1991 LEXUS SC300 wheel torque

(c) Install the new pad support plates.
8. INSTALL NEW PADS
(a) Apply disc brake grease to both sides of the inner anti±squeal
shim.
(b) Install the 2 anti±squeal shims on each pad.
(c) Install inner pad with the pad wear indicator plates facing downward.
(d) Install the outer pad.
NOTICE: There should be no oil or grease adhering to the fric-
tion surfaces of the pads or the disc.
(e) Install the 2 anti±squeal springs.
9. INSTALL CALIPER
(a) Draw out a small amount of brake fluid from the reservoir.
(b) P re ss in th e pisto n with wa te r pu mp plie rs or simila r
implement.
HINT: If the piston is difficult to push in, loosen the bleeder
plug and push in the piston while letting some brake fluid es-
cape.
(c) Install the caliper.
(d) Hold the sliding pin and torque the installation bolt.
Torque: 34 N Vm (350 kgf Vcm, 25 ft Vlbf)
10. INSTALL FRONT WHEEL
11. CHECK THAT FLUID LEVEL IS AT MAX LINE
CALIPER REMOVAL
BR042±0C
1. DISCONNECT FLEXIBLE HOSE
(a) Remove the union bolt and 2 gaskets from the caliper, then
disconnect the flexible hose from the caliper.
(b) Use a container to catch the brake fluid as it drains out.
±
BRAKE SYSTEM FRONT BRAKE (SC400)BR±31
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8. INSTALL NEW PADS
(a) Apply disc brake grease to both sides of the inner anti±squeal
shim.
(b) Install the 2 anti±squeal shims on each pad.
(c) Install the inner pad with the pad wear indicator plates facing
downward.
(d) Install the outer pad.
NOTICE: There should be no oil or grease adhering to the fric-
tion surfaces of the pads or the disc.
(e) Install the 2 anti±squeal springs.
9. INSTALL CALIPER
(a) Draw out a small amount of brake fluid from the reservoir.
(b) P re ss in th e pisto n with wa te r pu mp plie rs or simila r implement.
HINT: If the piston is difficult to push in, loosen the bleeder
plug and push in the piston while letting some brake fluid es-
cape.
(c) Install the caliper.
(d) Hold the sliding pin and torque the installation bolt.
Torque: 34 N Vm (350 kgf Vcm, 25 ft Vlbf)
10. INSTALL REAR WHEEL
11. CHECK THAT FLUID LEVEL IS AT MAX LINE
CALIPER REMOVAL
BR0EN±04
1. DISCONNECT FLEXIBLE HOSE
(a) Remove the union bolt and 2 gaskets from the caliper, then
disconnect the flexible hose from the caliper.
(b) Use a container to catch the brake fluid as it drains out.
2. REMOVE CALIPER
(a) Hold the sliding pin and loosen the 2 installation bolts.
(b) Remove the 2 installation bolts.
(c) Remove the caliper from the torque plate.
±
BRAKE SYSTEM REAR BRAKE (Disc Brake)BR±39
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6. INSTALL SHOE STRUT WITH SPRINGInstall the strut with the spring forward.
7. INSTALL SHOE RETURN SPRINGS Using needle±nose pliers, install the front shoe return spring
and then install the rear shoe return spring.
8. INSTALL DISC
(a) Before installing, polish the disc and shoe surfaces with sandpaper.
(b) Align the matchmarks and install the disc. HINT: If there are no matchmarks, temporarily install the disc,
then measure the disc runout and install the disc in the posi-
tion.
(See page BR±41)
9. ADJUST PARKING BRAKE SHOE CLEARANCE
(a) Temporarily install the hub nuts.
(b) Remove the hole plug.
(c) Turn the adjuster and expand the shoes until the disc locks.
(d) Return the adjuster 8 notches.
(e) Install the hole plug.
10. INSTALL REAR DISC BRAKE ASSEMBLY Install the disc brake assembly and torque the 2 mounting
bolts.
Torque: 104 N Vm (1,065 kgf Vcm, 77 ft Vlbf)
11. INSTALL REAR WHEEL
±
BRAKE SYSTEM REAR BRAKE (Parking Brake)BR±49
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TRACTION CONTROL SYSTEM (TRAC)
DESCRIPTION
BR0F3±01
The TRAC (Traction Control) system totally controls the engine torque and the braking of the driving wheels
(rear wheels). It helps avoid slippage of the driving wheels that tends to h\
appen during starting and accel-
eration and to maintain an optimal driving force according to the road surface conditions. The syst\
em elimi-
nates the need for a subtle accelerator pedal operation and improves veh\
icle stability when starting, accel-
erating or turning on slippery roads.
The TRAC system is an option.
SYSTEM PARTS LOCATION
BR0F4±01
±
BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)BR±153
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14. (M/T)INSTALL FLYWHEEL
HINT: The flywheel bolts are tightened in two progressive
steps, (b) and (d).
(a) Install the flywheel on the crankshaft.
(b) Install and uniformly tighten the eight mount bolts inseveral passes in the sequence shown.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
(c) Mark the flywheel bolt with paint.
(d) Second, retighten the flywheel bolts by an additional
90
.
(e) Check that the painted mark is now at a 90
angle to (c).
15. (A/T) INSTALL DRIVE PLATE
(a) Apply adhesive to two or three threads of the mountingbolt end.
Adhesive: Part No. 08833±00070, THREE BOND 1324 or
equivalent
(b) Install the front spacer, drive plate and rear spacer on the crankshaft.
(c) Install and uniformly tighten the eight mounting bolts in
several passes in the sequence shown.
Torque: 98 N Vm (1,000 kgf Vcm, 72 ft Vlbf)
EM±102±
ENGINE MECHANICAL Cylinder Block
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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
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SERVICE SPECIFICATIONS
SERVICE DATA
MA002±0B 








Engine 








Spark plug
Recommended spark plug
Correct electrode gap
Firing order
Valve clearance 








ND
NGK
Intake
Exhaust
\








\
PK20R11
BKR6EP11
1.1 mm (0.043 in.)
1 ± 8 ± 4 ± 3 ± 6 ± 5 ± 7 ± 2
0.15 ± 0.25 mm (0.006 ± 0.010 in.)
0.25 ± 0.35 mm (0.010 ± 0.014 in.)
 






BrakeFront and rear brakes
Pad thickness
Disc thickness
Limit
Limit (Front) (Rear)1.0 mm (0.039 in.)
30.0 mm (1.181 in.)
15.0 mm (0.591 in.)
 




Disc runout
Parking brake
Lining thickness
Drum inside diameter
()
Limit
Limit
Limit
()
0.05 mm (0.0020 in.)
1.0 mm (0.039 in.)
191 mm (7.520 in.)
 ChassisSteering linkage
Steering wheel freeplay
Limit30 mm (1.18 in.) 


gy
Ball joint
Vertical play
Limit
()
0.3 mm (0.012 in.)
MA002±0B
TORQUE SPECIFICATIONS
\
 \
Part tightened N
Vm kgf Vcm ft Vlbf
 Spark plug x Cylinder head1818013
 Front seat x Body3737527
 Front suspension crossmember x Body for nut1271,30094
  for bolt 201
,
2,050148
 Rear suspension member x Body1761,800130
 Rear suspension member rear cushion x Body3839028
±
MAINTENANCE (1UZ ± FE)MA±21
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(b) Align matchmarks on the intermediate shaft and control valve
shaft and connect them.
Torque: 35 N Vm (360 kgf Vcm, 36 ft Vlbf)
4. CONNECT PRESSURE AND RETURN TUBES
After inserting the rotation stopper in the valve housing holes,
tighten the union bolts.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
5. CENTER SPIRAL CABLE
If the steering wheel has been removed, or the steering
wheel may have moved during the operation, always perform
centering of the spiral cable.
(See page SR±11)
6. CHECK STEERING WHEEL CENTER POINT
7. BLEED POWER STEERING SYSTEM (See page SR±115)
8. CHECK TOE±IN (See page SA±5)
SR±144
±
STEERING POWER STEERING
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