ect LEXUS SC300 1991 Service Repair Manual

9. REMOVE LH IGNITION COIL
(a) Disconnect the following connectors and cord:(1) Ignition coil connector
(2) Noise filter connector
(3) High±tension cord
(b) Remove the 2 bolts and ignition coil.
10. REMOVE UPPER HIGH±TENSION CORD COVER
(a) Remove the 2 bolts.
(b) Disconnect the front side claw groove of the upper cord cover
from the claw of lower cord cover, and remove the upper cord
cover.
11. REMOVE RH ENGINE WIRE COVER Remove the bolt and engine wire cover.
12. REMOVE LH ENGINE WIRE COVER Remove the 2 bolts and engine wire cover.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±49
WhereEverybodyKnowsYourName

20. REMOVE DISTRIBUTOR CAPSLoosen the 3 bolts, and remove the distributor cap.
Remove the 2 distributor caps.
HINT: Arrange the distributor caps (RH side and LH side).
21. REMOVE DISTRIBUTOR ROTORS Loosen the 2 bolts, and remove the distributor rotor.
Remove the 2 distributor rotors.
HINT: Arrange the distributor rotors (RH side and LH side).
22. REMOVE DISTRIBUTOR HOUSINGS
(a) RH Distributor Housing: Disconnect the camshaft position sensor connector.
(b) Remove the 3 bolts and distributor housing. Remove the 2 distributor housings.
23. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the cap and nut, and disconnect the generator wire.
(c) Remove the bolt, and disconnect the transmission oil cooler pipe bracket from the generator.
(d) Remove the nut and generator.
24. REMOVE DRIVE BELT TENSIONER Remove the bolt, 2 nuts and belt tensioner.
EG±52
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

wWhen replacing timing belt tensioner only:
To avoid meshing of the timing pulley and timing belt,
secure one of them with string. And place matchmarks
on the timing belt and RH camshaft timing pulley.
Alternately loosen the 2 bolts, and remove them, the belt ten-
sioner and dust boot.
29. DISCONNECT TIMING BELT FROM CAMSHAFT TIMING PULLEYS
(a) Using SST, loosen the tension spring between the LH and RH
camshaft timing pulleys by slightly turning the LH camshaft
timing pulley clockwise.
SST 09278±54012
(b) Disconnect the timing belt from the camshaft timing pulleys.
30. REMOVE CAMSHAFT TIMING PULLEYS Using SST, remove the bolt and timing pulley. Remove the 2
timing pulleys.
SST 09278±54012
EG±54
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

31. REMOVE CRANKSHAFT PULLEY
(a) Using SST, remove the pulley bolt.SST 09213±70010, 09330±00021
(b) Using SST, remove the crankshaft pulley. SST 09213±31021
32. REMOVE HYDRAULIC PUMP HINT (When re±using timing belt): Before removing the hy-
draulic pump, using the crankshaft pulley bolt, turn the crank-
shaft pulley and align the installation mark of the timing belt
with the end of the hydraulic pump.
(a) Disconnect the solenoid valve connector.
(b) Remove the 2 bolts and 2 nuts.
(c) Disconnect the crankshaft position sensor wire clamp.
(d) Remove the hydraulic pump.
33. REMOVE NO.1 TIMING BELT COVER Remove the 4 bolts, timing belt cover and gasket.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±55
WhereEverybodyKnowsYourName

39. REMOVE CRANKSHAFT TIMING PULLEYUsing SST, remove the timing pulley.
SST 09213±60017 (09213±00050)
EG1KH±02
TIMING BELT COMPONENTS
INSPECTION
1. INSPECT TIMING BELT
NOTICE:
w Do not bend, twist or turn the timing belt inside out.
w Do not allow the timing belt to come into contact with oil,
water or steam.
w Do not utilize timing belt tension when installing or
removing the mounting bolt of the camshaft timing
pulley.
If there are any defects as shown in the illustration, check the
following points:
(a) Premature parting wCheck the proper installation.
w Check the timing cover gasket for damage and proper
installation.
(b) If the belt teeth are cracked or damaged, check to see if either
camshaft or water pump is locked.
(c) If there is noticeable wear or cracks on the belt face, check to see if there are nicks on the side of the idler pulley lock.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±57
WhereEverybodyKnowsYourName

(d) If there is wear or damage on only one side of the belt, checkthe belt guide and the alignment of each pulley.
(e) If there is noticeable wear on the belt teeth, check the timing cover for damage, gasket has been installed correctly, and
the foreign material on the pulley teeth. If necessary, replace
the timing belt.
2. INSPECT IDLER PULLEYS Check that the idler pulley turns smoothly.
If necessary, replace the idler pulley.
3. INSPECT TIMING BELT TENSIONER
(a) Visually check tensioner for leakage. HINT: If there is only the faintest trace of oil on the seal on the
push rod side, the tensioner is all right.
If leakage is found, replace the tensioner.
(b) Hold the tensioner with both hands, and push the push rod firmly against floor or wall to check that it doesn't move.
If push rod moves, replace the tensioner.
EG±58
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

8. INSTALL HYDRAULIC PUMP
(a) Install the hydraulic pump, solenoid valve connector clampand crankshaft position sensor wire clamp with the 2 bolts
and 2 nuts.
Torque:
16 NVm (160 kgf Vcm, 12 ft Vlbf) for 12 mm head
30 N Vm (310 kgf Vcm, 22 ft Vlbf) for 14 mm head
HINT: Each bolt length is indicated in the illustration.
Bolt length:
106 mm (4.17 in.) for A of 12 mm head
114 mm (4.49 in.) for B of 14 mm head
(b) Connect the solenoid valve connector.
9. INSTALL CRANKSHAFT PULLEY
(a) Align the pulley set key with the key groove of the crankshaft pulley.
(b) Using SST and a hammer, tap in the crankshaft pulley. SST 09223±46011
(c) Using SST, install the pulley bolt. SST 09213±70010, 09330±00021
Torque: 245 N Vm (2,500 kgf Vcm, 181 ft Vlbf)
10. INSTALL RH CAMSHAFT TIMING PULLEY
(a) Align the camshaft knock pin with the knock pin groove of the
timing pulley, and slide on the timing pulley.
(b) Slide the timing pulley on the camshaft, facing the ªRº mark forward.
(c) Using SST, install the pulley bolt. SST 09278±54012
Torque: 108 N Vm (1,100 kgf Vcm, 80 ft Vlbf)
±
1UZ±FE ENGINE ENGINE MECHANICALEG±61
WhereEverybodyKnowsYourName

11. INSTALL LH CAMSHAFT TIMING PULLEY
(a) Align the camshaft knock pin with the knock pin groove of the
timing pulley, and slide on the timing pulley.
(b) Slide the timing pulley on the camshaft, facing the ªLº mark
forward.
(c) Using SST, install the pulley bolt. SST 09278±54012
Torque: 108 N Vm (1,100 kgf Vcm, 80 ft Vlbf)
12. SET NO.1 CYLINDER TO TDC/COMPRESSION
(a) Crankshaft Pulley Position:
Turn the crankshaft pulley, and align its groove with timing
mark ª0º of the No. 1 timing belt cover.
(b) (Camshaft Timing Pulley Position) Using SST, turn the camshaft timing pulley, and align the tim-
ing marks of the camshaft timing pulley and timing belt rear
plate.
SST 09278±54012
13. CONNECT TIMING BELT TO LH CAMSHAFT TIMING PULLEY
(a) Align the installation mark on the timing belt with the the end
of the hydraulic pump.
(b) Remove any oil or water on the LH camshaft timing pulley, and keep it clean.
(c) Using SST, slightly turn the LH camshaft timing pulley
clockwise. Align the installation mark on the timing belt with
the timing mark of the camshaft timing pulley, and hang the
timing belt on the LH camshaft timing pulley.
SST 09278±54012
EG±62
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

(d) Using SST, align the timing marks of the LH camshaft timingpulley and timing belt rear plate.
SST 09278±54012
(e) C h e c k t h a t t h e t i m i n g b e l t h a s t e n s i o n b e t w e e n t h e
crankshaft timing pulley and LH camshaft timing pulley.
14. CONNECT TIMING BELT TO RH CAMSHAFT TIMING PULLEY
(a) Remove any oil or water on the RH camshaft timing pulley
and water pump pulley, and keep them clean.
(b) Using SST, slightly turn the RH camshaft timing pulley clockwise. Align the installation mark on the timing belt with
the timing mark of the camshaft timing pulley, and hang the
timing belt on the RH camshaft timing pulley.
SST 09278±54012
(c) Using SST, align the timing marks of the RH camshaft timing pulley and timing belt rear plate.
SST 09278±54012
(d) Check that the timing belt has tension between the RH camshaft timing pulley and LH camshaft timing pulley.
15. SET TIMING BELT TENSIONER
(a) Using a press, slowly press in the push rod using 981 ± 9,807
N (100 ± 1,000 kgf, 220 ± 2,205 lbf) of force.
(b) Align the holes of the push rod and housing, pass a 1.27 mm hexagon wrench through the holes to keep the setting
position of the push rod.
(c) Release the press.
(d) Install the dust boot to the belt tensioner.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±63
WhereEverybodyKnowsYourName

19. INSTALL DRIVE BELT TENSIONERInstall the belt tensioner with the bolt and 2 nuts.
Torque: 16 N Vm (160 kgf Vcm, 12 ft Vlbf)
HINT: Use bolt 106 mm (4.18 in.) in length.
20. INSTALL GENERATOR
(a) Install the generator and transmission oil cooler pipe bracket with the bolt and nut.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
(b) Connect the generator connector.
(c) Connect the generator wire with the nut and cap.
21. INSTALL RH DISTRIBUTOR HOUSING
Install the distributor housing with the 3 bolts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
HINT:
w The RH distributor housing is marked with ªRº.
w Each bolt length is indicated in the illustration.
Bolt length:
38 mm (1.50 in.) for A
96 mm (3.78 in.) for B
22. INSTALL LH DISTRIBUTOR HOUSING Install the distributor housing with the 3 bolts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
HINT:
w The LH distributor housing is marked with ªLº.
w Each bolt length is indicated in the illustration.
Bolt length:
38 mm (1.50 in.) for A
80 mm (3.15 in.) for B
23. INSTALL DISTRIBUTOR ROTORS
(a) Align the protrusion of the distributor rotor with the groove the
camshaft timing pulley.
(b) Install the distributor rotor with the 2 bolts. Install the 2 distributor rotors.
Torque: 3.8 N Vm (39 kgf Vcm, 34 in. Vlbf)
±
1UZ±FE ENGINE ENGINE MECHANICALEG±65
WhereEverybodyKnowsYourName