sensor LEXUS GS400 2000 Service Manual Online

EM0DB±01
A02703
A02715
SST
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±39
1393 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE WATER OUTLET WITH WATER BYPASS
HOSE
Remove the 2 nuts, bolt, water outlet and gasket.
2. REMOVE ENGINE HANGER
3. REMOVE CAMSHAFT POSITION SENSOR
4. REMOVE ECT SENSOR
5. REMOVE VALVE LIFTERS AND SHIMS
HINT:
Store the valve lifters and shims in correct order.
6. REMOVE VALVES
(a) Using SST, compress the valve spring and remove the 2
keepers.
SST 09202±70020 (09202±00010)
(b) Remove the spring retainer, valve spring, valve and
spring seat.
HINT:
Store the valves, valve springs, spring seats and spring retain-
ers in correct order.
(c) Using needle±nose pliers, remove the oil seal.

EM0D2±04
A11131
(d) (g)
(f)
(e) (b)
(c)
A11130
(h)(i)
(j)
(k)
A11129
(o)
(n)
(o)
± ENGINE MECHANICAL (2JZ±GE)VALVE CLEARANCE
EM±5
1359 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
VALVE CLEARANCE
ADJUSTMENT
HINT:
Inspect and adjust the valve clearance when the engine is cold.
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. DRAIN ENGINE COOLANT
3. REMOVE INTAKE AIR RESONATOR
4. REMOVE THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(a) Disconnect the accelerator cable from the throttle body.
(b) Disconnect the engine wire clamp from the clamp bracket
of the throttle body.
(c) Disconnect the engine wire from the clamp on the throttle
body bracket.
(d) Disconnect the accelerator pedal position sensor con-
nector.
(e) Disconnect the throttle control motor connector.
(f) Disconnect the throttle position sensor connector.
(g) Disconnect the air assist hose from the intake air connec-
tor.
(h) Disconnect the PCV hose from the intake air connector.
(i) Disconnect the VSV connector for EVAP.
(j) Disconnect the EVAP hose (from charcoal canister) from
the VSV for EVAP.
(k) Disconnect the vacuum hose (from No.2 vacuum pipe)
from the No.1 vacuum pipe.
(l) Remove the 2 nuts holding the throttle body bracket to the
cylinder head.
(m) Remove the 4 bolts and 2 nuts holding the intake air con-
nector to the air intake chamber.
(n) Disconnect the vacuum hose (from actuator for ACIS)
from the No.1 vacuum pipe.
(o) Disconnect the 2 water bypass hoses from the throttle
body, and remove the throttle body together with the in-
take air connector and gasket.

± 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)

A02698
Seal Packing
A11122
A11123
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±55
1409 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the VV±i (intake camshaft timing) pulley.
(See page EM±23)
7. CONNECT TIMING BELT TO CAMSHAFT TIMING
PULLEYS (See page EM±23)
8. INSTALL NO.1 AND NO.2 CYLINDER HEAD COVERS
(a) Remove the any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826±00080 or equivalent
(c) Install the gaskets to the cylinder head covers.
(d) Install the cylinder head covers with the 12 bolts and 4
nuts.
Torque: 8.5 N´m (85 kgf´cm, 75 in.´lbf)
9. INSTALL INTAKE MANIFOLD ASSEMBLY
(a) Install a new gasket and the intake manifold and delivery
pipe assembly with the 7 bolts and 2 nuts.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
(b) Pass the water bypass hose between the No.2, No.3 in-
take ports of the manifold and delivery pipe.
(c) Install the manifold stay with the 2 bolts.
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)
(d) Install the starter wire to the manifold stay.
10. INSTALL FUEL PRESSURE PULSATION DAMPER
(See page SF±27)
11. CONNECT ENGINE WIRE TO CYLINDER HEAD
(a) Install the engine wire protector with the 3 nuts.
(b) Using a 5 mm hexagon wrench, install the bolt holding the
engine wire protector to the No.2 cylinder head cover.
(c) Connect the 6 injector connectors.
HINT:
The Nos.1, 3, 5 injector connectors and dark gray, and the
Nos.2, 4, 6 injector connectors are brown.
(d) Connect the camshaft timing oil control valve connector.
(e) Connect the camshaft position sensor connector.
(f) Connect the ECT sensor connector.

A02733
Clamp Bracket
A02811
A02732
(v)(s)(t)
(u)(u)
(t)
(s) EM±56
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1410 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(g) Connect the 2 knock sensor connector.
(h) Connect the starter connector.
(i) Connect the oil pressure switch connector.
(j) Connect the oil level sensor connector.
(k) Install the clamp bracket to the intake manifold.
(l) Connect the 2 wire clamps to the No.1 oil pipe and clamp
bracket on the intake manifold.
(m) Install the 2 ground terminals to the intake manifold.
Tighten so that each calking part should face inside.
(n) Install the clamp bracket to the water pump.
(o) Connect the generator connector.
(p) Connect the crankshaft position sensor connector.
(q) Connect the heated oxygen sensor (bank 1 sensor 1)
connector.
(r) Secure the engine wire with the clamp.
(s) Install the 2 hose clamps to the cylinder head and oil filter
bracket.
(t) Install the heated oxygen sensor (bank 2 sensor 1) con-
nector and engine wire clamp to the hose clamps.
(u) Install the 2 water bypass hoses to the hose clamps on
the cylinder head and oil filter bracket.
(v) Install the ground strap to the cylinder head.
12. INSTALL SPARK PLUGS
13. INSTALL IGNITION COILS AND HIGH±TENSION
CORD SET ASSEMBLY (See page IG±9)
14. INSTALL NO.3 TIMING BELT COVER
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)

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

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)