2000 LEXUS GS400 engine

ST04Y±01
B02010
Clamp Bracket
Starter
Starter ConnectorStarter Wire
Engine Wire
ST±2
± STARTING (2JZ±GE)STARTER
1620 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
STARTER
COMPONENTS

F02555
Engine Under Cover
x16 Drive BeltPS Vane pump
AssemblyClip
Return Hose
Pressure Feed Tube
Union Bolt

Gasket
58 (590, 43)
49 (500, 36)
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
SR0DQ±01
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
SR±19
2189 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER STEERING VANE PUMP (2JZ±GE)
COMPONENTS

SR0DR±01
R06091
F02556
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
SR±21
2191 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
Remove the 16 bolts.
2. REMOVE DRIVE BELT
Loosen the drive bolt tension by turning the drive belt tensioner
clockwise, and remove the belt.
3. REMOVE RETURN HOSE
Remove the clip and disconnect the hose.
4. REMOVE PRESSURE FEED TUBE
Remove the union bolt and gasket.
5. REMOVE PS VANE PUMP ASSEMBLY
(a) Disconnect the connector.
(b) Remove the 2 bolts.

SR0DV±01
F02556
F02557
Stopper
R06091
SR±28
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
2198 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL PS VANE PUMP ASSEMBLY
(a) Torque the 2 bolts.
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
(b) Connect the connector.
2. CONNECT PRESSURE FEED TUBE
Torque the union bolt over a new gasket.
HINT:
Make sure that the stopper of the tube is touching the PS vane
pump body, as shown, before torquing the bolt.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
3. CONNECT RETURN HOSE
Connect the hose with the clip.
4. INSTALL DRIVE BELT
Loosen the drive belt tension by turning the drive belt tensioner
clockwise, and install the belt.
5. INSTALL ENGINE UNDER COVER
Tighten the 16 bolts.
6. BLEED POWER STEERING SYSTEM
(See page SR±3)

SR0DG±01
R07281
Normal Abnormal
± STEERINGPOWER STEERING FLUID
SR±3
2173 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER STEERING FLUID
BLEEDING
1. CHECK FLUID LEVEL
(See page SR±4)
2. JACK UP FRONT OF VEHICLE AND SUPPORT IT
WITH STANDS
3. TURN STEERING WHEEL
With the engine stopped, turn the wheel slowly from lock to lock
several times.
4. LOWER VEHICLE
5. START ENGINE
Run the engine at idle for a few minutes.
6. TURN STEERING WHEEL
(a) With the engine at idling, turn the wheel to left or right full
lock position and keep it there for 2±3 seconds, then turn
the wheel to the opposite full lock position and keep it
there for 2±3 seconds.
(b) Repeat (a) several times.
7. STOP ENGINE
8. CHECK FOR FOAMING OR EMULSIFICATION
If the system has to be bled twice specifically because of foam-
ing or emulsification, check for fluid leaks in the system.
9. CHECK FLUID LEVEL
(See page SR±4)

SR0DH±01
F03835
R07281
Normal Abnormal
R11361
5 mm (0.2 in.) or less
Engine Idling Engine Stopped SR±4
± STEERINGPOWER STEERING FLUID
2174 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. CHECK FLUID LEVEL
(a) Keep the vehicle level.
(b) With the engine stopped, check the fluid level in the oil
reservoir.
If necessary, add fluid.
Fluid: ATF DEXRON® II or III
HINT:
Check that the fluid level is within the HOT LEVEL range on the
reservoir cap dipstick.
If the fluid is cold, check that it is within the COLD LEVEL range.
(c) Start the engine and run it at idle.
(d) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature: 80°C (176°F)
(e) Check for foaming or emulsification.
If there is foaming or emulsification, bleed power steering sys-
tem. (See page SR±3)
(f) With the engine idling, measure the fluid level in the oil
reservoir.
(g) Stop the engine.
(h) Wait a few minutes and remeasure the fluid level in the oil
reservoir.
Maximum fluid level rise: 5 mm (0.20 in.)
If a problem is found, bleed power steering system.
(See page SR±3)
(i) Check the fluid level.

F03674
SST
IN
OUT
Pressure Feed Tube Attachment 2JZ±GE: 1UZ±FE:
Attachment
OUT IN Pressure Feed Tube
± STEERINGPOWER STEERING FLUID
SR±5
2175 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. CHECK STEERING FLUID PRESSURE
(a) 1UZ±FE:
Remove the air cleaner inlet.
(b) 1UZ±FE:
Remove the air cleaner assembly with air cleaner hose.
(See page SR±31)
(c) Disconnect the pressure feed tube from the PS vane
pump.
(2JZ±GE Engine: See page SR±21)
(1UZ±FE Engine: See page SR±31)
SST 09631±22020
(d) Connect SST, as shown below.
SST 09640±10010 (09641±01010, 09641±01030,
09641±01060)
NOTICE:
Check that the valve of the SST is in the open position.
(e) Bleed the power steering system.
(See page SR±3)
(f) Start the engine and run it at idle.
(g) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature: 80 °C (176 °F)

Z15498
PS Gear
Closed
SSTPS Vane
Pump Oil
Reservoir
Z15499
PS Gear
SSTPS Vane
Pump Oil
Reservoir
Open
Z15500
PS Gear
SSTPS Vane
Pump Oil
Reservoir
Open Lock Position SR±6
± STEERINGPOWER STEERING FLUID
2176 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(h) With the engine idling, close the valve of the SST and ob-
serve the reading on the SST.
Minimum fluid pressure:
8,336 kPa (85 kgf/cm
2, 1,209 psi)
NOTICE:

Do not keep the valve closed for more than 10 se-
conds.

Do not let the fluid temperature become too high.
(i) With the engine idling, open the valve fully.
(j) Measure the fluid pressure at engine speeds of 1,000 rpm
and 3,000 rpm.
Difference fluid pressure:
490 kPa (5 kgf/cm
2, 71 psi) or less
NOTICE:
Do not turn the steering wheel.
(k) With the engine idling and valve fully opened, turn the
steering wheel to full lock.
Minimum fluid pressure:
8,336 kPa (85 kgf/cm
2, 1,209 psi)
NOTICE:

Do not maintain lock position for more than 10 se-
conds.

Do not let the fluid temperature become too high.
(l) Disconnect the SST.
(m) Connect the pressure feed tube.
(2JZ±GE Engine: See page SR±28)
(1UZ±FE Engine: See page SR±41)
(n) 1UZ±FE Engine:
Install the air cleaner assembly with air cleaner hose.
(See page SR±41)
(o) 1UZ±FE Engine:
Install the air cleaner inlet.
(p) Bleed the power steering system.
(See page SR±3)