timing LEXUS GS400 2000 Service User Guide

A11128
Accelerator Pedal Position Sensor Connector
Throttle Control Motor Connector
Throttle Body and Intake Air Connector Assembly
Water Bypass HoseVSV Connector
for EVAP
EVAP Hose
 Gasket Air Assist Hose Engine Wire
Oil Filler Cap
No.3 Timing Belt Cover
Gasket
No.2 Timing Belt Cover
GasketThrottle
Position
Sensor
Connector
Vacuum Hose
(from Actuator for ACIS)
Water Bypass Hose
Engine Wire Protector
High±Tension
Cord w/ Clamp
No.1 Cylinder
Head Cover
Gasket
Timing Belt
x 6
Timing Belt Guide
Gasket
x 5 No.1 Timing Belt Cover
Crankshaft
Pulley
21 (210, 15)
Drive Belt Tensioner
330 (3,300, 243)
Camshaft
Timing Pulley
(VVT±i Pulley)81 (810, 60)
Straight
Screw Plug
15 (150, 11)Seal Washer
Camshaft
Timing Oil
Control Valve
Camshaft Timing
Oil Control
Valve Connector Gasket
Oil Control Valve Filter
 O±Ring
No.1 Oil PipeUnion Bolt
55 (550, 41)
Idler Pulley
Crankshaft Timing Pulley
Timing Belt Plate
Timing Belt Tensioner
N´m (kgf´cm, ft´lbf) : Specified torque
35 (350, 26)

8.0 (80, 71 in.´lbf)
27 (270, 20)
 Non±reusable part

Precoated part
Dust Boot
Engine Wire ClampPCV Hose
Vacuum Hose
(from No.2
Vacuum Pipe)
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±15
1369 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

EM0D6±04
A01482
A02663
5 mm Hexagon Wrench
A02649
A02690
SST
EM±16
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1370 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. REMOVE RADIATOR ASSEMBLY (See page CO±18)
4. REMOVE DRIVE BELT (See page CH±1)
5. REMOVE PS PUMP AND FRONT BRACKET
(a) Remove the 3 bolts, plate washer and pump front bracket.
(b) Disconnect the vane pump from the bracket.
6. REMOVE NO.3 TIMING BELT COVER
Using a 5 mm hexagon wrench, remove the 4 bolts, oil filler cap,
timing belt cover and gasket.
7. REMOVE NO.2 TIMING BELT COVER
Using a 5 mm hexagon wrench, remove the 3 bolts, timing belt
cover and gasket.
8. REMOVE DRIVE BELT TENSIONER
Remove the 3 bolts and tensioner.
NOTICE:
Be careful not to drop the bolts inside the timing belt cover.
9. LOOSEN CRANKSHAFT PULLEY BOLT
Using SST, loosen the pulley bolt.
SST 09213 ± 70010, 09330 ± 00021

A02656
A02671
Timing MarkSub Timing Mark
60°
Turn
A02660
Dot
Mark
30°Timing
MarkDot
Mark
30°Timing
Mark
A02653
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±17
1371 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
10. SET NO.1 CYLINDER TO APPROX. 60°/ BTDC COM-
PRESSION
(a) Turn the crankshaft pulley, and align its groove with timing
mark º0º of the No.1 timing belt cover.
NOTICE:
Always turn the crankshaft clockwise.
(b) Check that the timing marks (TDC mark) of the camshaft
timing pulleys are aligned with the timing marks of the
No.4 timing belt cover.
If not, turn the crankshaft 1 revolution (360°).
(c) Turn the crankshaft pulley 60° counterclockwise to place
the sub timing mark (60° mark BTDC) on the crankshaft
pulley at the timing mark º0º position of the No.1 timing
belt cover.
NOTICE:
If the timing belt is disengaged, having the crankshaft
pulley at the wrong angle can cause the piston head and
valve head to come into contact with each other when you
remove the camshaft timing pulleys (steps 11 to 17), thus
resulting damage. So, always set the crankshaft pulley at
the correct angle.
(d) Check that the dot marks (60° mark BTDC) of the cam-
shaft timing pulleys are aligned with the timing marks of
the No.4 timing belt cover.
(e) Remove the crankshaft pulley bolt.
NOTICE:
Do not turn the crankshaft pulley.
11. REMOVE TIMING BELT FROM CAMSHAFT TIMING
PULLEYS
HINT:
(Re±using timing belt):
Place matchmarks on the timing belt and camshaft timing pul-
leys as shown in the illustration.

P11002
A11127
SST
A11126
5 mm
Hexagon
Wrench
A02662
Gasket
Union Bolt
Oil Control
Valve Filter
EM±18
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1372 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(a) Alternately loosen the 2 bolts, and remove them, the ten-
sioner and dust boot.
(b) Disconnect the timing belt from the camshaft timing pul-
leys.
12. REMOVE EXHAUST CAMSHAFT TIMING PULLEY
Using SST, remove the bolt and timing pulley.
SST 09960±10010 (09962±01000, 09963±01000)
13. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
14. REMOVE THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY (See page EM±5)
15. REMOVE NO.1 CYLINDER HEAD COVER
(a) Using a 5 mm hexagon wrench, remove the bolts, and dis-
connect the engine wire protector from the No.2 cylinder
head cover.
(b) Remove the nut, and disconnect the engine wire protec-
tor from the intake manifold.
(c) Remove the 2 bolts, and disconnect the high±tension
cords with the clamp from the No.2 cylinder head.
(d) Remove the 6 bolts, 2 nuts, No.1 cylinder head cover and
gasket.
16. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE
(See page SF±43)
17. DISCONNECT NO.1 OIL PIPE
Remove the bolt, union bolt, oil control valve filter and 2 gas-
kets, and disconnect the No.1 oil pipe from the No.3 camshaft
bearing cap.

A02655
Drain Hole
Rotate
(30°)
DO NOT
REMOVE
A02650
Hold
Straight
Screw
PlugSet Bolt
Seal Washer
Hexagon Wrench
A02745
SST
Bolt
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±19
1373 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
18. REMOVE VVT±i (INTAKE CAMSHAFT TIMING)
PULLEY
NOTICE:

The 5 bolts shown in the illustration determine the
backlash of the gear in the timing pulley, so do not re-
move them.
If any of the 5 bolts are removed, install a new cam-
shaft timing pulley assembly.

When removing the straight screw plug, follow the
prescribed procedure in order to avoid spilling oil on
the timing system parts.
(a) Rotate the VVT±i pulley from left to right 2 to 3 times within
its range of movement (30°) and use a waste cloth to col-
lect the oil from the camshaft timing oil control valve instal-
lation hole.
NOTICE:
Approximately 20 cc (1.2 cu in.) of oil will be ejected, so
take care not to spill it.
(b) Holding the hexagon portion of camshaft with a wrench.
(c) Using a 14 mm hexagon wrench, remove the straight
screw plug and seal washer.
NOTICE:
Some oil may spill, so put a waster cloth below the plug
white doing the operation.
(d) Using a 10 mm hexagon wrench, and remove the set bolt
and VVT±i pulley.
(e) Remove the wrench.
19. REMOVE CRANKSHAFT PULLEY
Using SST and bolt (diameter: 8 mm, pitch: 1.5 mm), remove
the crankshaft pulley.
SST 09950±50012 (09951±05010, 09552±05010,
09553±05020, 09554±05030)
Bolt: Part No. 90119±18001
NOTICE:
Do not turn the crankshaft pulley.
20. REMOVE NO.1 TIMING BELT COVER
Remove the 5 bolts, timing belt cover and gasket.
21. REMOVE TIMING BELT GUIDE

A02642
A02719
10 mm
Hexagon
Wrench
A02746
SST
Bolt
EM±20
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1374 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
22. REMOVE TIMING BELT
HINT:
(When re±using timing belt):
Draw an arrow on the timing belt in the direction of engine revo-
lution, and place matchmarks on the timing belt and crankshaft
timing pulley.
23. REMOVE IDLER PULLEY
Using a 10 mm hexagon wrench, remove the pivot bolt, plate
washer and idler pulley.
24. REMOVE CRANKSHAFT TIMING PULLEY
(a) Remove the bolt and timing belt plate.
(b) Remove the crankshaft timing pulley.
If the pulley cannot be removed by hand, use SST and bolt (di-
ameter: 8 mm, pitch: 1.5 mm) to remove the crankshaft timing
pulley.
SST 09950±50012 (09951±05010, 09952±05010,
09953±05020, 09954±05010)
Bolt: Part No. 90119±18001
NOTICE:

Do not scratch the sensor part the crankshaft timing
pulley.

Do not turn the timing pulley.

EM0D7±03
EM0126
No!
P02283
Turn
P02075
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±21
1375 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT TIMING BELT
NOTICE:

Do not bend, twist or turn the timing belt inside out.
Do not allow the timing belt to come into contact with
oil, water or steam.

Do not utilize timing belt tension when installing or re-
moving the mount bolt of the camshaft timing pulley.
If there are any defects, as shown in the illustrations, check the
following points.
(a) Premature parting

Check for proper installation.

Check the timing cover gasket for damage and
proper installation.
(b) If the belt teeth are cracked or damaged, check to see if
either camshaft is locked.
(c) If there is noticeable wear or cracks on the belt face,
check to see if there are nicks on the side of the idler
pulley lock.
(d) If there is wear or damage on only one side of the belt,
check the belt guide and the alignment of each pulley.
(e) If there is noticeable wear on the belt teeth, check timing
cover for damage and check gasket has been installed
correctly and for foreign material on the pulley teeth.
If necessary, replace the timing belt.
2. INSPECT IDLER PULLEY
(a) Visually check the seal portion of the idler pulley for oil
leakage.
If leakage is found, replace the idler pulley.
(b) Check the turning smoothness of the idler pulley.
If necessary, replace the idler pulley.
3. INSPECT DRIVE BELT TENSIONER
Check the turning smoothness of the tensioner.
If necessary, replace the tensioner.
4. INSPECT TIMING BELT TENSIONER
(a) Visually check tensioner for oil leakage.
HINT:
If there is only the faintest trace of oil on the seal on the push
rod side, the tensioner is all right.
If leakage is found, replace tensioner.

P02103
P02175Protrusion EM±22
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1376 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Hold the tensioner with both hands and push the push rod
strongly against the floor or wall to check that it doesn't
move.
If the push rod moves, replace the tensioner.
(c) Measure the protrusion of the push rod from the housing
end.
Protrusion: 8.0 ± 8.8 mm (0.315 ± 0.346 in.)
If the protrusion is not as specified, replace the tensioner.

EM0D8±04
A02644
Inward
A02720
A0264110 mm Hexagon Wrench
Adhesive
A02658
Timing
Mark
Dot Mark
A02642
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±23
1377 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL CRANKSHAFT TIMING PULLEY
(a) Align the pulley set key with the key groove of the pulley.
(b) Slide on the timing pulley facing the flange side inward.
NOTICE:
Do not scratch the sensor part of the crankshaft timing
pulley.
(c) Install the timing belt plate with the bolt.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
2. INSTALL IDLER PULLEY
(a) Apply adhesive to 2 or 3 threads of the pivot bolt.
Adhesive:
Part No. 08833±00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b) Using a 10 mm hexagon wrench, install the plate washer
and pulley with the pivot bolt.
Torque: 35 N´m (350 kgf´cm, 26 ft´lbf)
(c) Check that the pulley bracket moves smoothly.
3. TEMPORARILY INSTALL TIMING BELT
NOTICE:
The engine should be cold.
(a) Use the crankshaft pulley bolt to turn the crankshaft, and
align the dot mark on the crankshaft timing pulley and the
timing mark on the oil pump body.
(b) Remove any oil or water on the crankshaft timing pulley
and idler pulley, and keep them clean.
(c) Install the timing belt on the crankshaft timing pulley and
idler pulley.
HINT:
When re±using timing belt:
Align the matchmarks of the crankshaft timing pulley and timing
belt, and install the belt with the arrow pointing in the direction
of engine revolution.

A02643
A02657
60°45°
15° (Set Key Groove Angle)
Timing Mark
Sub
Timing
Mark
A02648
Align
A02659
30° EM±24
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1378 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
4. INSTALL TIMING BELT GUIDE
Install the guide, facing the cup side outward.
5. INSTALL NO.1 TIMING BELT COVER
(a) Install the gasket to the timing belt cover.
(b) Install the timing belt cover with the 5 bolts.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
6. INSTALL CRANKSHAFT PULLEY
(a) Align the pulley set key with the key groove of the pulley,
and slide on the pulley.
(b) Check that the sub timing mark (60° mark BTDC) of the
crankshaft pulley is aligned with the timing mark º0º of the
No.1 timing belt cover.
HINT:
At this time, the crankshaft pulley set key groove and the timing
mark (TDC mark) of the crankshaft pulley are as shown the il-
lustration.
(c) Temporarily install the pulley bolt.
7. INSTALL VVT±i (INTAKE CAMSHAFT TIMING)
PULLEY
(a) Align the camshaft knock pin with the VVT±i pulley, and
push the VVT±i pulley by hand until you feel it touch the
bottom.
(b) Check that the outer circumference of the VVT±i pulley
easily rotates through 30°.