2000 LEXUS GS400 check engine

A02665
EX
IN
35 24
35 24
66
66
P02094
Upward
Cam Lobe
Notch
P12860
EX Side
IN SideSST (B)
P12294
SST (A)
P11926
SST (A) SST (B)
7
± ENGINE MECHANICAL (2JZ±GE)VALVE CLEARANCE
EM±7
1361 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Check only the valves indicated as shown. Measure the
valve clearance. (See procedure in step (a))
12. ADJUST VALVE CLEARANCE
(a) Remove the adjusting shim.

Turn the camshaft so that the cam lobe for the valve
to be adjusted faces up.

Turn the valve lifter with a screwdriver so that the
notches are perpendicular to the camshaft.

Insert SST (B) gently from the inside as shown in the
illustration.

Using SST (A), hold the camshaft as shown in the
illustration.
SST 09248±55040 (09248±05410)

Using SST (A), press down the valve lifter and place
SST (B) between the camshaft and valve lifter. Re-
move SST (A).
SST 09248±55040 (09248±05410, 09248±05420)
HINT:

Apply SST (B) at slight angle on the side marked with º7º
or º9º, at the position shown in the illustration.

± ENGINE MECHANICAL (2JZ±GE)VALVE CLEARANCE
EM±9
1363 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
15. REINSTALL SPARK PLUGS
16. REINSTALL IGNITION COILS AND HIGH±TENSION
CORD SET ASSEMBLY (See page IG±9)
17. REINSTALL NO.3 TIMING BELT COVER
(a) Install the gasket to the timing belt cover.
(b) Using a 5 mm hexagon wrench, install the timing belt cov-
er with the 4 bolts.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
(c) Install the oil filler cap.
18. REINSTALL THROTTLE BODY AND INTAKE AIR CON-
NECTOR ASSEMBLY
(a) Install a new gasket to the air intake chamber.
(b) Place the throttle body together with the intake air con-
nector on the cylinder head.
(c) Connect the vacuum hose (from actuator for ACIS) to the
No.1 vacuum pipe.
(d) Connect the 2 water bypass hoses to the throttle body.
(e) Install the 4 bolts and 2 nuts holding the intake air connec-
tor to the air intake chamber.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
(f) Install the 2 nuts holding the throttle body bracket to the
cylinder head.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(g) Connect the air assist hose to the intake air connector.
(h) Install the PCV hose to the intake air connector.
(i) Install the EVAP hose (from charcoal canister) to the VSV
for EVAP.
(j) Install the vacuum hose (from No.2 vacuum pipe) to the
No.1 vacuum pipe.
(k) Install the throttle position sensor connector.
(l) Install the accelerator pedal position sensor connector.
(m) Install the throttle control motor connector.
(n) Install the VSV connector for EVAP.
(o) Secure the engine wire with the clamp on the throttle body
bracket.
(p) Install the engine wire clamp with the clamp bracket of the
throttle body.
(q) Connect the accelerator cable to the throttle body.
19. REINSTALL INTAKE AIR RESONATOR
20. REINSTALL ENGINE COVER
Install the engine cover with the 4 nuts.
21. REFILL WITH ENGINE COOLANT
22. START ENGINE AND CHECK FOR LEAKS

A02715
SST
A02702
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±51
1405 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(f) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202±70020 (09202±00010)
(g) Using a plastic±faced hammer, lightly tap the valve stem
tip to assure proper fit.
3. INSTALL VALVE LIFTERS AND SHIMS
(a) Install the valve lifter and shim.
(b) Check that the valve lifter rotates smoothly by hand.
4. INSTALL ECT SENSOR
Torque: 19.6 N´m (200 kgf´cm, 14 ft´lbf)
5. INSTALL CAMSHAFT POSITION SENSOR
6. INSTALL ENGINE HANGER
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)
7. INSTALL WATER OUTLET WITH WATER BYPASS
HOSE
Install a new gasket and the water outlet with the bolt and 2
nuts.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)

EM0DF±04
S02567
S02651
10 mm
Bi±Hexagon
Wrench
12 8 4 2 5 9 13
14 10 1161 3 7
S02643
Front90°
Painted Mark90°
90°
90°
A02699
Knock Pin
UpUp
EM±52
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1406 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. PLACE CYLINDER HEAD ON CYLINDER BLOCK
(a) Place a new cylinder head gasket in position on the cylin-
der block.
NOTICE:
Be sure to install it correctly.
(b) Place the cylinder head in position on the cylinder head
gasket.
2. INSTALL CYLINDER HEAD BOLTS
HINT:

The cylinder head bolts are tightened in 2 progressive
steps (steps (c) and (f)).

If any of bolts break or deform, replace them.
(a) Apply a light coat of engine oil on the threads and under
the heads of the cylinder head bolts.
(b) Install the 14 plate washers to each cylinder head bolt.
(c) Using a 10 mm bi±hexagon wrench, uniformly tighten the
cylinder head bolts, in several passes, in the sequence
shown.
Torque: 35 N´m (350 kgf´cm, 26 ft´lbf)
If any of the bolts do not meet the torque specification, replace
the bolt.
(d) Mark the front of the cylinder head bolt head with paint.
(e) Retighten the cylinder head bolts 90° in the numerical or-
der shown.
(f) Retighten cylinder head bolts by an additional 90° shown.
(g) Check that the painted mark is now turned to the rear.
3. INSTALL CAMSHAFTS
(a) Apply engine oil to the thrust portion of the camshaft.
(b) Place the camshaft on the cylinder head with the cam
lobe facing up as shown.

S02644SST
B02434
B02435
120°120°
B02436
120°120°
A02727
Front Mark
EM±54
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1408 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(n) Using SST, push the 2 oil seals in as far as they can go.
SST 09316±60011 (09316±00011, 09316±00051)
(o) Rotate the camshaft with a wrench at the hexagon posi-
tion, bring the forward straight pin up.
(p) Loosen the 12 bearing cap bolts as shown, until they can
be turned by hand; retighten in several passes.
Torque: 20 N´m (200 kgf´cm, 15 ft´lbf)
(q) Turn the camshaft 1/3 of a revolution.
(r) Loosen the 8 bearing cap bolts as shown, until they can
be turned by hand; retighten in several passes.
Torque: 20 N´m (200 kgf´cm, 15 ft´lbf)
(s) Turn the camshaft a further 1/3 of a revolution.
(t) Loosen the 8 bearing cap bolts as shown, until they can
be turned by hand; retighten in several passes.
Torque: 20 N´m (200 kgf´cm, 15 ft´lbf)
4. CHECK AND ADJUST VALVE CLEARANCE
(See page EM±5)
5. INSTALL NO.4 TIMING BELT COVER
Install the timing belt cover with 4 bolts.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
6. INSTALL CAMSHAFT TIMING PULLEYS
(a) Install the exhaust camshaft timing pulley.
(1) Align the camshaft knock pin with the groove in the
pulley, and slide on the pulley.
(2) Slide the timing pulley on the camshaft, facing the
front mark forward.
(3) Hold the hexagon portion of the camshaft with a
wrench, and tighten the timing pulley bolt.
Torque: 81 N´m (810 kgf´cm, 60 ft´lbf)

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

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.

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