LEXUS GS400 2000 Service Repair Manual

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°.

A02726
Seal WasherSet BoltHold
Straight
Screw
Plug
A02722
Mesh Part
Frame Part
A11126
5 mm
Hexagon
Wrench
A02661
Front MarkSST
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±25
1379 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Holding the hexagon portion of the camshaft with a
wrench.
(d) Using a 10 mm hexagon wrench, and the set bolt.
Torque: 81 N´m (810 kgf´cm, 60 ft´lbf)
(e) Using a 14 mm hexagon wrench, install the straight screw
plug with the seal washer to the set bolt.
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
(f) Align the dot mark on the camshaft timing pulley with the
timing mark of the No.4 timing belt cover.
(g) Remove the wrench.
8. CONNECT NO.1 OIL PIPE
(a) Install the union bolt to the oil control valve filter.
NOTICE:
In case of touching the filter, avoid holding the mesh part
and holding the frame part.
(b) Install the oil pipe with 2 new gasket and the union bolt to
the No.3 camshaft bearing cap.
Torque: 55 N´m (550 kgf´cm, 41 ft´lbf)
9. INSTALL CAMSHAFT TIMING OIL CONTROL VALVE
(See page SF±43)
10. INSTALL NO.1 CYLINDER HEAD COVER
(a) Install the cylinder head and gasket with the 6 bolts and
2 nuts.
Torque: 8.5 N´m (85 kgf´cm, 75 in.´lbf)
(b) Install the high±tension cords and clamps with the 2 bolts.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
(c) Using a 5 mm hexagon wrench, install the engine wire
protector with the bolt and nut.
11. INSTALL THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY (See page EM±5)
12. INSTALL ENGINE COVER
Install the engine cover with the 4 nuts.
13. INSTALL EXHAUST CAMSHAFT TIMING PULLEY
(a) Align the camshaft knock pin with the groove on the
pulley, and slide on the timing pulley.
(b) Slide the timing pulley on the camshaft, facing the front
mark forward.
(c) Using SST, install the pulley bolt.
SST 09960±10010 (09962±01000, 09963±01000)
Torque: 81 N´m (810 kgf´cm, 60 ft´lbf)

A02821
AlignSST
Turn
A02653
A02654
Z02446
1.5 mm
Hexagon
Wrench
P04459
EM±26
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
1380 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Using SST, align the dot mark on the camshaft timing tim-
ing pulley with the timing mark of the No.4 timing belt cov-
er.
SST 09960±10010 (09962±01000, 09963±01000)
14. CONNECT TIMING BELT TO CAMSHAFT TIMING
PULLEYS
HINT:
When re±using timing belt:

Check that the matchmark on the timing belt matches the
end of the No.1 timing belt cover.
If the matchmark does not align, shift the meshing of the
timing belt and crankshaft timing pulley until they align.

Align the matchmarks of the timing belt and camshaft tim-
ing pulleys.
(a) Remove any oil or water on the camshaft timing pulley,
and keep it clean.
(b) Install the timing belt, checking the tension between the
crankshaft timing pulley and intake camshaft timing
pulley.
15. SET TIMING BELT TENSIONER
(a) Using a press, slowly press in the push rod using 981 ±
9,807 N (100 ± 1,000 kgf, 220 ± 2,205 lbf) of force.
(b) Align the holes of the push rod and housing, pass a 1.5
mm hexagon wrench through the holes to keep the push
rod retracted.
(c) Release the press.
(d) Install the dust boot onto the tensioner.

P10918
A02646
A02645
Turn
A02656
A02691
SST
± ENGINE MECHANICAL (2JZ±GE)TIMING BELT
EM±27
1381 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
16. INSTALL TIMING BELT TENSIONER
(a) Temporarily install the tensioner with the 2 bolts.
(b) Alternately tighten the 2 bolts.
Torque: 27 N´m (270 kgf´cm, 20 ft´lbf)
(c) Remove the 1.5 mm hexagon wrench from the tensioner
with pliers.
17. CHECK VALVE TIMING
(a) Slowly turn the crankshaft pulley 2 revolutions from TDC
to TDC.
NOTICE:
Always turn the crankshaft clockwise.
(b) Check that each pulley aligns with the timing marks as
shown in the illustration.
If the marks do not align, remove the timing belt and reinstall it.
18. TIGHTEN CRANKSHAFT PULLEY BOLT
Using SST, install the pulley bolt.
SST 09213±70010, 09330±00021
Torque: 330 N´m (3,300 kgf´cm, 243 ft´lbf)
19. INSTALL DRIVE BELT TENSIONER
Install the tensioner with the 3 bolts.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
NOTICE:
Be careful not to drop the bolts inside the timing belt cover.