Lexus SC300 / Lexus SC400. Service manual — part 707

(c) Using SST, install the pulley with the nut. Tighten the nut

by turning it counterclockwise.

SST 09278–54012

Torque: 59 N

⋅

m (600 kgf

⋅

cm, 43 ft

⋅

lbf)

12. INSTALL SOLENOID VALVE

(a) Install a new O–ring to the solenoid valve.
(b) Install a new O–ring to the rear housing groove.
(c) Apply fluid to the two O–rings.

(d) Install the solenoid valve.

Torque: 39 N

⋅

m (400 kgf

⋅

cm, 28 ft

⋅

lbf)

13. INSTALL WIRE CLAMP

(a) Install the wire clamp to the read wire.
(b) Install the wire clamp to the rear housing.

14. INSTALL SUCTION PORT UNION

(a) Install the O–ring to the port union.
(b) Apply fluid to the O–ring.
(c) Install the port union with the bolt.

Torque: 13 N

⋅

m (135 kgf

⋅

cm, 10 ft

⋅

lbf)

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)

CO–41

INSTALLATION OF HYDRAULIC PUMP

(See Components on page

CO–26

)

1.

INSTALL HYDRAULIC PUMP
(a) Install the hydraulic pump, solenoid valve connector

clamp and engine speed sensor wire clamp with the two
bolts and two nuts.

Torque:

12 mm head 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

14 mm head 20 N

⋅

m (310 kgf

⋅

cm, 22 ft

⋅

lbf)

HINT: Each bolt length is indicated in the illustration.
Bolt length:

A 106 mm (4.17 in.) for 12 mm head
B 114 mm (4.49 in.) for 14 mm head

(b) Connect the solenoid valve connector.

2. CONNECT PRESSURE AND SUCTION HOSES TO

HYDRAULIC PUMP
(a) Connect the pressure hose with new gasket and union

bolt.

Torque: 64 N

⋅

m (650 kgf

⋅

cm, 47 ft

⋅

lbf)

(b) Connect suction hose.

3.

INSTALL RH NO.2 TIMING BELT COVER
(a) Install the four gaskets to the timing belt cover.
(b) Install the connector grommet to the timing belt cover.
(c) Install the timing belt cover with the five bolts.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

HINT (12 mm head bolt): Use bolts 106 mm (4.17 in.) in
length.

(d) Install the wire clamp to the timing belt cover.
(e) Install

the

cam position sensor wire to the wire clamp on

the timing belt cover.

(f)

Install the cam position sensor connector to the ignition
coil bracket.

4.

INSTALL LH NO.2 TIMING BELT COVER
(a) Install the two gaskets to the timing belt cover.
(b) Run the cam position sensor wire through the timing belt

cover hole.

(c) Install the timing belt cover and connector bracket with

the three bolts.

(d) Connect the cam position sensor connector.
(e) Install the cam position sensor connector to the

connector bracket.

(f) Install

the

cam position sensor wire to the wire clamp on

the timing belt cover.

(g) Install the connector grommet to the timing belt cover.

CO–42

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)

5.

INSTALL DRIVE BELT IDLER PULLEY
Install the idler pulley and cover plate with the pulley bolt.

Torque: 37 N

⋅

m (380 kgf

⋅

cm, 27 ft

⋅

lbf)

6.

CONNECT RADIATOR HOSE TO WATER INLET

7.

INSTALL RH NO.3 TIMING BELT COVER
(a) Install the three gaskets to the timing belt cover.
(b) Fit portion A of the timing belt cover, matching it with the

lower high–tension cord cover.

(c) Install the timing belt cover with the three bolts.

8.

INSTALL VSV FOR EVAP SYSTEM
Install the VSV with the two bolts.

9.

INSTALL LH NO.3 TIMING BELT COVER
(a) Install the three gaskets to the timing belt cover.
(b) Install the cord grommet to the high–tension cord.
(c) Install the cord grommet to the timing belt cover.
(d) Fit portion A of the timing belt cover, matching it with the

lower high–tension cord cover.

(e) Install the timing belt cover with the four bolts.

10. INSTALL RH ENGINE WIRE COVER

(a) Fit portions A and B of the engine wire cover, matching

them with the lower high–tension cord cover and No.3
timing belt cover.

(d) Install the engine wire cover with the bolt.

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)

CO–43

11. INSTALL LH ENGINE WIRE COVER

(a) Connect portions A and B engine wire cover to the wire

brackets.

(b) Set the VSV (for fuel pressure control system) wire in

original position.

(c) Fit portions C and D of the engine wire cover, matching

them with the lower high–tension cord cover and No.3
timing belt cover.

(d) Install the engine wire cover with the two bolts.

12. INSTALL UPPER HIGH–TENSION CORD COVER

(a) Fit portion A of the upper high–tension cover, matching

it with the top of the lower high–tension cord cover.

(b) Push the front side of the high–tension cord cover, and

connect the front side claw groove of the upper
high–tension cord cover to the claw of the lower
high–tension cord cover.

(c) Install the upper high–tension cord cover with the two

bolts.

13. INSTALL INTAKE AIR CONNECTOR

(a) Connect the end portions of the intake air connector to

the throttle body and air cleaner hose.

(b) Tighten the two hose clamps.
(c) Install the bolt holding the intake air connector to the

cylinder head cover.

(d) Connect the following hoses:

(1)

Air hose to ISC valve

(2)

Air hose (from PS air control valve) to intake air con-
nector

CO–44

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)