2000 LEXUS GS400 Service Repair Manual

A02735
A09752
A11121
Case Clamp
New Clamp
A02819
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±57
1411 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
15. INSTALL VACUUM CONTROL VALVE SET AND NO.2
VACUUM PIPE
(a) Install the vacuum control valve set and No.2 vacuum
pipe with the 3 nuts.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(b) Install the engine wire clamp to the clamp bracket of the
No.2 vacuum pipe.
(c) Connect the VSV connector for the ACIS.
16. INSTALL AIR INTAKE CHAMBER (See page SF±49)
17. INSTALL OIL DIPSTICK AND GUIDE FOR A/T
(See page EM±68)
18. INSTALL OIL DIPSTICK AND GUIDE FOR ENGINE
(See page LU±12)
19. INSTALL THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY (See page EM±5)
20. INSTALL WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE (See page CO±13)
21. INSTALL EXHAUST MANIFOLD
(a) Install 2 new gaskets to the cylinder head.
(b) Using a 14 mm deep socket wrench, install the exhaust
manifold with the 8 nuts. Uniformly tighten the nuts in sev-
eral passes.
Torque: 40 N´m (408 kgf´cm, 30 ft´lbf)
(c) Connect the 3 heated oxygen sensor connectors and
clamp.
(d) Install a new clamp and the case clamp as shown in the
illustration.
22. CONNECT FRONT EXHAUST PIPE TO EXHAUST
MANIFOLD
(a) Temporarily install the pipe support bracket to the trans-
mission with the 2 bolts.
(b) Install 2 new gaskets to front end of the front exhaust pipe,
and connect the front exhaust pipe to the exhaust man-
ifold with the 3 bolts and nuts.
Torque: 44 N´m (440 kgf´cm, 32 ft´lbf)
(c) Tighten the 2 bolts holding the pipe support bracket to the
transmission.

B01935
Wire
Grommet
Clamp
A02802
EM±58
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1412 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
Torque: 44 N´m (440 kgf´cm, 32 ft´lbf)
(d) Connect the wire grommet and sensor wire of the the
heated oxygen sensor (bank 2 sensor 2) to the hole and
clamp on the floor.
23. INSTALL PS PUMP
(a) Install the vane pump with the 2 bolts.
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
(b) Install the pump rear stay with the 2 bolts.
Torque: 39.2 N´m (400 kgf´cm, 29 ft´lbf)
(c) Connect the PS air hose to the No.4 timing belt cover.
(d) Connect the PS air hose to the air intake chamber.
24. INSTALL DRIVE BELT (See page CH±1)
25. INSTALL AIR CLEANER, MAF METER AND INTAKE
AIR RESONATOR ASSEMBLY (See page EM±68)
26. INSTALL AIR CLEANER INLET
27. CONNECT UPPER RADIATOR HOSE TO WATER OUT-
LET
28. INSTALL ENGINE COVER
Install the engine cover with the 4 nuts.
29. FILL WITH ENGINE COOLANT
30. START ENGINE AND CHECK FOR LEAKS
31. INSTALL ENGINE UNDER COVER
32. ROAD TEST
Check for abnormal noise, shock, slippage, correct shift points
and smooth operation.
33. RECHECK ENGINE COOLANT LEVEL

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.