Lexus SC300 / Lexus SC400. Service 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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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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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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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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