Lexus SC300 / Lexus SC400. Service manual — part 559

REMOVAL OF TIMING BELT

(See Components on pages

EM–33

and 34)

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 ”LOCK” 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. REMOVE

RESERVOIR

TANK

RADIATOR

(See steps 12 and 13 on pages

EM–120

and 121)

6. REMOVE

A/C

COMPRESSOR

WITHOUT

DISCONNECTING HOSES
(a) Disconnect the compressor connector.
(b) Remove the mounting nut, and disconnect the ground

cable.

(c) Remove the mounting bolt and compressor stay.

(d) Remove the two bolts, and disconnect the A/C

compressor from the engine.

HINT: Put aside the compressor, and suspend it.

–

ENGINE MECHANICAL

Timing Belt

EM–35

7.

REMOVE INTAKE AIR CONNECTOR
(a) Disconnect the following hoses:

(1)

Air hose from ISC valve

(2)

Air hose (from PS air control valve) from intake air
connector

(b) Remove the bolt holding the intake air connector to the

cylinder head cover.

(c) Loosen the two hose clamps.
(d) Disconnect the intake air connector from the throttle

body and air cleaner hose, and remove the throttle body.

8.

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 two bolts and ignition coil.

9.

REMOVE UPPER HIGH–TENSION CORD COVER
(a) Remove the two mounting bolts.
(b) Disconnect the front side claw groove of the cord cover

from the claw of the lower cover, and remove the cord
cover.

EM–36

–

ENGINE MECHANICAL

Timing Belt

10. REMOVE RH ENGINE WIRE COVER

Remove the bolt and engine wire cover.

11. REMOVE LH ENGINE WIRE COVER

Remove the two bolts and engine wire cover.

12. REMOVE VSV FOR EVAP SYSTEM

Remove the two bolts, and disconnect the VSV from cylinder
head and timing belt cover.

13. REMOVE NO.3 TIMING BELT COVER

Remove the three bolts and timing belt cover.

14. REMOVE LH NO.3 TIMING BELT COVER

(a) Remove the four mounting bolts.
(b) Disconnect

the cord grommet from the timing belt cover,

and remove the timing belt cover.

(c) Remove the cord grommet from the high–tension cord.

–

ENGINE MECHANICAL

Timing Belt

EM–37

15. REMOVE HIGH–TENSION CORDS, HIGH–TENSION

CORD CLAMPS AND LOWER HIGH–TENSION CORD
COVER ASSEMBLY
(a) Remove the two bolts holding the RH rear high–tension

cord clamp to the cylinder head.

(b) Disconnect the high–tension cords from the RH spark

plugs and distributor cap.

(c) Remove the two bolts holding the LH rear high–tension

cord clamp to the cylinder head.

(d) Disconnect the high–tension cords from the LH spark

plugs, distributor cap and LH ignition coil.

(e) Remove the bolt holding the lower high–tension cord

cover to the water inlet housing.

(f) Disconnect the high–tension cord from the RH ignition

coil, and remove the high–tension cords, clamps and
cover assembly.

16. REMOVE DRIVE BELT IDLER PULLEY

Remove the pulley bolt, cover plate and idler pulley.

17. REMOVE RH NO.2 TIMING BELT COVER

(a) Disconnect the cam position sensor connector from the

ignition coil bracket.

EM–38

–

ENGINE MECHANICAL

Timing Belt