1991 LEXUS SC300 oil

(p) Connect the fuel return hose to the No. 2 fuel pipe andengine oil dipstick guide clamp.
(q) Connect the brake booster vacuum hose to the union.
12. INSTALL A/C COMPRESSOR (a) Install the A/C compressor with the through bolt, nut and
three bolts.
Torque: Through bolt 26 N Vm (265 kgf Vcm, 19 ft Vlbf)
Bolt and nut 52 N Vm (530 kgf Vcm, 38 ft Vlbf)
(b) Connect the A/C compressor connector.
13. INSTALL PS PUMP (a) Install the PS pump and pump rear stay with the threebolts and nut. Alternately tighten the bolts and nut.
Torque:
(A) 58 N Vm (590 kgf Vcm, 43 ft Vlbf)
(B) 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
(b) Connect the following hoses:
(1) PS air hose to No. 4 timing belt cover
(2) PS air hose to air intake chamber
14. INSTALL CHARCOAL CANISTER (a) Install the charcoal canister.
(b) Connect the vacuum hose and air hose to the charcoalcanister.
15. INSTALL RADIATOR (a) Place the radiator on the body bracket.
(b) Install the upper radiator support with the two bolts andscrew. Install the two upper radiator supports.
EM±110
±
ENGINE MECHANICAL Cylinder Block
WhereEverybodyKnowsYourName

(c) Connect the following hoses:(1) Reservior hose to radiator
(2) Upper radiator hose to water inlet
(3) Lower radiator hose to water outlet
(4) (A/T)
Two oil cooler hoses to radiator
16. INS TALL WATE R PUMP PULLE Y, FAN WITH FLUID COUPLING AND DRIVE BELT
(a) Align the matchmarks, and install the water pump pulley
and fan with fluid coupling with the four nuts.
(b) Install the drive belt by turning the drive belt tensioner clockwise.
(c) Stretch the belt tight and tighten the four nuts.
Torque: 16 N Vm (165 kgf Vcm, 12 ft Vlbf)
17. INSTALL AIR CLEANER ASSEMBLY
(a) Connect the air cleaner hose to the throttle body.
(b) Install the air cl eaner case with the three mounting bolts.
±
ENGINE MECHANICAL Cylinder BlockEM±111
WhereEverybodyKnowsYourName

(c) Install the hose clamp.
(d) Connect the following hoses:(1) PS air hose to No. 4 timing belt cover
(2) PCV hose to No. 2 cylinder head cover
(e) Connect the volume air flow meter connector.
(f) Connect the high±tension cord to the ignition coil.
18. CONNECT CONTROL CABLES TO THROTTLE BODY Connect the following cables:(1) Accelerator cables
(2) (A/T)
Throttle control cable
(3) Cruise control actuator cable
19. INSTALL BATTERY
20. FILL ENGINE WITH COOLANT (See page CO±5)
Capacity (w/Heater): M/T 8.5 liters (9.0 US qts, 7.5 lmp. qts)
A/T 8.4 liters (8.9 US qts, 7.4 lmp. qts)
21. START ENGINE AND CHECK FOR LEAKS
22. (A/T)CHECK AUTOMATIC TRANSMISSION FLUID LEVEL
(See page MA±11)
NOTICE: Do not overfill.
23. CHECK IGNITION TIMING (See page IG±14)
Ignition timing:
105 BTDC @ idle
(w/ Terminals TE1 and E1 connected)
24. INSTALL ENGINE UNDER COVER
25. INSTALL HOOD
26. PERFORM ROAD TEST Check for abnormal noise, shock, slippage, correct shift
points and smooth operation.
27. RECHECK ENGINE COOLANT AND ENGINE OIL LEVELS
EM±112
±
ENGINE MECHANICAL Cylinder Block
WhereEverybodyKnowsYourName

SERVICE DATA (Cont'd)
TORQUE SPECIFICATIONS
\
\
Part tightened  NVm kgf Vcm ft Vlbf
\
\
Camshaft bearing cap X Cylinder head  20 200 14
\
No.1 cylinder head cover X Cylinder head5.45548 in. Vlbf\
\
No.2 cylinder head cover X Cylinder head  5.4 55 48 in. Vlbf\
\
Intake air connector X Air intake chamber  21 210 15\
\
Throttle body bracket X Throttle body  21 210 15\
\
Throttle body bracket X Cylinder head  21 210 15
\
\
EGR pipe X Intake manifold  21 210 15
\
\
EGR pipe X EGR valve  64 650 47
\
\
Spark plug X Cylinder head  18 180 13
\
\
Throttle body X Intake air connector  21 210 15
\
\
Idler pulley X Oil pump  34 350 25
\
Crankshaft pulley X Crankshaft3243,300239\
\
Camshaft timing pulley X Camshaft  79 810 59\
\
Timing belt tensioner X Oil pump  26 270 20\
\
Drive belt tensioner X Cylinder head  21 210 15\
\
EGR cooler X Cylinder head  14 140 10
\


\
Engine coolant temperature sensor X Cylinder
head 


 


20 


200 


14
\


\
Engine coolant temperature sender gauge X Cylin-
der head 


 


20 


200 


14
\
\
Engine hanger X Cylinder head  39 400 29
\
Cylinder head X Cylinder block1st3435025\
\
 2nd Turn 90
5  
\
\
 3rd Turn 905  
\
\
No.4 Timing belt cover X Cylinder head  8.8 90 78 in.Vlbf\
\
Intake manifold X Cylinder head  21 210 15
\
\
Intake manifold stay X Intake manifold  39 400 29
\
\
Intake manifold stay X Cylinder head  39 400 29
\
\
No.1 fuel pipe X Intake manifold  8.8 90 78 in. Vlbf
\
\
No.2 fuel pipe X Intake manifold  8.8 90 78 in. Vlbf
\
\
Delivery pipe X Intake manifold  21 210 15
\
\
Air intake chamber X Intake manifold  21 210 15
\
Air intake chamber stay X Air intake chamber1818513\
\
Air intake chamber stay X Cylinder head  18 185 13\
\
Vacuum control valve set X Intake manifold  21 210 15\
\
No.2 vacuum pipe X Air intake chamber  21 210 15\
\
Water outlet X Cylinder head  21 210 15
\
\
Water by±pass outlet X Cylinder head  8.8 90 78 in. Vlbf
\
\
Exhaust manifold X Cylinder head  39 400 29
\
\
Exhaust manifold heat insulator X Exhaust manifold  18 185 13
EM±116±
ENGINE MECHANICAL Service Specifications
WhereEverybodyKnowsYourName

TORQUE SPECIFICATIONS (Cont'd)
 Part tightened  NVm kgf Vcm ft Vlbf
 Main bearing cap X Cylinder block 1st 44 450 33
  2nd Turn 90 5  
 Connecting rod cap X Connecting rod 1st 29 300 22
2ndTurn 905 Rear oil seal retainer X Cylinder block  5.9 60 52 in.Vlbf Oil filter bracket X Cylinder block  88 900 65 LH engine mounting bracket X Cylinder block  58 590 43 RH engine mounting bracket X Cylinder block  58 590 43
 Knock sensor X Cylinder block  44 450 33
 Oil pressure switch X Cylinder block  14 150 11
 Fuel pipe support X Cylinder block  14 145 10
 Fuel pressure pulsation damper  41 420 30
  (for SST) 35 350 25
 Generator X Cylinder block  37 380 27
Flywheel X Crankshaft (M/T)1st4950036  2nd Turn 90 5  
 Drive Plate X Crankshaft (A/T)  98 1,000 72 Starter X Transmission  39 400 29 Oil cooler pipe X Transmission (A/T)  34 350 25
 Rear engine mounting member X Body  25 260 19
 


Rear engine mounting member X Engine mounting
insulator 


 


13 


135 


10
 Intermediate shaft X Propeller shaft  74 750 54
 Propeller shaft center bearing X Body  49 500 36
No.2 front exhaust pipe X Exhaust manifold6263046 Front exhaust pipe X No.2 front exhaust pipe  43 440 
 Clutch release cylinder X Transmission (M/T)  12 120 9 Fuel inlet hose X Fuel pipe support  34 350 25 A/C compressor X Cylinder block Through bolt 26 265 19
  Bolt and nut 52 530 38
 PS pump X Cylinder block  58 590 43
 PS pump X A/C compressor  58 590 43
 PS pump X Pump rear stay  39 400 29
 Cylinder block X Pump rear stay  39 400 29
 Fluid coupling X Water water pump  16 165 12
±
ENGINE MECHANICAL Service SpecificationsEM±117
WhereEverybodyKnowsYourName

3. REMOVE VACUUM CONTROL VALVE SET(a) Disconnect the connector from the VSV.
(b) Disconnect the following hoses:(1) Vacuum hose from VSV
(2) Vacuum hose from vacuum pipe
(c) Remove the two nuts and vacuum control valve set.
4. REMOVE VACUUM TANK AND VSV Remove the screw, vacuum hose and VSV from the vacuum
tank.
5. REMOVE OIL DIPSTICK FOR ENGINE
6. DISCONNECT NO. 2 VACUUM PIPE Remove the two nuts and disconnect the vacuum pipe.
7. REMOVE EGR PIPE (a) Loosen the union nut.
(b) Remove the two bolts, EGR pipe and gasket.
8. REMOVE AIR INTAKE CHAMBER (a) Disconnect the following hoses:(1) Vacuum hose from brake booster union
(2) Air hose (from charcoal canister)
(3) Vacuum hose from vacuum pipe
(4) Vacuum sensing hose
(5) Air hose (from PS air control valve)
FI±58
±
EFI SYSTEM
Air Induction System (Acoustic Control Induction System (ACIS)
WhereEverybodyKnowsYourName

3. INSTALL NO.2 VACUUM PIPEInstall the vacuum pipe with the two nuts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
4. INSTALL OIL DIPSTICK FOR ENGINE
5. INSTALL VACUUM TANK AND VSV
(a) Install the VSV with the screw on the vacuum tank.
Torque: 8.8 N Vm (90 kgf Vcm, 78 in. Vlbf)
(b) Install the vacuum hose.
6. INSTALL VACUUM CONTROL VALVE SET (a) Install the vacuum control valve set with the two nuts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
(b) Connect the following hoses:
(1) Vacuum hose to VSV
(2) Vacuum hose to vacuum pipe
(c) Connect the connector to the VSV.
7. (A/T) INSTALL DIPSTICK GUIDE FOR TRANSMISSION
(a) Install a new O±ring on the dipstick guide.
(b) Apply soapy on the O±ring.
(c) Connect the dipstick guide end to the tube of the oil pan,
and install the dipstick guide with the bolt.
(d) Install the dipstick.
8. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
FI±62
±
EFI SYSTEM
Air Induction System (Acoustic Control Induction System (ACIS)
WhereEverybodyKnowsYourName

INSPECTION OF COLD START
INJECTOR TIME SWITCH
1. REMOVE LOWER HIGH±TENSION CORD COVER(See steps 1, 2 and 5 to 12 on pages FI±27 to 29)
2. REMOVE RH IGNITION COIL (a) Disconnect the ignition coil connector.
(b) Remove the two bolts, and disconnect the ignition coil.
(c) Disconnect the cam position sensor connector from the
ignition coil bracket, and remove the ignition coil.
3. REMOVE COLD START INJECTOR TIME SWITCH (a) Disconnect the injector time switch connector.
(b) Remove the injector time switch and gasket.
4. INSPECT COLD START INJECTOR TIME SWITCH Using an ohmmeter, measure the resistance between each
terminal.
Resistance:
STA±STJ 25±45
below 15 °C (59 °F)
65±85
above 30 °C (86 °F)
STA±Ground 25±85

If the resistance is not as specified, replace the switch.
5. REINSTALL COLD START INJECTOR TIME SWITCH (a) Install a new gasket to the injector time switch.
(b) Install the injector time switch.
Torque: 34 N Vm (350 kgf Vcm, 25 ft Vlbf)
(c) Connect the injector time switch connector.
6. REINSTALL RH IGNITION COIL (a) Install the ignition coil with the two bolts.
FI±88
EFI SYSTEM
± Electronic Control System (Cold Start Injector Time Switch)
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