radiator cap LEXUS GS400 2000 Service Repair Manual

AC0WK±01
I02360
I02361
AC±24
± AIR CONDITIONINGAIR CONDITIONING UNIT
2709 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
3. DISCONNECT LIQUID TUBE AND SUCTION HOSE
FROM A/C UNIT
Remove the bolt and slide the plate, then disconnect the both
tubes.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, please refer to the following item.
Lubricate 2 new O±rings with compressor oil and install them
to the tubes.
4. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Grips the claws of the hose clip and slide the hose clip
along the hose.
(b) Disconnect the water hose.

AC22B±01
I09253
I09252I10327

O±Ring Liquid TubeDischarge Hose
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable partAir Cleaner Assembly
Air Cleaner Duct Condenser
Bracket
Condenser
Dryer
Filter
Cap
O±Ring
10 (100, 7)
10 (100, 7)
12.3 (125, 9)
Compressor oil ND±OIL 8 or equivalent
Radiator Upper Support
± AIR CONDITIONINGCONDENSER
AC±47
2732 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

AC0X0±01
I02397
I02398
I02399
AC±48
± AIR CONDITIONINGCONDENSER
2733 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount : 600 ± 50 g (21.16 ± 1.76 oz.)
2. REMOVE THESE PARTS:
(a) Air cleaner duct
(b) Air cleaner assembly
(c) 2 radiator upper supports
3. DISCONNECT DISCHARGE HOSE AND LIQUID TUBE
Remove the 2 bolts and disconnect the hose and tube.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, please refer to the following item.
Lubricate 2 new O±rings with compressor oil and install them
to the hose and tube.
4. REMOVE CONDENSER
(a) Remove the 4 bolts and 2 brackets.
(b) Push the radiator toward engine.
(c) Push the condenser toward radiator and pull it upward.
HINT:
At the time of installation, please refer to the following item.
If condenser is replaced, add compressor oil to the condenser.
Add 40 cc (1.4 fl. oz)
Compressor oil: ND ± OIL 8 or equivalent

AC0X2±01
I02400
I02401
SST
± AIR CONDITIONINGEVAPORATOR
AC±51
2736 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
EVAPORATOR
REMOVAL
1. REMOVE A/C UNIT
(See page AC±24)
2. REMOVE HEATER RADIATOR
(See page AC±55)
3. REMOVE AIR MIX SERVOMOTOR PASSENGER SIDE
(a) Disconnect the connector.
(b) Remove the 3 screws and servomotor.
4. REMOVE TUBE AND ACCESSORY
(a) Pry out packing.
HINT:
At the time of installation, please refer to the following item.
Do not reuse the packing.
(b) Using SST, remove the 2 bolts and the tube and accesso-
ry.
SST 07110±61050
Torque: 4.1 N´m (42 kgf´cm, 36 in.´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, please refer to the following item.
Lubricate 2 new O±rings with compressor oil and install them
to the tube.
(c) Remove screw and drain pipe.

AC0Y3±01
I04719
Air Cleaner AssemblyRadiator Reservoir
Tank Cap
Cooling Fan Assembly
Air Cleaner
DuctUpper Radiator Hose
Reservoir Hose
Fan Motor
Fan Motor
Fan Shroud
Fan
Fan
± AIR CONDITIONINGCONDENSER FAN
AC±81
2766 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

AC0Y4±01
AC±82
± AIR CONDITIONINGCONDENSER FAN
2767 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
2. REMOVE THESE PARTS:
(a) Air cleaner duct
(b) Air cleaner assembly
(c) Radiator reservoir tank cap
3. DISCONNECT THESE PARTS:
(a) Upper radiator hose
(b) Reservoir hose
4. REMOVE COOLING FAN
(a) Disconnect the connectors.
(b) Remove the 6 bolts cooling fan.

CO09W±03
± COOLING (2JZ±GE)COOLANT
CO±1
1539 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COOLANT
INSPECTION
1. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
The engine coolant level should be between the ºLOWº and ºFULLº lines, when the engine is cold.
If low, check for leaks and add ºToyota Long Life Coolantº or equivalent up to the ºFULLº line.
2. CHECK ENGINE COOLANT QUALITY
There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole,
and the coolant should be free from oil.
If excessively dirty, replace the coolant.

CO0A7±01
CO1242
Radiator Cap Tester
Radiator Cap
30° or More
B01882
Radiator Cap Tester
± COOLING (2JZ±GE)RADIATOR
CO±15
1553 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ON±VEHICLE INSPECTION
1. REMOVE RADIATOR CAP
Remove the radiator cap from the radiator.
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
2. INSPECT RADIATOR CAP
NOTICE:

If the radiator cap has contaminations, always rinse
it with water.

Before using a radiator cap tester, wet the relief valve
and pressure valve with engine coolant or water.

When performing steps (a) and (b) below, keep the
tester at an angle of over 30° above the horizontal.
(a) Using a radiator cap tester, slowly pump the tester and
check that air is coming from the vacuum valve.
Pump speed: 1 push/(3 seconds or more)
NOTICE:
Push the pump at a constant speed.
If air is not coming from the vacuum valve, replace the radiator
cap.
(b) Pump the radiator cap tester, and measure the relief valve
opening pressure.
Pump speed: 1 push within 1 second
NOTICE:
This pump speed is for the first pump only (in order to close
the vacuum valve). After this, the pump speed can be re-
duced.
Standard opening pressure:
93 ± 123 kPa (0.95 ± 1.25 kgf/cm
2, 13.5 ± 17.8 psi)
Minimum opening pressure:
78 kPa (0.8 kgf/cm
2, 11.4 psi)
HINT:
Use the tester's maximum reading as the opening pressure.
If the opening pressure is less than minimum, replace the radia-
tor cap.
3. INSPECT COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant and attach a radiator cap tes-
ter.
(b) Warm up the engine.
(c) Pump it to 118 kPa (1.2 kgf/cm
2, 17.1 psi), and check that
the pressure does not drop.
If the pressure drops, check the hoses, radiator or water pump
for leaks. If no external leaks are found, check the heater core,
cylinder block and head.
4. REINSTALL RADIATOR CAP

B00917
Radiator Reservoir Hose
Electric Cooling Fan
Assembly
Radiatorx 6
B01859

Packing Upper Tank

O±Ring
Core
Drain Plug

Non±reusable part

Packing

Packing

Packing

Packing

Packing

O±Ring

O±RingPipe
Pipe
Plate Washer Nut
Nut

O±Ring
ECT Switch for Electric
Cooling Fan

O±Ring

O±Ring
Lower Tank
Radiator Cap
Oil Cooler
± COOLING (2JZ±GE)RADIATOR
CO±17
1555 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

CO0AA±01
CO1205
Dimension B
Stopper Bolt
Overhaul HandlePart A
ClawSST
B01865
Lock
PlateSST
Stopper BoltTank
B01867
Ta p
B02033
± COOLING (2JZ±GE)RADIATOR
CO±19
1557 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE PACKINGS
2. REMOVE RADIATOR CAP
3. REMOVE DRAIN PLUG
(a) Remove the drain plug.
(b) Remove the O±ring.
4. REMOVE ECT SWITCH
(a) Remove the ECT switch.
(b) Remove the O±ring.
5. 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 diagram.
(b) While gripping the handle, adjust the stopper bolt so that
dimension B is as shown in the illustration.
Dimension B: 0.2 ± 0.3 mm (0.008 ± 0.012 in.)
NOTICE:
If this adjustment is not done the claw may be damaged.
6. UNCAULK LOCK PLATES
Using SST to release the caulking, squeeze the handle until
stopped by the stopper bolt.
SST 09230±01010
7. REMOVE TANKS AND O±RINGS
Lightly tap the bracket of the radiator (or radiator inlet or outlet)
with a soft±faced hammer, and remove the tank and the O±ring.
8. REMOVE OIL COOLER FROM LOWER TANK
(a) Loosen the nut, and remove the cooler pipe. Remove the
2 cooler pipes.
(b) Remove the 2 nuts and 2 plate washers.
(c) Remove the oil cooler and 2 O±rings.