Lexus SC300 / Lexus SC400. Manual — part 364

(c) Remove the bolt, 2 nuts, the EGR valve, vacuum modulator

assembly and gasket.

14. REMOVE EGR VALVE ADAPTOR
(a) Disconnect the EGR gas temperature sensor connector.
(b) Disconnect the PCV hose from the cylinder head.

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

15. REMOVE IAC VALVE
(a) Disconnect the IAC valve connector.
(b) Disconnect the water bypass hose from the IAC valve.

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

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–79

16. REMOVE HEATER WATER VALVE FROM BODY
(a) Disconnect the VSV connector.
(b) Disconnect the bolt holding the engine wire clamp to the

water valve bracket.

(c) Remove the 2 bolts, and disconnect the water valve and

bracket assembly.

17. REMOVE THROTTLE BODY
(a) Disconnect the following connectors:

(1) Throttle position sensor connector
(2) w/

TRAC:

Sub–throttle position sensor connector

(3) w/

TRAC:

Sub–throttle actuator connector

(b) Remove the 2 bolts and 2 nuts, and disconnect the throttle

body from the air intake chamber.

(c) Disconnect the following hoses, and remove the throttle

body:
(1) PCV hose from throttle body
(2) Water bypass hose from throttle body

(d) Remove the throttle body gasket.

18. REMOVE AIR INTAKE CHAMBER
(a) Disconnect the following hoses:

(1) Brake booster vacuum hose from union on air intake

chamber

(2) Vacuum

hose (from VSV for heater water valve) from air

intake chamber

EG–80

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1UZ–FE ENGINE

ENGINE MECHANICAL

(b) Remove the bolt, stud bolt and accelerator bracket.
(c) Remove the union bolt, union and 2 gaskets.

(d) Disconnect the following connectors:

•

Cold start injector connector

•

VSV connector for fuel pressure control

•

Except California:
VSV connector for EGR

(e) Remove the union bolt and 2 gaskets, and disconnect the

cold start injector tube from the RH delivery pipe.
CAUTION:

•

Put a shop towel under the delivery pipe.

•

Slowly loosen the union bolt.

(f) Remove the 2 bolts and gasket, and disconnect the EGR

pipe from the air intake chamber.

(g) Remove the 4 bolts, 8 nut and following parts:

(1) VSV for fuel pressure
(2) Except

California:

VSV for EGR

(3) Transmission throttle cable bracket

(h) Disconnect the DLC1 from the air intake chamber.
(i)

Remove the air intake chamber and 4 gaskets.

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1UZ–FE ENGINE

ENGINE MECHANICAL

EG–81

(j)

Remove the 3 bolts, the cold start injector, tube, lead wire
assembly and gasket.

19. DISCONNECT

HEATER

WATER

HOSES

Disconnect the following hoses:
(1) Water hose from water bypass pipe
(2) Water hose from rear water bypass joint

20. DISCONNECT

FUEL INLET HOSE FROM DELIVERY PIPE

Remove the pulsation damper and 2 gaskets, and discon-
nect the fuel inlet hose from the delivery pipe.

CAUTION:

•

Put a shop towel under the delivery pipe.

•

Slowly loosen the union bolts.

21. DISCONNECT FUEL RETURN HOSE FROM FUEL

RETURN PIPE

22. DISCONNECT EGR PIPE FROM RH CYLINDER HEAD

Remove the bolt holding the EGR pipe to the RH cylinder
head, and disconnect the EGR pipe.

23. DISCONNECT ENGINE WIRE FROM INTAKE MANIFOLD

Remove the 2 bolts, and disconnect the engine wire protector
from the intake manifold.

EG–82

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ENGINE MECHANICAL