Lexus SC300 / Lexus SC400. Manual — part 365
24. DISCONNECT ENGINE WIRE FROM DELIVERY PIPES,
REAR WATER BYPASS JOINT AND RH CYLINDER HEAD
(a) Remove the 4 bolts, and disconnect the engine wire
protectors from the delivery pipes.
(b) Remove
the 2 bolts, and disconnect the engine wire protector
from the water bypass joint.
(c) Remove
the 2 bolts, and disconnect the engine wire protector
from the rear side of the RH cylinder head.
(d) Disconnect the 2 engine wire connectors from the connector
bracket on the LH delivery pipe.
(e) Disconnect the 8 injector connectors.
25. REMOVE FUEL RETURN PIPE
(a) Remove the bolt holding the fuel return pipe to the rear side
of the LH cylinder head.
(b) Remove the union bolt, 2 gaskets and fuel return pipe.
26. REMOVE DELIVERY PIPES AND INJECTORS
(a) Remove the 4 nuts holding the delivery pipes to intake
manifold.
(b) Remove the connector bracket, the 2 delivery pipes and 8
injectors assembly.
NOTICE: Be careful not to drop the injectors when re-
moving the delivery pipes.
(c) Remove the 8 insulators and 4 spacers from the cylinder
head.
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1UZ–FE ENGINE
ENGINE MECHANICAL
EG–83
(d) Pull out the 8 injectors from the delivery pipes.
(e) Remove the O–ring and grommet from each injector.
27. REMOVE
INTAKE
MANIFOLD
Remove the 6 bolts, 4 nuts, intake manifold and 2 gaskets.
28. REMOVE FRONT WATER BYPASS JOINT
(a) Disconnect the following connectors:
(1) ECT sensor connector
(2) Cold start injector time switch connector
(3) ECT sender gauge connector
(b) Remove the bolt, and disconnect the engine wire protector
from the water bypass joint.
(c) Remove the 4 nuts, water bypass joint and 2 gaskets.
29. REMOVE REAR WATER BYPASS JOINT
(a) Remove
the bolt holding the water bypass pipe to the LH rear
engine hanger.
(b) Remove the 4 nuts, water bypass joint and 2 gasket.
EG–84
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1UZ–FE ENGINE
ENGINE MECHANICAL
30. REMOVE OIL DIPSTICK AND GUIDE FOR
TRANSMISSION
(a) Remove the bolt holding the oil dipstick to the LH cylinder
head.
(b) Pull out the dipstick guide together with the dipstick from the
oil pan.
(c) Remove the O–ring from the dipstick guide.
31. REMOVE OIL DIPSTICK AND GUIDE FOR ENGINE
32. REMOVE EGR PIPE
(a) Remove the 2 bolts holding the EGR pipe to the RH exhaust
pipe.
(b) Remove the EGR pipe and gasket.
33. DISCONNECT ENGINE WIRE FROM CYLINDER HEADS
(a) Remove
the 2 bolts, and disconnect the engine wire protector
from the RH cylinder head.
(b) Remove the bolt, and disconnect the ground strap from the
RH cylinder head.
(c) Remove
the 5 bolts, and disconnect the engine wire protector
from the LH cylinder head.
34. REMOVE ENGINE HANGERS
Remove the 2 bolts and engine hanger. Remove the 2 engine
hangers.
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1UZ–FE ENGINE
ENGINE MECHANICAL
EG–85
35. REMOVE CYLINDER HEAD COVERS
Remove the 8 bolts, seal washers, cylinder head cover and
gasket. Remove the 2 cylinder head covers.
36. IF NECESSARY, REMOVE SEMI–CIRCULAR PLUGS
37. REMOVE
CAMSHAFTS
NOTICE: Since the thrust clearance of the camshaft is small,
the camshaft must be kept level while it is being removed. If the
camshaft is not kept camshaft is not kept level, the portion of
the cylinder head receiving the shaft thrust may crack or be
damaged, causing the camshaft to seize or break. To avoid
this, the following steps should be carried out.
A. Remove exhaust camshaft from RH cylinder head
(a) Boring the service bolt hole of the driven sub–gear upward
by turning the hexagon wrench head portion of the exhaust
camshaft with a wrench.
(b) Secure the exhaust camshaft sub–gear to the drive gear with
a service bolt.
Recommended service bolt:
6 mm for thread diameter
1.0 mm for thread pitch
16 – 20 mm (0.63 – 0.79 in.) for bolt length
HINT: When removing the camshaft, make sure that the tor-
sional spring force of the sub–gear has been eliminated by
the above operation.
(c) Set the timing mark (1 dot mark) of the camshaft driven gear
at approx. 10
angle by turning the hexagon wrench head
portion of the exhaust camshaft with a wrench.
EG–86
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1UZ–FE ENGINE
ENGINE MECHANICAL
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