1991 LEXUS SC400 transmission oil

REMOVAL OF OIL PUMP
(See Components on page LU±9)
HINT: When repairing the oil pump, the oil pan and strainer
should be removed and cleaned.
1. REMOVE ENGINE WITH TRANSMISSION (See pages EM±62 to 72)
2. SEPARATE ENGINE AND TRANSMISSION (See page EM±73)
3. INSTALL ENGINE TO ENGINE STAND FOR REMOVAL
4. REMOVE TIMING BELT (See steps 2 to 10 on pages EM±24 to 26)
5. REMOVE IDLER PULLEY AND CRANKSHAFT TIMING PULLEY
(See steps 11 and 12 on page EM±26)
6. REMOVE OIL DIPSTICK AND GUIDE (a) Remove the mounting bolt.
(b) Pull out the dipstick guide together with dipstick.
(c) Remove the O±ring from the dipstick guide.
7. REMOVE OIL LEVEL SENSOR (a) Disconnect the level sensor connector.
(b) Remove the four mounting 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 14 mounting bolts and two nuts.
LU±10
±
LUBRICATION SYSTEM Oil Pump
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6. INSTALL OIL LEVEL SENSOR(a) Install a new gasket to the level sensor.
(b) Install the level sensor with the four bolts.
Torque: 5.4 N Vm (55 kgf Vcm, 48 in. Vlbf)
(c) Connect the level sensor connector.
7. INSTALL OIL DIPSTICK GUIDE AND DIPSTICK (a) Install a new O±ring on the dipstick guide.
(b) Apply soapy water on the O±ring.
(c) Push in the dipstick guide into the guide hole of the No.1
oil pan.
(d) Install the guide with the mounting bolt.
8. INSTALL CRANKSHAFT TIMING PULLEY AND IDLER PULLEY
(See steps 1 and 2 on page EM±29)
9. INSTALL TIMING BELT (See steps 3 to 14 on pages EM±29 to 33)
10. REMOVE ENGINE STAND FROM ENGINE
11. ASSEMBLE ENGINE AND TRANSMISSION (See page EM±103)
12. INSTALL ENGINE WITH TRANSMISSION (See pages EM±104 to 112)
LU±18
±
LUBRICATION SYSTEM Oil Pump
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PREPARATION
EG0AZ±0A
RECOMMENDED TOOLS
MA009±02
EQUIPMENT
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Dial indicator with magnetic base 


\
 \
Micrometer
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MirrorBrake hose
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Steel square
\
 \
Thermometer
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Torque wrench
\
 \
Vernier calipers
MA00B±02
COOLANT 
Item
 
Capacity
 
Classification 

Engine coolant (w/ Heater)10.8 liters (11.4 US qts, 9.5 lmp. qts)Ethylene±glycol base
MA00D±0E
LUBRICANT
 Item Capacity Classification 

Engine oil (Drain and refill)
w/ Oil filter change
/ Oil filt h
 

4.8 liters (5.1 US qts, 4.2 lmp. qts)
 

API grade SG or SH, Energy±Conserving II
or ILSAC multigrade, and recommended
 


g
w/o Oil filter change 


4.8 liters (5.1 US qts, 4.2 lm. qts)
4.5 liters (4.8 US qts, 4.0 lmp. qts) 


or ILSAC multigrade, and recommended
viscosity oil with SAE 5W±30 being pre-
ferred engine oil
 Brake fluid Ð SAE J1703 or FMVSS No.116 DOT3
 Automatic transmission fluid 1.9 liters (2.0 US qts, 1.7 lmp. qts) ATF TYPE T±II

Automatic transmission fluid
(Drain and refill)
1.9 liters (2.0 US qts, 1.7 lm . qts)

AT F TYPE TII
 




Differential oil 




1.35 liters (1.43 US qts, 1.19 lmp. qts) 




Hypoid gear oil API GL±5
Above±18
5C (0 5F): SAE 90
Below±18 5C (0 5F): SAE 80W±90 or 80W
±
MAINTENANCE (1UZ ± FE)MA±5
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20. INSPECT BALL JOINTS AND DUST COVERS
(a) Inspect the ball joints for excessive looseness.wJack up the front of the vehicle and support it with
stands.
w Make sure the front wheels are in a straight±ahead
position, and depress the brake pedal.
w Jack up the lower suspension arm until there is about
half a load on the front coil spring.
w Move the front wheel up and down and check that the
ball joint has no excessive play.
Maximum lower ball joint vertical play.
0.3 mm (0.012 in.)
If the play is greater than maximum, replace the ball joint.
(b) Visually check the dust covers for damage
21. C H E C K A U TO M AT I C T RANSMISSION AND
DIFFERENTIAL OIL (FLUID)
A. Inspect automatic transmission fluid
(a) Visually check the differential for fluid and leakage.
If leakage is found, check for the cause and repair.
(b) Check the fluid level with the engine idling and shift lever at ªPº.
If the level is low, add fluid.
Transmission fluid:
See item 22 (A)
B. Inspect differential oil
(a) Visually check the transmission for oil and leakage.If leakage is found, check for the cause and repair.
(b) Remove the filler plug, and feel inside the hole with your finger. Check that the oil comes to within 5 mm (0.20 in) of the
bottom edge of the filler hole.
If the level is low, add oil until it begins to run out of the filler
hole.
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MAINTENANCE (1UZ ± FE)MA±15
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Differential oil:See item 22 (B)
(c) Reinstall the filler plug securely.
22. R E P L A C E A U TO M AT I C T RANSMISSION AND
DIFFERENTIAL OIL (FLUID)
A. Replace automatic transmission fluid
(a) Remove the drain plug, and drain the fluid.
(b) Clean the drain plug.
(c) Reinstall the drain plug securely.
(d) With the engine ªOFFº, add new fluid through the dipstick
tube.
Fluid type:
ATF Type T±II or equivalent
Drain and refill capacity: 1.9 liters (2.0 US qts. 1.7 lmp. qts)
(e) Start the engine and shift the selector into all positions fromªPº through ªLº, and then shift into ªPº position.
(f) With the engine idling, check the fluid level. Add fluid up the ªCOOLº level on the dipstick.
(g) Check that the fluid level is in the ªHOTº range at the normal
operating temperature (70 ± 80
C (158 ± 176
F)) and add
as necessary.
NOTICE: Do not overfill.
B. Replace differential oil
(a) Remove the filler and drain plugs, and drain the oil.
(b) Clean the drain plug.
(c) Reinstall the drain plug securely.
(d) Add new oil until it begins to run out of the filler hole.
Differential oil: Oil grade
API GL±5
MA±16
±
MAINTENANCE (1UZ ± FE)
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19. BRAKE PEDAL
(a) Check that pedal for smooth operation.
(b) Check that the pedal has the proper reservedistance and freeplay.
(c) Check the brake booster function.
20. BRAKES At a safe place, check that the brakes do not
pull to one side when applied.
21. PARKING BRAKE
(a) Check that the pedal has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
22. A U TO M AT I C T RANSMISSION PARK
MECHANISM
(a) Check the lock release button of the selector lever for proper and smooth operation.
(b) On a safe incline, check that the vehicle is held securely with the selector lever in the ªPº
position and all brakes released.
MA00T±0A
UNDER HOOD
23. WINDSHIELD WASHER FLUIDCheck that there is sufficient fluid in the tank.
24. ENGINE COOLANT LEVEL
Check that the coolant level is between the
LEVEL lines on the see±through reservoir at
normal temperature (20 5C (68 5F)).
25. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
26. BATTERY ELECTROLYTE LEVEL
Check the indicator.
When the indicator color is blue, the condition
is satisfactory. A red color indicates that dis-
tilled water must be added, and white indicates
that charging is necessary. 27. BRAKE FLUID LEVEL
Check that the brake fluid level is near the up-
per level line on the see±through reservoir.
28. ENGINE DRIVE BELT Check drive belt for fraying, cracks, wear or oili-
ness.
29. ENGINE OIL LEVEL
Check that level on the dipstick with the engine
turned off.
30. POWER STEERING FLUID LEVEL Check the level on the dipstick.
The level should be in the ªHOTº or ªCOLDº
range depending on the fluid temperature.
31. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking and foot brake applied, shift the selector into all
positions from ªPº to ªLº, and then shift into ªPº.
(c) Turn and pull out the dipstick and wipe off the fluid with a clean rag.
Re±insert the dipstick fully and check that the
fluid level is in the ªHOTº range.
(d) Perform this check with the fluid at normal driving temperature (70 ± 80
C (158 ± 176
F)).
If the level is at the low side, add fluid.
NOTICE: Do not overfill.
HINT: Wait about 30 minutes before checking
the fluid level after extended driving at high
speeds in hot weather, driving in heavy traffic
or with a trailer.
32. EXHAUST SYSTEM Visually inspect for cracks, holes or loose sup-
ports.
If any change in the sound of the exhaust or
smell of the exhaust fumes is noticed, have the
cause located and corrected.
MA±20
±
MAINTENANCE (1UZ ± FE)
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5. REMOVE PROPELLER SHAFT
(a) Place the matchmarks on the differential companion flangeand flexible coupling.
(b) Remove the 3 bolts inserted in the differential companion
flange.
NOTICE: The bolts inserted in the propeller shaft com-
panion flange should not be removed.
(c) Separate the flexible couplings from the differential side. HINT: If the flexible coupling can not be easily separated by
hand, insert a screwdriver into the bolt hole of the flexible cou-
pling, as shown in the illustration, then pry the coupling out.
NOTICE: Do not bring the screwdriver blade in direct
contact with the flexible coupling's rubber portion.
(d) Remove the 2 center support bearing set bolts and the adjusting washers.
HINT: Some vehicles are not equipped with an adjusting
washer.
NOTICE: When removing the set bolts, support the cen-
ter support bearing by hand so that the transmission and
intermediate shaft, and propeller shaft and differential,
remain in a straight line.
(e) Pull the yoke from the transmission.
(f) Insert SST in the transmission to prevent oil leakage. SST 09325±20010 (M/T)
09325±40010 (A/T)
±
PROPELLER SHAFT PROPELLER SHAFTPR±25
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REMOVAL OF CYLINDER HEADS
(See Components on pages EM±58 and 59)
1. DISCONNECT TIMING BELT FROM CAMSHAFT TIMING PULLEYS
(See steps 1 to 28 on pages EM±35 to 42)
2. REMOVE CAMSHAFT TIMING PULLEYS AND HYDRAULIC PUMP
(See steps 29 and 31 on pages EM±42 and 43)
HINT:
w Be careful not to drop anything inside the timing belt
cover.
w Do not allow the timing belt to come into contact with oil,
water or dust.
3. DISCONNECT PS PUMP FROM LH CYLINDER HEAD (a) Disc onnect the vacuum hose from the air intake
chamber.
(b) Remove the three bolts and nut, and disconnect the PS pump.
HINT: Put aside the PS pump, and suspend it.
4. REMOVE CATALYTIC CONVERTERS (MAIN) (a) Remove the four bolts holding the pipe support bracketto the transmission.
(b) Remove the four bolts and nuts holding the catalytic converters to the front exhaust pipe. Remove the pipe
support bracket.
(c) Disconnect the front exhaust pipe from the catalytic
converter, and remove the two gaskets.
(d) Remove the three nuts, catalytic converter and gasket. Remove the two catalytic converters.
EM±60
±
ENGINE MECHANICAL Cylinder Heads
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