Lexus SC300 / Lexus SC400. Manual — part 553
INSPECTION AND ADJUSTMENT OF
VALVE CLEARANCE
HINT: Inspect and adjust the valve clearance when the
engine is cold.
1.
DISCONNECT CABLE FROM NEGATIVE TERMINAL OF
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.
DRAIN ENGINE COOLANT (See page
3.
REMOVE THROTTLE BODY COVER
(a) Remove the mounting cap nut.
(b) Loosen the two bolts, and remove the throttle body
cover.
4. DISCONNECT CONTROL CABLES FROM THROTTLE
BODY
Disconnect the following cables:
(1)
Accelerator cable
(2)
A/T throttle control cable
(3)
(w/ Cruise Control System)
Cruise control actuator cable
5.
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.
–
ENGINE MECHANICAL
Engine Tune–Up
EM–11
6.
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.
7.
REMOVE RH ENGINE WIRE COVER
Remove the bolt and engine wire cover.
8.
REMOVE LH ENGINE WIRE COVER
Remove the two bolts and engine wire cover.
9.
REMOVE VSV FOR EVAP SYSTEM
Remove the two bolts, and disconnect the VSV from cylinder
head and timing belt cover.
10. REMOVE RH NO.3 TIMING BELT COVER
Remove the three bolts and timing belt cover.
EM–12
–
ENGINE MECHANICAL
Engine Tune–Up
11. DISCONNECT FUEL INLET HOSE FROM LH DELIVERY
PIPE
Remove the pulsation damper and two gaskets, and discon-
nect the inlet hose.
12. DISCONNECT FUEL RETURN HOSE FROM FUEL
RETURN PIPE
13. DISCONNECT PCV HOSE FROM LH CYLINDER HEAD
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.
15. DISCONNECT HEATER WATER VALVE FROM BODY
(a) Disconnect the VSV connector.
(b) Remove the bolt holding the engine wire clamp to the
water valve bracket.
(c) Remove the two bolts, and disconnect the water valve
and bracket assembly.
16. 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) Disconnect the following hoses:
(1)
Water by–pass hose from ISC valve
(2)
(USA Spec.)
Vacuum hose from throttle body
(3)
(Exc. USA Spec.)
Three vacuum hoses from throttle body
–
ENGINE MECHANICAL
Engine Tune–Up
EM–13
(c) Remove the two bolts and two nuts, disconnect the
throttle body from the air intake chamber.
(d) Disconnect the following hoses, and remove the throttle
body:
(1)
PCV hose from throttle body
(2)
Water by–pass hose from throttle body
(e) Remove the throttle body gasket.
17. REMOVE RH CYLINDER HEAD COVER
(a) Remove the two bolts holding the cord clamp to the
cylinder head.
(b) Disconnect the high–tension cords from the spark
plugs.
(c) Disconnect
the
high–tension
cords
from
the
front
high–tension cord clamp.
(d) Remove the eight bolts, seal washers, cylinder head
cover and gasket.
EM–14
–
ENGINE MECHANICAL
Engine Tune–Up
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст