2000 LEXUS GS400 Service Repair Manual

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

A02728
Dark Green
A09755
Case
Clamp
A02761
New O±Ring
PushClamp
A02799
A02795
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±69
1423 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Hold the crankshaft pulley bolt with a wrench, and install
the 6 bolts evenly.
Torque: 48 N´m (490 kgf´cm, 35 ft´lbf)
HINT:
First install the dark green colored bolt, install the other bolts.
(c) Install the hole plug.
7. INSTALL OIL COOLER PIPE FOR A/T
8. 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 heated oxygen sensor (bank 2 sensor 1)
connector.
(d) Install the case clamp.
9. INSTALL OIL DIPSTICK GUIDE AND DIPSTICK FOR
A/T
(a) Install a new O±ring to the dipstick guide.
(b) Push in the dipstick guide end to the dipstick tube of the
oil pan.
(c) Install the dipstick guide with the bolt.
(d) Connect the engine wire clamp to the dipstick guide.
(e) Install the dipstick.
10. INSTALL ENGINE AND TRANSMISSION ASSEMBLY
IN VEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Slowly lower the engine and transmission assembly into
the engine compartment.
(c) Insert the stud bolts of the front engine mounting brackets
into the stud bolt holes of the front suspension crossmem-
ber.
(d) Keep the engine level.
(e) Install the rear engine mounting member with the 4 bolts
and 4 nuts.
Torque:
25.5 N´m (260 kgf´cm, 19 ft´lbf) for bolts
13.5 N´m (135 kgf´cm 10 ft´lbf) for nuts
NOTICE:
Be careful of installation direction.

A02796
A02752
A02789
A02791
A02792
(2)
(4)(3)
EM±70
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1424 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(f) Install the 4 nuts holding the engine mounting brackets to
the front suspension crossmember.
Torque: 70 N´m (714 kgf´cm, 52 ft´lbf)
(g) Install the 2 hole plugs.
(h) Remove the engine chain hoist.
(i) Remove the bolt and No.1 engine hanger.
11. INSTALL PS GEAR HOUSING
(a) Align the matchmarks and connect the sliding yoke to the
steering intermediate shaft.
(b) Install the PS gear housing with the 4 bolts.
Torque: 65 N´m (660 kgf´cm, 48 ft´lbf)
(c) Install the bolt holding the sliding yoke to the steering in-
termediate shaft.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(d) Connect the PS pressure switch and wire clamp.
12. INSTALL TRANSMISSION CONTROL ROD
Install the control rod with the 2 nuts.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
If the indicator is not aligned with the correct position, carry out
the following adjustment procedures.
(1) Loosen the nut on the shift lever.
(2) Push the control shaft lever fully rearward.
(3) Return the control shaft lever 2 notches to the N
position.
(4) Set the shift lever to the N position.
(5) While holding the shift lever lightly toward the R
position side, tighten the nut.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)

A02794
A02804A BA
A02823
A02786
A02759
Ground
Cable
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±71
1425 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
13. INSTALL A/C COMPRESSOR AND PS PUMP
(a) Temporarily install the compressor with the 2 bolts.
(b) Using a torx socket (E10), install the stud bolt.
Torque: 26 N´m (265 kgf´cm, 19 ft´lbf)
(c) Tighten the nut and 2 bolts.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
(d) Connect the compressor connector.
(e) Connect the PPS solenoid valve connector.
(f) Install the vane pump assembly with the 3 bolts and plate
washer.
Torque:
57.9 N´m (590 kgf´cm, 43 ft´lbf) for A bolts
52 N´m (530 kgf´cm, 38 ft´lbf) for B bolt
(g) Install the pump rear stay with the 2 bolts.
Torque: 39.2 N´m (400 kgf´cm, 29 ft´lbf)
(h) Connect the PS air hose to the No.4 timing belt cover.
(i) Connect the PS air hose to the air intake chamber.
14. CONNECT ENGINE WIRE TO ECM BOX
(a) Install the engine wire grommet to the ECM box.
(b) Connect the 3 ECM connectors.
(c) Connect the 4 wire harness connectors.
(d) Connect the 2 junction connectors.
(e) Install the ECM cover and ECM hood.
15. CONNECT CLAMPS, WIRES, CONNECTORS, HOSES,
CABLE AND STRAP
(a) Connect the 2 engine wire clamps to the clamp brackets.
(b) Connect the DLC1.
(c) Connect the igniter connector.
(d) Connect the ground cable to the bracket on the cylinder
block.
(e) Connect the engine wire clamp to the wire clip of the gen-
erator.
(f) Connect the generator wire.

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