LEXUS GS400 2000 Service Repair 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

A09753
Transmission Control Rod
13 (130, 9)
13 (130, 9)
Rear Engine Mounting Member
Fuel Inlet
 Gasket
29 (300, 22)
13.5 (135, 10)25.5 (260, 19)
70 (714, 52)
Hole Plug PS Vane Pump Assembly
PS Pump Rear Stay57.9 (590, 43)
39.2 (400, 29)
65 (660, 48)
65 (660, 48)
35 (360, 26)
26 (265, 19)
52 (530, 38)
57.9 (590, 43)
A/C Compressor
52 (530, 38)
52 (530, 38)
Adjusting Washer
PS Gear Housing
Propeller Shaft
79 (805, 58)
37 (375, 27)
Heat Insulator
Heat Insulator
Adjusting Nut
69 (700, 51)
79 (805, 58)
44 (440, 32)
 Gasket Gasket
Ring
Ring
Center Exhaust Pipe
Front Floor Center Brace
 Gasket
Front Exhaust Pipe
(with Rear TWC)
44 (440, 32)
 Gasket
45 (450, 32)
Heated Oxygen Sensor
(Bank 2 Sensor 2)
44 (440, 32)
N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable part
44 (440, 32)Pipe Support
Bracket
Hose
EM±60
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1414 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

A09754
 GasketEngine Wire
Clamp
Engine
StarterOil Dipstick and Guide for A/T
Starter Wire Hole Plug
N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable part
40 (408, 30)
37 (380, 27)
x 8
 O±Ring
x 4 Pipe Clamp
PNP Switch Connector
Engine Wire
VSS Connector
Solenoid
Connector
Direct Clutch Speed
Sensor Connector
Oil Cooler Pipe for A/T
Exhaust Manifold
Transmission
(with Torque
Converter Clutch)
x 5
Ground Wire
72 (730, 53)
17 mm Bolt

83 (850, 61)x 8
Rear Plate
Drive Plate
48 (490, 35)
x 6
Front Spacer
14 mm Bolt
37 (380, 27)
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±61
1415 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

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.

A02793
Ground Wire
Fuel Inlet Hose
Starter Wire
A02788
Ground Strap
Heater Hose
A02787
Clamp
A02785
A02786
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±63
1417 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
12. DISCONNECT WIRES, CABLE, STRAP, CONNEC-
TORS, HOSES AND CLAMPS
(a) Disconnect the ground wire from the floor.
(b) Disconnect the starter wire from the terminal and manifold
stay.
(c) Disconnect the fuel inlet hose from the fuel pipe support.
(d) Disconnect the ground strap from the dash panel.
(e) Disconnect the heater hose from the heater pipe.
(f) Disconnect the heater hose from the water bypass pipe.
(g) Disconnect the EVAP hose from the pipe (from charcoal
canister).
(h) Disconnect the heater oxygen sensor (bank 1 sensor 1)
connector.
(i) Disconnect the heater oxygen sensor (bank 1 sensor 2)
connector.
(j) Disconnect the generator wire.
(k) Disconnect the engine wire clamp from the wire clip of
generator.
(l) Disconnect the ground cable from the bracket on the cyl-
inder block.
(m) Disconnect the igniter connector.
(n) Disconnect the DLC1.
(o) Disconnect the 2 engine wire clamps from the clamp
brackets.
13. DISCONNECT ENGINE WIRE FROM ECM BOX
(a) Remove the ECM hood and ECM cover.
(b) Disconnect the 3 ECM connectors.
(c) Disconnect the 4 wire harness connectors.
(d) Disconnect the 2 junction connectors.
(e) Disconnect the grommet and engine wire from the ECM
box.

A02823
A01483
A02794
A02791
A02789
Matchmark
Wire Clamp
EM±64
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1418 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
14. DISCONNECT PS PUMP AND A/C COMPRESSOR
WITHOUT DISCONNECTING HOSES
(a) Disconnect the PS air hose from the No.4 timing belt cov-
er.
(b) Disconnect the PS air hose from the air intake chamber.
(c) Remove the 2 bolts and pump rear stay.
(d) Remove the 3 bolts and plate washer, and disconnect the
vane pump assembly from the engine.
(e) Loosen the nut.
(f) Using a torx socket (E10), remove the stud bolt and nut.
(g) Disconnect the PPS solenoid valve connector.
(h) Disconnect the A/C compressor connector.
(i) Remove the 2 bolts, and disconnect the compressor from
the engine.
HINT:
Put aside the vane pump and compressor, and suspend it se-
curely.
15. REMOVE PROPELLER SHAFT (See page PR±4)
16. REMOVE TRANSMISSION CONTROL ROD
Remove the 2 nuts and control rod.
17. DISCONNECT PS GEAR HOUSING
(a) Check the steering wheel at the straight±ahead position,
and place matchmarks on the sliding yoke and intermedi-
ate shaft.
(b) Remove the bolt holding the sliding yoke to the steering
intermediate shaft.
(c) Disconnect the PS pressure switch connector and wire
clamp.

A02790
A02797
A02796
A02795
A02798
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±65
1419 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Remove the 4 bolts, and disconnect the PS housing from
the front frame.
(e) Disconnect the sliding yoke from the intermediate shaft.
HINT:
Suspend the PS gear housing securely.
18. REMOVE ENGINE AND TRANSMISSION ASSEMBLY
FROM VEHICLE
(a) Install the No.1 engine hanger in the correct direction.
Part No.:
No.1 engine hanger 12281±46050
Bolt 90105±10345
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)
(b) Attach the engine chain hoist to the engine hangers.
(c) Remove the 2 hole plugs.
(d) Remove the 4 nuts holding the engine mounting insula-
tors to the front suspension crossmember.
(e) Remove the 4 bolts, 4 nuts and rear engine mounting
member.
(f) Lift the engine out of the vehicle slowly and carefully.
HINT:
Make sure the engine is clear of all wiring, hoses and cables.
(g) Place the engine and transmission assembly onto the
stand.

A02743
O±Ring
PullClamp
A09755
Case
Clamp
A02729
A02728
A02730
EM±66
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1420 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
19. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
(a) Disconnect the engine wire clamp from the dipstick guide.
(b) Remove the bolt.
(c) Pull out the dipstick guide and dipstick from the dipstick
tube.
(d) Remove the O±ring from the dipstick guide.
20. REMOVE EXHAUST MANIFOLD
(a) Remove the case clamp.
(b) Disconnect the heated oxygen sensor (bank 2 sensor 1)
connector.
(c) Remove the 8 nuts, exhaust manifold and 2 gaskets.
21. REMOVE OIL COOLER PIPES FOR A/T
(a) Remove the 3 bolts and pipe clamps.
(b) Loosen the 2 union nuts, and remove the 2 oil cooler
pipes.
22. REMOVE TORQUE CONVERTER CLUTCH BOLTS
(a) Remove the hole plug.
(b) Turn the crankshaft pulley bolt to gain access to each bolt.
(c) Hold the crankshaft pulley bolt with a wrench, and remove
the 6 bolts.
23. R E M O V E 4 B O LT S H O L D I N G N O . 1 O I L PA N TO
TRANSMISSION
24. REMOVE STARTER
(a) Disconnect the starter connector.
(b) Remove the 2 bolts, clamp bracket and starter.

A02731
Ground
Wire
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±67
1421 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
25. DISCONNECT ENGINE WIRE FROM TRANSMISSION
(a) Disconnect the VSS connector.
(b) Disconnect the PNP switch connector.
(c) Disconnect the solenoid connector.
(d) Disconnect the direct clutch speed sensor connector.
(e) Disconnect the engine wire from the 3 wire clamps.
26. REMOVE TRANSMISSION FROM ENGINE
(a) Remove the 5 bolts and ground wire.
(b) Remove the transmission together with the torque con-
verter clutch from the engine.
27. REMOVE DRIVE PLATE
Remove the 8 bolts, rear plate, drive plate and front spacer.

P10474
Rear Plate
EM0DI±05
P10482
18
4
6
2
7
3 5
A02731
Ground
Wire
A02730
EM±68
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1422 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL DRIVE PLATE
(a) Install the front spacer, drive plate and rear plate on the
crankshaft.
(b) Apply adhesive to 2 or 3 threads of the mounting bolt end.
Adhesive:
Part No. 08833±00070, THREE BOND 1324 or
equivalent
(c) Install the uniformly tighten the 8 mounting bolts, in sever-
al passes, in the sequence shown.
Torque: 83 N´m (850 kgf´cm, 61 ft´lbf)
2. INSTALL TRANSMISSION TO ENGINE
(a) Check the torque converter clutch installation.
(See page AT±39 )
(b) Attach the transmission to the engine.
(c) Install the ground wire and 5 bolts.
Torque: 72 N´m (730 kgf´cm, 53 ft´lbf)
3. CONNECT ENGINE WIRE TO TRANSMISSION
(a) Connect the VSS connector.
(b) Connect the PNP switch connector.
(c) Connect the solenoid connector.
(d) Connect the direct clutch speed sensor connector.
(e) Connect the engine wire to the 3 wire clamps.
4. INSTALL STARTER
(a) Install the starter and clamp bracket with the 2 bolts.
Torque: 37 N´m (380 kgf´cm, 27 ft´lbf)
(b) Connect the starter connector.
5. INSTALL 4 BOLTS HOLDING NO.1 OIL PAN TO
TRANSMISSION
Torque: 37 N´m (380 kgf´cm, 27 ft´lbf)
6. INSTALL TORQUE CONVERTER CLUTCH BOLTS
(a) Apply adhesive to 2 or 3 threads of the bolt end.
Adhesive:
Part No. 08833±00070, THREE BOND 1324 or
equivalent