2000 LEXUS GS400 oil pressure

EM0DC±03
A02682
A02683
A02705
A02706
P02072
EM±40
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1394 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. CLEAN TOP SURFACES OF PISTONS AND
CYLINDER BLOCK
(a) Turn the crankshaft, and bring each piston to top dead
center (TDC). Using a gasket scraper, remove all the car-
bon from the piston top surface.
(b) Using a gasket scraper, remove all the gasket material
from the top surface of the cylinder block.
(c) Using compressed air, blow carbon and oil from the bolt
holes.
CAUTION:
Protect your eyes when using high ± pressure compressed
air.
2. CLEAN CYLINDER HEAD
(a) Remove the gasket material.
Using a gasket scraper, remove all the gasket material
from the cylinder block surface.
NOTICE:
Be careful not to scratch the cylinder block contact sur-
face.
(b) Clean the combustion chambers.
Using a wire brush, remove all the carbon from the com-
bustion chambers.
NOTICE:
Be careful not to scratch the cylinder block contact sur-
face.
(c) Clean the valve guide bushings.
Using a valve guide bushing brush and solvent, clean all
the guide bushings.

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)

EM0DJ±03
A02768
N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable part

Precoated partRH Engine Mounting Bracket and Insulator Assembly
No.2 Water Bypass Pipe with Hose
 Gasket
Water Pump

Engine Coolant Drain Plug
 O±Ring
21 (210, 15)
 O±Ring O±RingKnock Sensor 1
Knock Sensor 2
GeneratorFuel Inlet Pipe
Oil Pump
 Crankshaft Front Oil Seal
Oil Filter and
Bracket AssemblyNo.1 Oil Pipe
Union Bolt
55 (550, 41) Gasket
90 (900, 66)Union Bolt

Oil Pressure Switch
 Gasket21 (210, 15)
x 9
 O±Ring
x 6
x 6x 16
 Gasket
No.1 Oil Pan
Oil Pan Baffle Plate
Oil Strainer
LH Engine Mounting Bracket
and Insulator Assembly
 Gasket
x 16
No.2 Oil Pan
x 6
Drain Plug
EM±74
± ENGINE MECHANICAL (2JZ±GE)CYLINDER BLOCK
1428 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
CYLINDER BLOCK
COMPONENTS

EM0DK±03
P02447
EM±76
± ENGINE MECHANICAL (2JZ±GE)CYLINDER BLOCK
1430 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. INSTALL ENGINE TO ENGINE STAND FOR
DISASSEMBLY
2. REMOVE GENERATOR
Remove the bolt, nut, pipe bracket and generator.
3. REMOVE TIMING BELT AND PULLEYS
(See page EM±16)
4. REMOVE NO.2 WATER BYPASS PIPE WITH HOSE
Remove the bolt, 2 nuts, No.2 water bypass pipe and gasket.
5. REMOVE WATER PUMP
Remove the 6 bolts, water pump and O±ring.
6. REMOVE CYLINDER HEAD (See page EM±33)
7. REMOVE OIL PRESSURE SWITCH AND KNOCK
SENSORS
Using SST, remove the switch and sensors.
SST 09816±30010
8. REMOVE OIL FILTER AND BRACKET ASSEMBLY
(a) Remove the union bolt and oil filter bracket.
(b) Remove the gasket from the union bolt.
(c) Remove the O±ring from the oil filter bracket.
9. REMOVE NO.1 OIL PIPE
Remove the union bolt, No.1 oil pipe and 2 gaskets.
10. REMOVE FUEL INLET PIPE
Remove the 2 bolts and fuel inlet pipe.
11. REMOVE LH ENGINE MOUNTING BRACKET AND
INSULATOR ASSEMBLY
Remove the 4 bolts and mounting bracket.
12. REMOVE RH ENGINE MOUNTING BRACKET AND
INSULATOR ASSEMBLY
Remove the 4 bolts and mounting bracket.
13. REMOVE OIL PUMP (See page LU±6)
14. REMOVE REAR OIL SEAL RETAINER
(a) Remove the 6 bolts of the retainer.
(b) Remove the oil seal retainer by prying the area between
the oil seal retainer and main bearing cap with a screw-
driver.

EM±96
± ENGINE MECHANICAL (2JZ±GE)CYLINDER BLOCK
1450 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
20. INSTALL OIL FILTER AND BRACKET ASSEMBLY
(a) Install a new O±ring to the oil filter bracket.
(b) Install a new gasket to the union bolt.
(c) Install the oil filter bracket with the union bolt.
Torque: 90 N´m (900 kgf´cm, 65 ft´lbf)
21. INSTALL OIL PRESSURE SWITCH AND KNOCK
SENSORS (See page LU±1, SF±63)
22. INSTALL CYLINDER HEAD (See page EM±52)
23. INSTALL WATER PUMP (See page CO±8)
24. INSTALL NO.2 WATER BYPASS PIPE WITH HOSE
(a) Install the water bypass pipe with the bolt and 2 nuts.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(b) Connect the water bypass hose to the hose clamp.
25. INSTALL TIMING PULLEYS AND BELT
(See page EM±23)
26. INSTALL GENERATOR
Install the generator and pipe bracket with the bolt and nut.
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)
27. REMOVE ENGINE STAND FROM ENGINE

B00319
Recommended Viscosity (SAE):
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE °F
°C±20
±29 0
±1820
±740
460
1680
27100
38 10W±30
5W±30 PREFERRED
LU05G±04
B01610
Oil PressureOil Pressure SwitchGauge
Union Bolt
P12478
Adhesive
± LUBRICATION (2JZ±GE)OIL AND FILTER
LU±1
1573 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OIL AND FILTER
INSPECTION
1. CHECK OIL QUALITY
Check the oil for deterioration, entry of water, discoloring or thin-
ning.
If oil quality is visibly poor, replace the oil.
Oil grade:
API grade SJ, Energy±Conserving or ILSAC multi-
grade engine oil. SAE 5W±30 is the best choice for
your vehicle, for good fuel economy, and good start-
ing in cold weather.
2. CHECK ENGINE OIL LEVEL
After warming up the engine and then 5 minutes after the en-
gine stop, oil level should be between the low level and full level
marks of the dipstick.
If low, check for leakage and add oil up to the full level mark.
NOTICE:
Do not fill with engine oil above the full level mark.
3. REMOVE OIL PRESSURE SWITCH, AND INSTALL OIL
PRESSURE GAUGE
(a) Disconnect the oil pressure switch connector.
(b) Using SST, remove the oil pressure switch.
SST 09816±30010
(c) Install an oil pressure gauge.
4. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
5. CHECK OIL PRESSURE
Oil pressure:
At idle49 kPa (0.5 kgf/cm2, 7 psi) or more
At 3,000 rpm324 kPa (3.3 kgf/cm2, 47 psi) or more
6. REMOVE OIL PRESSURE GAUGE AND REINSTALL
OIL PRESSURE SWITCH
(a) Remove the oil pressure gauge.
(b) Tighten the union bolt.
Torque: 90 N´m (900 kgf´cm, 66 ft´lbf)
(c) Apply adhesive to 2 or 3 threads of the oil pressure switch.
Adhesive:
Part No.08833±00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(d) Using SST, install the oil pressure switch.
SST 09816±30010
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
(e) Connect the oil pressure switch connector.
7. START ENGINE AND CHECK FOR LEAKS

MA001±07
± MAINTENANCEOUTSIDE VEHICLE
MA±1
44 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OUTSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. TIRES
(a) Check the pressure with a gauge. If necessary, adjust.
(b) Check for cuts, damage or excessive wear.
3. WHEEL NUTS
When checking the tires, check the nuts for looseness or for missing nuts. If necessary, tighten them.
4. TIRE ROTATION
Check the owner's manual supplement in which the maintenance schedule is shown.
5. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe clean. If necessary, replace.
6. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or other fluid.
(b) If you smell gasoline fumes or notice any leak, have the cause found and corrected.
7. DOORS AND ENGINE HOOD
(a) Check that all doors and the tailgate operate smoothly, and that all latches lock securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the primary latch
is released.