Lexus SC300 / Lexus SC400. Service manual — part 320

REMOVAL OF RADIATOR

(See Components on page

CO–15

)

1. REMOVE

BATTERY

CAUTION: Work must be started after approx. 20 seconds or
longer from the time the ignition switch is turned to the
”LOCK” position and the negative (–) terminal cable is dis-
connected from the battery.

2.

REMOVE ENGINE UNDER COVERS

3.

DRAIN ENGINE COOLANT (See page

CO–6

)

4. REMOVE

RADIATOR

RESERVOIR

TANK

(a) Disconnect the coolant level sensor connector.
(b) Disconnect the following hoses:

(1)

Reservoir hose from water inlet housing

(2)

Reservoir hose from radiator

(c) Remove the two bolts and reservoir tank bracket.
(d) Disconnect the reservoir tank from the reservoir tank

bracket, and remove the reservoir tank.

5. DISCONNECT

HOSES

Disconnect the following hoses:

(1)

Upper radiator hose from radiator

(2)

Lower radiator hose from radiator

(3)

Two oil cooler hoses (for A/T) from radiator. Plug
hose end.

CO–16

–

COOLIING SYSTEM

Radiator

(4) Pressure hose from hydraulic motor
(5) Return hose from hydraulic motor

6. DISCONNECT COOLING FAN INLET PIPE FROM FAN

SHROULD
Remove the two bolts, brackets and bushings, and discon-
nect the inlet pipe.

7.

DISCONNECT COOLING FAN RESERVOIR TANK FROM
FAN SHROULD
(a) Disconnect the suction hose from the clamp on the fan

shrould.

(b) Remove the four bolts, and disconnect the reservoir

tank.

8. DISCONNECT WATER TEMPERATURE SENSOR

CONNECTOR
(a) Disconnect the water temperature sensor connector.
(b) Disconnect the wire clamp from the radiator fan shrould.

9. REMOVE

RADIATOR

(a) Remove the two bolts, screw and upper radiator

support. Remove the two upper radiator supports.

–

COOLIING SYSTEM

Radiator

CO–17

(b) Slightly lift the radiator, and disconnect the two oil cooler

hoses (for cooling fan) from the hose clamp on the
radiator fan shrould.

(c) Remove the radiator.
(d) Remove the two lower radiator supports.

10. REMOVE FAN SHROULD FROM RADIATOR

Remove the four bolts and fan shrould.

INSTALLATION OF RADIATOR

(See Components on page

CO–15

)

1.

INSTALL FAN SHROULD TO RADIATOR
Install the fan shrould with the four bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

2. INSTALL

RADIATOR

(a) Install the two lower radiator supports to the radiator.

(b) Place the radiator on the body bracket.
(c) Slightly lift the radiator, and connect the two oil cooler

hoses (for cooling fan) to the hose clamp on the radiator
fan shrould.

CO–18

–

COOLIING SYSTEM

Radiator

(d) Install the upper radiator support with the two bolts and

screw. Install the two upper radiator supports.

Torque: 12 N

⋅

m (120 kgf

⋅

cm, 9 ft

⋅

lbf)

3. CONNECT WATER TEMPERATURE SENSOR

CONNECTOR
(a) Connect the water temperature sensor connector.
(b) Install the wire clamp to the radiator fan shrould.

4. INSTALL COOLING FAN RESERVOIR TANK TO FAN

SHROULD
(a) Install the reservoir tank with the four bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

(b) Install the suction hose to the clamp on the fan shrould.

5.

INSTALL COOLING FAN INLET PIPE TO FAN SHROULD
Install the inlet pipe with the two bushings, brackets and
bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

6. CONNECT

HOSES

Connect the following hoses:

(1) Pressure hose to hydraulic motor Connect the pres-

sure hose with a new gasket and union bolt.

Torque: 64 N

⋅

m (650 kgf

⋅

cm, 47 ft

⋅

lbf)

(2) Return hose to hydraulic motor

–

COOLIING SYSTEM

Radiator

CO–19