve openin
g temperature.

Fig. 4: Checking Valve Lift
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.INSPECT RADIATOR CAP SUB-ASSY

a. Using a radiator cap tester, slowly pump the tester and check that air is being released from the
vacuum valve.
Fig. 5: Measuring Relief Valve Opening Pressure

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Pump speed: 1 push every 3 seconds or more
If air is not coming from the vacuum valve, replace the reservoir cap.
b. Pump the tester and measure the relief valve opening pressure.
Pump speed: 1 push within 1 second
Standard opening pressure:

Fig. 11: Measuring resistance of switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE V-BANK COVER
2.REMOVE AIR CLEANER INLET NO.1 (See REPLACEMENT
)
3.DRAIN ENGINE COOLANT
a. Remove the 2 radiator caps from the radiator reservoir and radiator.
b. Loosen the radiator drain plug and 2 drain cock plugs, then drain the coolant.