Lexus SC300 / Lexus SC400. Manual - part 363

EG24R–02

CYLINDER HEADS REMOVAL

(See Components for Removal and Installation)

1. 

DISCONNECT TIMING BELT FROM CAMSHAFT TIMING
PULLEYS
(See steps 1 to 29 on pages 

EG–46

 to 54)

2. 

REMOVE CAMSHAFT TIMING PULLEYS
Using SST, remove the bolt and timing pulley. Remove the 2
timing pulleys.
SST 09278–54012

3. REMOVE 

FAN 

BRACKET

Remove the 2 bolts, 2 nuts and fan bracket.

NOTICE:

•

Be careful not to drop anything inside the timing belt

cover.

•

Do not allow the belt to come into correct with oil, water

or dust.

4.  DISCONNECT POWER STEERING (PS) PUMP FROM

ENGINE

(a)  Disconnect the vacuum hose from the air intake chamber.

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ENGINE MECHANICAL

EG–75

(b)  Remove the nut and 3 bolts, and disconnect the PS pump

from the engine.

5. 

REMOVE TWC (FRONT)

(a)  Remove the 4 bolts holding the pipe support bracket to the

transmission.

(b)  Remove the 4 bolts and nuts holding the front exhaust pipe

to the TWC, and remove the pipe support bracket.

(c) Disconnect 

the front exhaust pipe from the TWC, and remove

the 2 gaskets.

(d)  Using a 14 mm deep socket wrench, remove the 3 nuts, TWC

and gasket. Remove the 2 TWC.

6. 

REMOVE THROTTLE BODY COVER

(a)  Disconnect the EVAP hose from the hose clamp.
(b)  Remove the cap nut.
(c)  Loosen the 2 bolts, and remove the hose clamp and throttle

body cover.

7.  DISCONNECT CONTROL CABLES FROM THROTTLE

BODY
Disconnect the following cables:
(1) Accelerator 

cable

(2)  Transmission throttle control cable
(3)  Cruise control actuator cable

8. 

REMOVE RH IGNITION COIL

(a)  Disconnect the ignition coil connector.
(b)  Remove the 2 bolts and ignition coil.

EG–76

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9. 

REMOVE WATER INLET AND INLET HOUSING

(a)  Disconnect the water bypass hose from the IAC valve.

(b)  Remove the 2 bolts holding the water inlet housing to water

pump.

(c)  Pull out the water inlet and inlet housing assembly.
(d)  Remove the O–ring from the water inlet housing.

10.  REMOVE TIMING BELT REAR PLATES

Remove the 2 bolts and rear plate. Remove the 2 rear plates.

11. REMOVE 

VACUUM 

PIPE

(a)  Disconnect the following hoses:

(1) California:

Vacuum hose from throttle body

(2) Except 

California:

3 vacuum hoses from throttle body

(3)  Vacuum hose from fuel pressure regulator
(4)  2 vacuum hoses from VSV for fuel pressure control
(5) Except 

California:

2 vacuum hoses from EGR vacuum modulator

(6) 2 

vacuum hoses (from VSV for EVAP) from vacuum pipe

(7)  Vacuum hose (from VSV for fuel pressure) from air in-

take chamber

(8)  Vacuum hose (from charcoal canister) from vacuum

pipe

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EG–77

(b)  Remove the 2 bolts, the vacuum pipe and hoses assembly.

12. California:

REMOVE EGR VALVE

(a)  Disconnect the EGR valve connector.
(b)  Disconnect the following hoses:

(1)  Water bypass hose from IAC valve
(2)  Water bypass hose from water bypass pipe (from rear

water by5pass joint)

(c)  Remove the 2 nuts, EGR valve and gasket.

13. Except California:

REMOVE EGR VALVE AND VACUUM MODULATOR

(a)  Disconnect the following hoses:

(1)  Water bypass hose from IAC valve
(2)  Water bypass hose from water bypass pipe (from rear

water bypass joint)

(3)  2 vacuum hoses from VSV for EGR

(b)  Disconnect the hose clamp from the PCV hose.

EG–78

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