Lexus SC300 / Lexus SC400. Manual — part 637
7. DISCONNECT HIGH–TENSION CORDS FROM
DISTRIBUTOR CAPS
Disconnect the high–tension cords at the rubber boot. Do not
pull on the cord.
NOTICE: Pulling or bending the cords may damage the
conductor inside.
8. REMOVE
DISTRIBUTOR
CAPS
Loosen the three bolts, and remove the distributor cap. Re-
move the two distributor caps.
HINT: Arrange the distributor caps (RH side and LH side).
9. REMOVE
DISTRIBUTOR
ROTORS
Loosen the two bolts, and remove the distributor rotor. Re-
move the two distributor rotors.
HINT: Arrange the distributor rotors (RH side and LH side).
10. REMOVE
DISTRIBUTOR
HOUSINGS
(a) (RH Distributor Housing)
Disconnect the cam position sensor connector.
(b) Remove the three bolts and distributor housing.
Remove the two distributor housings.
11.
REMOVE CAM POSITION SENSORS FROM
DISTRIBUTOR HOUSINGS
Remove the bolt, screw and cam position sensor.
Remove the two cam position sensors.
–
IGNITION SYSTEM
Distributor
IG–25
INSTALLATION OF DISTRIBUTOR
(See Components on page
)
1. INSTALL CAM POSITION SENSORS TO DISTRIBUTOR
HOUSINGS
Install the cam position sensor with the bolt and screw. Install
the two cam position sensors.
Torque: 6.4 N
⋅
m (65 kgf
⋅
cm, 56 in.
⋅
lbf)
HINT:
•
The RH distributor housing is marked with ”R”.
•
The LH distributor housing is marked with ”L”.
2.
INSTALL RH DISTRIBUTOR HOUSING
(a) Install the distributor housing with the three bolts.
Torque: 18 N
⋅
m (185 kgf
⋅
cm, 13 ft
⋅
lbf)
HINT:
•
The RH distributor housing is marked with ”R”.
•
Each bolt length is indicated in the illustration.
Bolt length: A 38 mm (1.50 in.)
B 96 mm (3.78 in.)
(b) Connect the cam position sensor connector.
3.
INSTALL LH DISTRIBUTOR HOUSING
(a) Install the distributor housing with the three bolts.
Torque: 18 N
⋅
m (185 kgf
⋅
cm, 13 ft
⋅
lbf)
HINT:
•
The LH distributor housing is marked with ”L”.
•
Each bolt length is indicated in the illustration.
Bolt length: A 38 mm (1.50 in.)
B 80 mm (3.15 in.)
4. INSTALL
DISTRIBUTOR
ROTORS
(a) Align the protrusion of the distributor rotor with the
groove of the camshaft timing pulley.
(b) Install the distributor rotor with the two bolts. Install the
two distributor rotors.
Torque: 3.8 N
⋅
m (39 kgf
⋅
cm, 34 in.
⋅
lbf)
IG–26
–
IGNITION SYSTEM
Distributor
5. INSTALL
DISTRIBUTOR
CAPS
Install the distributor cap with the three bolts. Install the two
distributor caps.
Torque: 3.8 N
⋅
m (39 kgf
⋅
cm, 34 in.
⋅
lbf)
6. CONNECT HIGH–TENSION CORDS TO DISTRIBUTOR
CAPS
Connect the ten high–tension cords.
NOTICE: Connect the high–tension cord by pressing on
the correct place as shown in the illustration.
If not done this way, the high–tension cord will interfere with
the camshaft timing pulley.
7.
INSTALL RH NO.2 TIMING BELT COVER
(a) Install the four gaskets to the timing belt cover.
(b) Install the connector grommet to the timing belt cover.
(c) Install the timing belt cover with the five bolts.
Torque: 16 N
⋅
m (160 kgf
⋅
cm, 12 ft
⋅
lbf)
HINT (12 mm head bolt): Use bolts 106 mm (4.17 in.) in
length.
(d) Install the wire clamp to the timing belt cover.
(e) Install
the
cam position sensor wire to the wire clamp on
the timing belt cover.
(f)
Install the cam position sensor connector to the ignition
coil bracket.
8.
INSTALL LH NO.2 TIMING BELT COVER
(a) Install the two gaskets to the timing belt cover.
(b) Run the cam position sensor wire through the timing belt
cover hole.
(c) Install the timing belt cover and connector bracket with
the three bolts.
(d) Connect the cam position sensor connector.
(e) Install the cam position sensor connector to the
connector bracket.
(f) Install
the
cam position sensor wire to the wire clamp on
the timing belt cover.
(g) Install the connector grommet to the timing belt cover.
–
IGNITION SYSTEM
Distributor
IG–27
9.
INSTALL DRIVE BELT IDLER PULLEY
Install the idler pulley and cover plate with the pulley bolt.
Torque: 37 N
⋅
m (380 kgf
⋅
cm, 27 ft
⋅
lbf)
10. INSTALL NO.3 TIMING BELT COVERS
(See steps 5 to 9 and 11 on pages
to 19)
11. CONNECT RADIATOR HOSE TO WATER INLET
12. CONNECT CABLE TO NEGATIVE TERMINAL OF
BATTERY
13. FILL ENGINE WITH COOLANT (See page
14. WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.
15. CONNECT
TACHOMETER
Connect the tester probe of a tachometer to terminal IG
of
the check (”DIAGNOSIS”) connector.
HINT: Set the tachometer to the 4–cylinder range.
NOTICE:
•
Never allow the tachometer tester probe to touch ground
as it could result in damage to the igniter and/or ignition
coil.
•
As some tachometers are not compatible with this
ignition system, we recommend that you confirm the
compatibility of your unit before use.
16. CHECK IGNITION TIMING
(a) Using SST, connect terminals TE1 and E1 of the check
(”DIAGNOSIS”) connector.
SST 09843–18020
(b) Connect the tester probe of a timing light to the
high–tension cord for No.6 cylinder.
IG–28
–
IGNITION SYSTEM
Distributor
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