Lexus SC300 / Lexus SC400. Service 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
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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1UZ–FE ENGINE
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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1UZ–FE ENGINE
ENGINE MECHANICAL
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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1UZ–FE ENGINE
ENGINE MECHANICAL
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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1UZ–FE ENGINE
ENGINE MECHANICAL
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