LEXUS GS400 2000 Service Repair Manual

± LUBRICATION (2JZ±GE)OIL AND FILTER
LU±3
1575 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Fill with fresh engine oil.
Capacity:
Drain and refill w/ Oil filter change
w/o Oil filter change5.4 liters (5.7 US qts, 4.8 lmp. qts)
5.1 liters (5.4 US qts, 4.5 lmp. qts)
Dry fill6.5 liters (6.9 US qts, 5.7 lmp. qts)
(c) Reinstall the oil filler cap.
4. START ENGINE AND CHECK FOR OIL LEAKS
5. RECHECK ENGINE OIL LEVEL

LU05I±01
B01978
No.3 Timing Belt Cover
Oil Filler Cap
Engine Wire Clamp Crankshaft Position Sensor
Oil Pump
Oil Level Sensor Connector
Oil Dipstick and Guide  O±Ring
Gasket  Crankshaft Front Oil Seal
Timing Belt Plate
No.2 Timing Belt Cover
Timing BeltOil Level Sensor
Oil Strainer Oil Pan Baffle Plate
Timing Belt Tensioner
Engine Oil Drain PlugTiming Belt Guide Drive Belt Tensioner
No.1 Timing Belt Cover
No.2 Oil Pan
Gasket
Idler Pulley

35 (350, 26)
 O±Ring
 O±Ring
21 (210, 15)
x 9
8.0 (80, 71 in.´lbf)
x 5
 Gasketx 16
 Gasket
x 6 x 16
No.1 Oil Pan
Crankshaft Pulley
330 (3,300, 243)
27 (270, 20)
Dust Boot
Crankshaft Timing
Pulley
 Gasketx 6
N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable part

Precoated part
LU±4
± LUBRICATION (2JZ±GE)OIL PUMP
1576 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OIL PUMP
COMPONENTS

B01643
Plug
 Gasket
Compression Spring
Relief Valve
Oil Pump Body Driven RotorDrive RotorOil Pump Body Coverx 10
 Non±reusable part
± LUBRICATION (2JZ±GE)OIL PUMP
LU±5
1577 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

LU05J±01
B01989
O±Ring
Pull
P10747
Z02375
SSTSST LU±6
± LUBRICATION (2JZ±GE)OIL PUMP
1578 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
HINT:
When repairing the oil pump, the oil pan and strainer should be
removed and cleaned.
1. REMOVE ENGINE WITH TRANSMISSION
(See page EM±62)
2. SEPARATE ENGINE AND TRANSMISSION
(See page EM±62)
3. INSTALL ENGINE TO ENGINE STAND FOR
REMOVAL
4. REMOVE CRANKSHAFT POSITION SENSOR
5. REMOVE TIMING BELT, IDLER PULLEY AND CRANK-
SHAFT TIMING PULLEY (See page EM±16)
6. REMOVE OIL DIPSTICK AND GUIDE
(a) Disconnect the engine wire clamp from the dipstick guide.
(b) Remove the bolt.
(c) Pull out the dipstick guide together with the dipstick.
(d) Remove the O±ring from the dipstick guide.
7. REMOVE OIL LEVEL SENSOR
(a) Disconnect the level sensor connector.
(b) Remove the 4 bolts and level sensor.
(c) Remove the gasket from the level sensor.
NOTICE:
Be careful not to drop the oil level sensor when removing
it.
8. REMOVE NO.2 OIL PAN
(a) Remove the 16 bolts and 2 nuts.
(b) Insert the blade of SST between the No.1 and No.2 oil
pan, break the seal of the applied sealer and remove the
No.2 oil pan.
SST 09032±00100
NOTICE:
Be careful not to damage the No.2 oil pan contact surface
of the No.1 oil pan. Be careful not to damage the oil pan
flange.

S02555
P10688
Pry
P02152
± LUBRICATION (2JZ±GE)OIL PUMP
LU±7
1579 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
9. REMOVE OIL STRAINER
Remove the bolt, 2 nuts, oil strainer and gasket.
10. REMOVE OIL PAN BAFFLE PLATE
Remove the 6 bolts and baffle plate.
11. REMOVE NO.1 OIL PAN
(a) Remove the 22 bolts.
(b) Remove the No.1 oil pan by prying the portions between
the cylinder block and No.1 oil pan with a screwdriver.
NOTICE:
Be careful not to damage the contact surfaces of the cylin-
der block and No.1 oil pan.
(c) Remove the O±ring from the cylinder block.
12. REMOVE OIL PUMP
(a) Remove the 9 bolts.
(b) Using a hammer and a brass bar, remove the oil pump by
carefully tapping the oil pump body.
(c) Remove the 2 O±rings from the cylinder block.

LU05K±01
P02148
P02443
LU±8
± LUBRICATION (2JZ±GE)OIL PUMP
1580 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE RELIEF VALVE
(a) Carefully mount the pump body in a soft jaw vise.
(b) Remove the plug, gasket, compression spring and relief
valve.
NOTICE:
Be careful not to damage the pump body.
2. REMOVE DRIVE AND DRIVEN ROTORS
Remove the 10 screws, pump body cover, the drive and driven
rotors.

LU05L±01
B01644
P02186
Mark
P02294
P02157
P02156
± LUBRICATION (2JZ±GE)OIL PUMP
LU±9
1581 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT RELIEF VALVE
Coat the valve with engine oil and check that it falls smoothly
into the valve hole under its own weight.
If it doesn't, replace the relief valve. If necessary, replace the oil
pump assembly.
2. PLACE DRIVE AND DRIVEN ROTORS INTO OIL PUMP
BODY
The marks on the rotors must face up.
3. INSPECT ROTOR TIP CLEARANCE
Using a feeler gauge, measure the clearance between the drive
and driven rotors.
Standard tip clearance:
0.060 ± 0.240 mm (0.0024 ± 0.0094 in.)
Maximum tip clearance:
0.30 mm (0.0118 in.)
If the tip clearance is greater than maximum, replace the rotors
as a set.
4. INSPECT ROTOR BODY CLEARANCE
Using a feeler gauge, measure the clearance between the driv-
en rotor and pump body.
Standard body clearance:
0.100 ± 0.175 mm (0.0039 ± 0.0069 in.)
Maximum body clearance:
0.20 mm (0.0079 in.)
If the body clearance is greater than maximum, replace the ro-
tors as a set. If necessary, replace the oil pump assembly.
5. INSPECT ROTOR SIDE CLEARANCE
Using a feeler gauge and precision straight edge, measure the
clearance between the rotors and precision straight edge.
Standard side clearance:
0.030 ± 0.090 mm (0.0012 ± 0.0035 in.)
Maximum side clearance:
0.12 mm (0.0047 in.)
If the side clearance is greater than maximum, replace the ro-
tors as a set. If necessary, replace the oil pump assembly.
6. REMOVE DRIVE AND DRIVEN ROTORS

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.

MA002±06
MA±2
± MAINTENANCEINSIDE VEHICLE
45 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSIDE 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. LIGHTS
(a) Check that the headlights, stop lights, taillights, turn signal lights, and other lights are all working.
(b) Check the headlight aiming.
3. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers function properly.
4. HORN
Check that it is working.
5. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
6. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
7. WINDSHIELD DEFROSTER
Check that air comes out from the defroster outlet when operating the heater or air conditioner.
8. REAR VIEW MIRROR
Check that it is mounted securely.
9. SUN VISORS
Check that they move freely and are mounted securely.
10. STEERING WHEEL
Check that it has the specified freeplay. Be alert for changes in steering condition, such as hard steering,
excessive freeplay or strange noises.
11. SEATS
(a) Check that all front seat controls such as seat adjusters, seatback recliner, etc. operate smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the locks hold securely in any latched position.
(d) Check that the head restraints move up and down smoothly and that the locks hold securely in any
latches position.
(e) For folding±down rear seat backs, check that the latches lock securely.
12. SEAT BELTS
(a) Check that the seat belt system such as the buckles, retractors and anchors operate properly and
smoothly.
(b) Check that the belt webbing is not cut, frayed, worn or dameged.

± MAINTENANCEINSIDE VEHICLE
MA±3
46 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
13. ACCELERATOR PEDAL
Check the pedal for smooth operation and uneven pedal effort or catching.
14. BRAKE PEDAL (See page BR±9)
(a) Check the pedal for smooth operation.
(b) Check that the pedal has the proper reserve distance and freeplay.
(c) Check the brake booster function.
15. BRAKES
At a safe place, check that the brakes do not pull to one side when applied.
16. PARKING BRAKE (See page BR±11)
(a) Check that the lever has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
17. AUTOMATIC TRANSMISSION ºPARKº MECHANISM
On a safe incline, check that the vehicle is held securely with the selector lever in ºPº position and all brakes
released.