Lexus SC300 / Lexus SC400. Service manual - part 356

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–45

EG21P–02

TIMING BELT REMOVAL

(See Components for Removal and Installation)

1. REMOVE 

BATTERY

CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the “LOCK” posi-
tion and the negative (–) terminal cable is disconnected
from the battery.

2. 

REMOVE ENGINE UNDER COVER

3. 

DRAIN ENGINE COOLANT

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 drive belt tensioner has a left–
hand thread.

5. REMOVE 

RADIATOR 

RESERVOIR 

TANK

(a)  Disconnect the coolant level sensor connector.
(b)  Disconnect the following hoses:

(1)  Reservoir hose from water inlet housing
(2)  Reservoir hose from radiator

(c)  Remove the 2 bolts and reservoir tank bracket.
(d)  Remove the bolt holding the reservoir tank to the radiator.
(e) Disconnect 

the reservoir tank from the reservoir tank bracket,

and remove the reservoir tank.

6. REMOVE 

RADIATOR 

ASSEMBLY

(a)  Disconnect the ECT sensor connector (for cooling fan).
(b)  Disconnect the ECT sensor wire clamp from the radiator fan

shroud.

EG–46

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1UZ–FE ENGINE

ENGINE MECHANICAL

(c)  Disconnect the following hoses:

(1)  2 oil cooler hoses (for cooling fan) from pipes

(2)  2 radiator hoses

(3)  2 oil cooler hoses (for transmission) from radiator
HINT: Plug the hose ends.

(4)  Suction hose from hydraulic pump
(5)  Pressure hose from hydraulic pump

(d)  Remove the 2 bolts, screw and upper radiator support.

Remove the 2 upper radiator supports.

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–47

(e)  Slightly lift the radiator, and disconnect the 2 oil cooler hoses

(for cooling fan) from the hose clamp on the radiator fan
shroud.

(f)  Remove the radiator assembly.
(g)  Remove the 2 lower radiator supports from the radiator.

7. 

DISCONNECT AIR CONDITIONING (A/C) COMPRESSOR
FROM ENGINE

(a)  Disconnect the A/C compressor connector.
(b)  Remove the nut, and disconnect the ground cable from the

A/C compressor stay.

(c)  Remove the bolt and A/C compressor stay.

(d)  Remove the 2 bolts, and disconnect the A/C compressor

from the engine.
HINT: Put aside the A/C compressor, and suspend it.

8. 

REMOVE INTAKE AIR CONNECTOR

(a)  Disconnect the following hoses:

(1)  Air hose from IAC valve
(2) Air 

hose (from air control valve on PS pump) from intake

air connector

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

cylinder head cover.

(c)  Loosen the 2 hose clamps.
(d)  Disconnect the intake air connector from the throttle body

and air cleaner hose, and remove the intake air connector.

EG–48

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1UZ–FE ENGINE

ENGINE MECHANICAL