Lexus SC300 / Lexus SC400. Manual - part 375

(c)  Install the engine wire protector to the LH cylinder head with

the 5 bolts.

14.  INSTALL EGR PIPE

Install a new gasket and EGR pipe to the RH exhaust man-
ifold with 2 new nuts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

15.  INSTALL OIL DIPSTICK AND GUIDE FOR ENGINE
(a)  Install a new O–ring to the dipstick guide.
(b)  Apply soapy water to the O–ring.
(c)  Push in the dipstick guide end into the guide hole of the No.1

oil pan.

(d)  Install the dipstick guide with the bolt.
(e)  Install the dipstick.
16. INSTALL  OIL  DIPSTICK  AND  GUIDE  FOR

TRANSMISSION

17.  INSTALL REAR WATER BYPASS JOINT
(a)  Install 2 new gaskets and the water bypass joint with the 4

nuts. Alternately tighten the nuts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

(b)  Install the water bypass pipe to the LH rear engine hanger

with the bolt.

18.  INSTALL FRONT WATER BYPASS JOINT
(a)  Install 2 new gaskets and the water bypass joint with the 4

nuts. Alternately tighten the nuts.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

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ENGINE MECHANICAL

EG–123

(b)  Install the engine wire protector with the bolt.
(c)  Connect the following connectors:

(1)  ECT sensor connector
(2)  ECT sender gauge connector

19. INSTALL 

INTAKE 

MANIFOLD

(a)  Place 2 new gaskets on the cylinder heads with white painted

mark facing upward.

NOTICE: Align the port holes of the gasket and cylinder head.

Be careful of the installation direction.

(b)  Place the intake manifold on the cylinder heads with the

arrow mark facing forward.

NOTICE: Be careful of the installation direction.

(c)  Install and uniformly tighten the 6 bolts and 4 nuts in several

passes.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

HINT: Use bolt 30 mm (1.18 in.) in length.

20.  INSTALL INJECTORS AND DELIVERY PIPE
(a)  Install a new grommet to the injector.
(b)  Apply a light coat of gasoline to a new O–ring, and install it

to the injector.

(c)  While turning the injector clockwise and counterclockwise,

push it to the delivery pipe. Install the 8 injectors.

(d)  Position the injector connector outward.

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ENGINE MECHANICAL

(e)  Place 8 new insulators and the 4 spacers in position on the

intake manifold.

(f)  Place the 8 injectors and 2 delivery pipes assembly in

position on the intake manifold.

(g)  Temporarily install the connector bracket and 4 nuts.

(h)  Check that the injectors rotate smoothly.

HINT: If injectors do not rotate smoothly, the probable cause
is incorrect installation of O–rings. Replace the O–rings.

(i) 

Position the injector connector upward.

(j)  Tighten the 4 nuts holding the delivery pipes to the intake

manifold.

Torque: 18 N

⋅

m (185 kgf

⋅

cm, 13 ft

⋅

lbf)

21.  INSTALL FUEL RETURN PIPE
(a)  Temporarily install the fuel return pipe with the bolt, 2 new

gaskets and union bolt.

(b)  Tighten the union bolt holding the return pipe to the fuel

pressure regulator.

Torque: 35 N

⋅

m (360 kgf

⋅

cm, 26 ft

⋅

lbf)

(c)  Tighten the bolt holding the return pipe to the LH cylinder

head.

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ENGINE MECHANICAL

EG–125

22.  INSTALL ENGINE WIRE TO DELIVERY PIPES, REAR

WATER BYPASS JOINT AND RH CYLINDER HEAD

(a)  Connect the 8 injector connector.
(b)  Install the 2 engine wire connectors to the connector on the

LH delivery pipe.

(c)  Install the engine wire protector to the RH cylinder head with

the 2 bolts.

(d)  Install the engine wire protector to the rear water bypass joint

with the 2 bolts.

(e)  Install the engine wire protector to the delivery pipes with the

4 bolts.

23.  INSTALL ENGINE WIRE TO INTAKE MANIFOLD

Install the engine wire protector with the 2 bolts.

24.  TEMPORARILY INSTALL EGR PIPE TO RH CYLINDER

HEAD
Temporarily install the EGR pipe with the bolt.
HINT: Use bolt 25 mm (0.98 in.) in length.

EG–126

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ENGINE MECHANICAL