radiator LEXUS GS400 2000 Service Service Manual

EM0DG±03
A09759
Air Cleaner,
MAF Meter and
Intake Air Resonator
Assembly
PCV Hose
Hood SupportHood
MAF Meter
Connector
Engine Wire
ClampWasher Hose
Accelerator Cable PS Air Hose
EVAP Hose
Air Cleaner Inlet
Radiator Lower Hose
Engine Under CoverFront Suspension
Member Brace x 6
x 18 Radiator Upper Hose
Upper Radiator
Drive Belt
ECM Outlet Duct
ECT Switch Connector
Connector
Radiator Assembly Radiator Lower Support
Oil Cooler Hose for A/TEVAP Hose
Heater
Hose
Support
Electric Cooling Fan Engine Cover
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±59
1413 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ENGINE UNIT
COMPONENTS

EM0DH±05
A02753
EVAP
Hose
Clamp
MAF Meter
Connector
A02751
EM±62
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1416 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE HOOD
NOTICE:
Be careful not to damage the body or glass with the hood
end.
2. REMOVE ENGINE UNDER COVER
3. DRAIN ENGINE COOLANT
4. DRAIN ENGINE OIL
5. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
6. REMOVE AIR CLEANER INLET
7. REMOVE AIR CLEANER, MAF METER AND INTAKE
AIR RESONATOR ASSEMBLY
(a) Disconnect the MAF meter connector.
(b) Disconnect the engine wire clamp from the air cleaner
case.
(c) Disconnect the EVAP hose from the air cleaner case.
(d) Disconnect the PS air hose from the No.4 timing belt cov-
er.
(e) Disconnect the PCV hose from the No.2 cylinder head
cover.
(f) Loosen the hose clamp bolt holding the intake air resona-
tor to the throttle body.
(g) Remove the 3 bolts, the air cleaner, MAF meter and intake
air resonator assembly.
8. DISCONNECT ACCELERATOR CABLE FROM EN-
GINE
9. REMOVE RADIATOR ASSEMBLY (See page CO±18)
10. REMOVE DRIVE BELT (See page CH±1)
11. REMOVE FRONT SUSPENSION MEMBER BRACE
Remove the 6 bolts and brace.

A02765
EVAP Hose
A02751
A02753
EVAP
Hose Clamp
MAF Meter
Connector
EM±72
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1426 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(g) Connect the heated oxygen sensor (bank 1 sensor 1)
connector.
(h) Connect the heated oxygen sensor (bank 1 sensor 2)
connector.
(i) Connect the EVAP hose to the pipe (from charcoal canis-
ter).
(j) Connect the heater hose to the heater pipe.
(k) Connect the heater hose to the water bypass pipe.
(l) Connect the ground strap to the dash panel.
(m) Connect the fuel inlet hose to the fuel pipe support.
Torque: 29 N´m (300 kgf´cm, 22 ft´lbf)
(n) Connect the starter wire to the terminal and manifold stay.
(o) Connect the ground wire to the floor.
16. INSTALL FRONT SUSPENSION MEMBER BRACE
Install the brace with the 6 bolts.
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
17. INSTALL DRIVE BELT (See page CH±1)
18. INSTALL RADIATOR ASSEMBLY (See page CO±23)
19. CONNECT ACCELERATOR CABLE TO ENGINE
20. INSTALL AIR CLEANER, MAF METER AND INTAKE
AIR CONNECTOR PIPE ASSEMBLY
(a) Connect the intake air resonator to the throttle body.
(b) Install the air cleaner case with the 3 bolts.
(c) Tighten the hose clamp bolt holding the intake air resona-
tor to the throttle body.
(d) Connect the MAF meter connector.
(e) Connect the engine wire clamp to the air cleaner case.
(f) Connect the EVAP hose to the air cleaner case.
(g) Connect the PS air hose to the No.4 timing belt cover.
(h) Connect the PCV hose to the No.2 cylinder head cover.
21. INSTALL AIR CLEANER INLET
22. INSTALL ENGINE COVER
Install the engine cover with the 4 nuts.
23. FILL WITH ENGINE COOLANT
24. FILL WITH ENGINE OIL
25. START ENGINE AND CHECK FOR LEAKS
26. INSTALL ENGINE UNDER COVER

B02389
B02390
HEAT METHOD: When the problem seems to occur when the suspect area is heated. 2
NOTICE:3 WATER SPRINKLING METHOD:
(1)
(2)
4 OTHER: When a malfunction seems to occur when electrical load is excessive.When the malfunction seems to occur on a rainy day or in a
high±humidity condition. Heat the component that is the likely cause of the malfunction
with a hair dryer or similar object. Check to see if the malfunction
occurs.
Sprinkle water onto the vehicle and check to see if the malfunc-
tion occurs.
Turn on all electrical loads including the heater blower, head
lights, rear window defogger, etc. and check to see if the mal-
function occurs.ON HINT:
If a vehicle is subject to water leakage, the leaked water may
contaminate the ECU. When testing a vehicle with a water leak-
age problem, special caution must be taken.
Malfunc-
tion
Do not heat to more than 60 °C (140 °F). (Temperature
is limited not to damage the components.)
Do not apply heat directly to parts in the ECU. (1)
(2)
Never sprinkle water directly into the engine compart-
ment, but indirectly change the temperature and hu-
midity by applying water spray onto the radiator front
surface.
Never apply water directly onto the electronic compo-
nents. NOTICE: IN±26
± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
26 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

MA003±06
MA±4
± MAINTENANCEUNDER HOOD
47 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
UNDER HOOD
GENERAL MAINTENANCE
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. WINDSHIELD WASHER FLUID
Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
Check that the coolant level is between the ºFULLº and ºLOWº lines on the see±through reservoir.
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
5. BATTERY ELECTROLYTE LEVEL
Check that the electrolyte level of all battery cells is between the upper and lower level lines on the case.
6. BRAKE FLUID LEVEL
Check that the brake fluid levels are near the upper level line on the see±through reservoirs.
7. ENGINE DRIVE BELT
Check drive belt for fraying, cracks, wear or oiliness.
8. ENGINE OIL LEVEL
Check the level on the dipstick with the engine turned off.
9. POWER STEERING FLUID LEVEL

Check the level on the dipstick.

The level should be in the ºHOTº or ºCOLDºrange depending on the fluid temperature.
10. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking brake applied, shift the selector into all positions from ºPº to ºLº,
and then shift into ºPº position.
(c) Pull out the dipstick and wipe off the fluid with a clean rag. Re±insert the dipstick and check that the
fluid level is in the HOT range.
(d) Do this check with the fluid at normal driving temperature (70 ± 80°C, 158 ± 176°F).
HINT:
Wait until the engine cools down (approx. 30 min.) before checking the fluid level after extended driving at
high speeds, in hot weather, in heavy traffic or pulling a trailer.
11. EXHAUST SYSTEM
If any change in the sound of the exhaust or smell of the exhaust fumes is noticed, have the cause located
and corrected.

PP0TK±01
±
PP±13
65 Author: Date:
COOLING (2JZ±GE)
SST (Special Service Tools)
09230±01010Radiator Service Tool Set
09231±14010Punch

PP0TM±01
±
PP±15
67 Author: Date:
EQUIPMENT
HeaterThermostat, ECT switch
Radiator cap tester
Rubber hose (Inside diameter 6 ± 8 mm)
Soft ± faced hammer
ThermometerThermostat, ECT switch
Torque wrench
Vernier calipers

SS0FM±01
±
SS±13
169 Author: Date:
COOLING (2JZ±GE)
SERVICE DATA
ThermostatValve opening temperature
Valve lift at 95°C (203°F)80 ± 84°C (176 ± 183°F)
8.5 mm (0.335 in.) or more
Radiator capRelief valve opening pressure STD
Minimum93 ± 123 kPa (0.95 ± 1.25 kgf/cm2, 13.5 ± 17.8 psi)
78 kPa (0.8 kgf/cm2, 11.4 psi)
Electric
cooling fanRotating amperage at 20°C (68°F)8.5 ± 11.5 A

SS0FN±01
SS±14
±
170 Author: Date:
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
Engine drain plug x Cylinder block3030022
Water pump x Cylinder block2121015
Water pump x No.2 water bypass pipe2121015
Generator x Water pump4040030
Generator x Cylinder block4040030
Water bypass outlet x Cylinder head9.09080 in.´lbf
Water pump pulley x Water pump1414010
Water inlet x Water pump9.09080 in.´lbf
Oil cooler x Radiator lower tank8.38574 in.´lbf
Oil cooler x Oil cooler pipe14.715011
Upper radiator support x Body13.513510
Electric cooling fan x Radiator5.05044 in.´lbf

SS0FF±03
SS±64
± SERVICE SPECIFICATIONSBODY
220 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
BODY
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
FRONT BUMPER±±±
Front bumper cover x Body5.45548 in.´lbf
Reinforcement x Body2930022
REAR BUMPER±±±
Reinforcement x Body2829021
HOOD±±±
Hood support x Hood2222516
Hood x Hood hinge2626519
Radiator support upper seal x Door lock8.08271
Hood lock nut x Hood lock8.08271
FRONT DOOR±±±
Outside handle x Door panel5.55649 in.´lbf
Door lock striker x Door panel2323517
Door hinge x Body32.533124
Door hinge x Door panel32.533124
Window regulator x Door panel1111 28
Door lock x Door panel5.55649 in.´lbf
REAR DOOR±±±
Outside handle x Door panel5.55649 in.´lbf
Door hinge x Door panel32.533124
Door hinge x Body32.533124
Window regulator x Door panel5.45548 in.´lbf
Door lock x Door panel5.45548 in.´lbf
OUTSIDE REAR VIEW MIRROR±±±
Outside rear view mirror x Door panel5.45548 in.´lbf
LUGGAGE COMPARTMENT DOOR AND HINGE±±±
Door hinge x Door panel8.08271 in.´lbf
Door lock striker x Body5.55649 in.´lbf
Door hinge x Body12.51279
FUEL LID±±±
Lock retainer x Opening lid5.55649 in.´lbf
Fuel lid lock assembly x Body Luggage side nut:5.55649 in.´lbf
Fuel lid side nut:8.08271 in.´lbf
FRONT WIPER AND WASHER±±±
Wiper arm x Wiper link2222016
Wiper link x Body5.45548 in.´lbf
SLIDING ROOF±±±
Drive rail x Bracket5.55649 in.´lbf
Sliding roof housing x Body5.55649 in.´lbf
Drive rail x Bracket8.08271 in.´lbf
Bracket x Body8.08271 in.´lbf
Sliding roof glass x Drive gear5.55649 in.´lbf