1991 LEXUS SC400 oil filter

12. Observe the following precautions to avoid damage to theparts:
(a) Do not open the cover or case of the ECU unless
absolutely necessary (If the IC terminals are touched, the
IC may be destroyed by static electricity.).
(b) To pull apart electrical connectors, pull on the connectoritself, not the wires (See page BE±2).
(c) Be careful not to drop electrical components, such as sensors or relays. It they are dropped on a hard floor,
they should be replaced and not reused.
(d) When checking continuity at the wire connector, insert the tester probe carefully to prevent terminals from
bending.
(e) To disconnect vacuum hoses, pull on the end, not the middle of the hose.
(f) When steam cleaning an engine, protect the distributor,
coil and air filter from water.
(g) Ne ve r use an imp a ct wre n ch to re mo ve or in sta ll temperature switches or temperature sensors.
(h) When using a vacuum gauge, never force the hose onto
a connector that is too large. Use a step±down adapter
instead. Once the hose has been stretched, it may leak.
13. Tag hoses before disconnecting them: (a) When disconnecting vacuum hoses, use tags to identify
how they should be reconnected.
(b) After completing a job, double check that the vacuum hoses are properly connected. A label under the hood
shows the proper layout.
14. Installation of wheels The wheel assemblies are of the uni±directional type and
must be rotated only between the front and rear as illustrated.
Wheels are marked with turning direction indicators.
When installing the wheels, check the marks carefully and
install the wheel correctly.
15. Bleeding of traction control system When repairing the brake master cylinder or TRAC system,
bleed the air out of the TRAC system (See page BR±7).
CAUTION: Since the fluid is under high pressure, it could
spray out with great force, so be careful.
IN±6
±
INTRODUCTION General Repair Instructions
WhereEverybodyKnowsYourName

TORQUE SPECIFICATIONS
Part tightenedNVmkgf Vcmft Vlbf
Engine drain plug X Cylinder block1818013
Coolant filler plug X Water inlet housing44450 33
Water pump X Cylinder block18185 13
Water inlet housing X Water pump18185 13
Water inlet X Water inlet housing18185 13
Radiator fan shroud X Radiator4.950 43 in. Vlbf
Radiator X Body12120 9
Cooling fan reservoir tank X Radiator fan shroud4.950 43 in. Vlbf
Cooling fan inlet pipe X Radiator fan shroud4.950 43 in. Vlbf
Cooling fan pressure hose X Hydraulic motor64650 47
Radiator reservoir tank X Upper radiator support4.950 43 in. Vlbf
Radiator reservoir tank X Radiator reservoir tank support4.950 43 in. Vlbf
Hydraulic pump rear housing X End plug (for spool valve)19200 14
Hydraulic pump front housing X Rear housing21210 15
Hydraulic pump pulley X Drive shaft59600 43
Solenoid valve X Hydraulic pump rear housing39400 28
Hydraulic pump suction port union X Rear housing13135 10
 Hydraulic pump X Cylinder block 12 mm head 16 160 12
  14 mm head 20 310 22
\
 \
Cooling fan pressure hose X Hydraulic pump 64 650 47
\
 \
RH No.2 timing belt cover X Cylinder block 16 160 12
\
 \
Drive belt idler pulley X Hydraulic pump 37 380 27
\
 \
A/C compressor X Hydraulic pump 49 500 36
\
 \
A/C compressor X Cylinder block 49 500 36\
 \
A/C compressor stay X Oil filter bracket 29 300 22\
 \
Hydraulic motor cover X Motor housing 28 290 21\
 
\

\
Hydraulic motor X Radiator fan shroud
 

4.9
 

50
 

43 in.
Vlbf
\
 \
Cooling fan X Hydraulic motor 15 150 11
\
 \
Cooling fan oil cooler X Body 18 180 13
\
 \
Water temperature sensor X Radiator 7.4 75 65 in. Vlbf
±
COOLIING SYSTEM Service SpecificationsCO±65
WhereEverybodyKnowsYourName

REMOVAL OF HYDRAULIC PUMP
(See Components on page CO±26)
1. REMOVE BATTERY CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ºLOCKº position and the negative (±) termi-
nal cable is disconnected from the battery.
2. REMOVE ENGINE UNDER COVER
3. DRAIN ENGINE COOLANT (See page CO±6)
4. REMOVE DRIVE BELT Loosen the drive belt tension by turning the drive belt tension-
er counterclockwise, and remove the drive belt.
HINT: The pulley bolt for the belt tensioner has a left±hand
thread.
5. DISCONNECT A/C COMPRESSOR (a) Disconnect the A/C compressor connector.
(b) Remove the nut, and disconnect the ground cable.
(c) Remove the bolt and A/C compressor stay.
(d) R e m o v e t h e t w o b o l t s , a n d d i s c onnect the A/C
compressor from the engine.
6. REMOVE LH IGNITION COIL (a) Disconnect the following connectors and cord:(1) Ignition coil connector
(2) Noise filter connector
(3) High±tension cord
±
COOLIING SYSTEM Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)CO±27
WhereEverybodyKnowsYourName

12. REMOVE SPOOL VALVE(a) Using a 10 mm hexagon wrench, remove the end plugand following parts:
(1) Spool valve
(2) Compression spring
(3) Spool sleeve
(b) Remove the O±ring from the end plug.
INSPECTION OF HYDRAULIC PUMP
1. CLEAN DISASSEMBLED PARTS Using a cleaner and compressed air, clean the disassembled
parts.
CAUTION: Thoroughly clean the oil passages of the rear
housing. Oil passage A includes a filter which should be
cleaned carefully.
2. INSPECT SPOOL VALVE (a) Coat the spool valve with PS fluid, and check that it falls
smoothly into the spool sleeve by its own weight.
(b) Check the spool valve for leakage. Close one of the holes and apply compressed air
392±490 kPa (4±5 kgf/cm2, 57±71 psi) into the opposite
side, check that air does not come out of the end hole.
If it doesn't, replace the spool valve and sleeve as a set.
3. INSPECT SPOOL COMPRESSION SPRING Using a vernier calipers, measure the free length of the com-
pression spring.
Free length: 45.8 mm (1.803 in.)
If the free length is not as specified, replace the compression
spring.
CO±34
±
COOLIING SYSTEM Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)
WhereEverybodyKnowsYourName

14. INSTALL IGNITION COIL(a) Install the ignition coil with the two bolts.
(b) Connect the following connectors and cord:(1) Ignition coil connector
(2) Noise filter connector
(3) High±tension cord
15. INSTALL A/C COMPRESSOR (a) In sta ll th e A/C co mp re sso r, co mp re sso r sta y an dground cable with the three bolts and nut.
Torque: Bolt 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
Nut 29 N Vm (300 kgf Vcm, 22 ft Vlbf)
(b) Connect the A/C compressor connector.
16. INSTALL DRIVE BELT Install the drive belt by turning the drive belt tensioner coun-
terclockwise.
HINT: The pulley bolt for the belt tensioner has a left±hand
thread.
17. CONNECT RADIATOR HOSE TO WATER INLET
±
COOLIING SYSTEM Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)CO±45
WhereEverybodyKnowsYourName

 
Crankshaft Thrust clearance STD 0.020±0.220 mm (0.0008±0.0087 in.)
   Limit 0.30 mm (0.0118 in.)
  Thrust washer thickness  2.440±2.490 mm (0.0961±0.0980 in.)
  Main journal bore diameter on cylinder block  67.026±67.033 mm (2.8388±2.6391 in.)  
(with main bearing)
  
  
Main journal oil clearance
 
STD
 
0.026±0.045 mm (0.0010±0.0018 in.)   Limit 0.055 mm (0.0022 in.)  Main journal diameter  66.988±67.000 mm (2.6373±2.6378 in.) \
 \
Main bearing center wall thickness (Reference) 
   Mark 1 2.486±2.489 mm (0.0979±0.0980 in.)   Mark 2 2.489±2.492 mm (0.0980±0.0981 in.)   Mark 3 2.492±2.495 mm (0.0981±0.0982 in.)   Mark 4 2.495±2.498 mm (0.0982±0.0983 in.)
   Mark 5 2.498±2.501 mm (0.0983±0.0985 in.)
  Crank pin diameter  51.982±52.000 mm (2.0465±2.0472 in.)
  Circle runout Limit 0.08mm (0.0031 in.)
  Main journal taper and out±of±round Limit 0.02mm (0.0008 in.)
  Crank pin taper and out±of±round Limit 0.02mm (0.0008.in)
EGOC6±0C
TORQUE SPECIFICATION
 Part tightened  NVm kgf Vcm ft Vlbf
 No.1 idler pulley x Cylinder Block  34 350 25
 No.2 idler pulley x Cylinder block3435025
 Hydraulic pump x Cylinder block for 12 mm head 16 160 12

yy
for 14 mm head3031022 Crankshaft pulley x Crankshaft  245 2,500 181 Camshaft timing pulley x Camshaft  108 1,100 80 Timing belt tensioner x Oil pump  26 270 20 Spark plug x Cylinder head  18 180 13
 Drive belt tensioner x Cylinder block  16 160 12
 Generator x Generator bracket  37 380 27
 Generator x Cylinder block3738027
 Distributor housing x Cylinder head1818513
 Distributor rotor x Camshaft timing pulley3.83934 in.
lbf
 Distributor cap x Distributor housing3.83934 in.
lbf
 RH No.2 timing belt cover x Cylinder blockfor 12 mm head1818513
Drive belt idler pulley x Fan bracket3738027 
A/C compressor x Cylinder block4950036 A/C compressor x Fan bracket  49 500 36 A/C compressor stay x Oil filter bracket  29 300 22 Upper radiator support x Body  12 120 9 Exhaust manifold x Cylinder head  44 450 33
 Cylinder head x Cylinder block 1st 39 400 29
  2nd Turn 90 5  
 Camshaft bearing cap x Cylinder head  16 160 12
 Cylinder head cover x Cylinder head  5.9 60 52 in.Vlbf
Engine hanger x Cylinder head3738027 EGR pipe x RH exhaust pipe  18 185 13 Rear water bypass joint x Cylinder head  18 185 13
±
1UZ ± FE ENGINE ENGINE MECHANICALEG±209
WhereEverybodyKnowsYourName

\
 \

Spring tester Valve spring
\
 
\

\
Steel square 

Valve spring
\
 
\

\

Thermometer 


\
 \
Torque wrench 
\
 
\

\
Valve seat cutter 


\
 
\

Vernier calipers 

EG0B1±0A
COOLANT
 Item Capacity Classification
 Engine coolant (w/ Heater) 10.8 liters (11.4 US qts, 9.5 lmp. qts) Ethylene±glycol base
EG0B1±10
LUBRICANT
 Item Capacity Classification
 Engine oil  API grade SG or SH, Energy±Conserving II
 Dry fill 6.0 liters (6.3 US qts, 5.3 lmp. qts) or ILSAC multigrade and recommended
 Drain and refill  viscosity oil with SAE 5W±30
 w/ Oil filter change 4.8 liters (5.1 US qts, 4.2 lmp. qts) being the preferred engine oil
 w/o Oil filter change 4.5 liters (4.8 US qts, 4.0 lmp. qts) 
EG0B1±0J
SSM (SERVICE SPECIAL MATERIALS)
 08826±00080 Seal packing or equivalent Camshaft bearing cap
   Cylinder head semi±circular plug
   Cylinder head cover
   Rear oil sear retainer
 08826±00080 Seal packing or equivalent Oil pump
   
   
   
 08826±00100 Seal Packing 1282B, Water inlet housing
  THREE BOND 1282B or equivalent Water seal plate
   Water pump
   
 08833±00070 Adhesive 1311, Drive plate bolt
  THREE BOND 1311 or equivalent 
   
   
 08833±00080 Adhesive 1344 No.1 idler pulley bolt
  THREE BOND 1344. 
  LOCTITE 242 or equivalent 
   
EG±8±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

EG0B4±0K
ENGINE OIL INSPECTION
1. CHECK OIL QUALITYCheck the oil for deterioration, entry of water, discoloring or
thinning.
If oil quality is visibly poor, replace the oil.
Oil grade:
API grade SG or SH, Energy±Conserving II or ILSAC
multigrade engine oil. Recommended viscosity is as
shown in the illustration, with SAE 5W±30 being the
preferred engine oil.
Drain and refill capacity: w/ Oil filter change
4.8 liters (5.1 US qts, 4.2 lmp. qts)
w/o Oil filter change
4.5 liters (4.8 US qts, 4.0 lmp. qts)
2. CHECK ENGINE OIL LEVELThe oil level should be between the ªLº and ªFº marks on the
dipstick.
If low, check for leakage and add oil up to the ªFº mark.
EG3E2±01
BATTERY INSPECTION
1. CHECK BATTERY ELECTROYTE LEVEL AND VOLTAGE
(a) Check the electrolyte quantity of each cell.If under the lower level, replace the battery (or add distilled
water if possible.). Need to check the charging system.
(b) Measure the battery voltage between the terminals negative (±) and positive (+) of the battery.
Standard voltage:
12.7±12.9 V at 20 5C (68 5F)
HINT:
w Before measuring the voltage, turn the ignition switch
OFF and turn off the electrical systems (headlight,
blower motor, rear defogger etc.) for 60 seconds to
remove the surface charge.
EG±10
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName