Lexus GS300/400 (2000 year). Service manual — part 120

B01863
B01866

B02081

8

7

6

5

4

3

2

1

Stopper
Bolt

SST

Tank

Lock
Plate

B01861

(1)

(2)

(3)

(1)

(1)

(1)

(1)

(3)

(3)

(3)

(3)

B01864

B01870

B02082

B01869

H

–

COOLING (2JZ–GE)

RADIATOR

CO–21

1559

5.

CAULK LOCK PLATE

(a)

Lightly press SST against the lock plate in the order
shown in the illustration. After repeating this a few times,
fully caulk the lock plate by squeezing the handle until
stopped by the stopper plate.
SST

09230–01010

HINT:

Do not stake the areas protruding around the ports (1),
flange (2) and bracket (3).

The points shown in the illustration cannot be staked with
the SST. Use pliers or similar object and be careful not to
damage the core plates.

(b)

Check the lock plate height (H) after completing the caulk-
ing.
Plate height (H): 7.40 – 7.80 mm (0.2913 – 0.3071 in.)

If not within the specified height, adjust the stopper bolt of the
handle again and caulk again.
6.

INSTALL ECT SWITCH

(a)

Install a new O–ring to the ECT switch.

(b)

Install the ECT switch.

7.

INSTALL DRAIN PLUG

(a)

Install a new O–ring to the drain plug.

B01860

SST

B01871

Tank

Lock
Plate

O–Ring

CO–22

–

COOLING (2JZ–GE)

RADIATOR

1560

(b)

Install the drain plug.

8.

INSTALL RADIATOR CAP

9.

INSPECT FOR WATER LEAKS

(a)

Tighten the drain plug.

(b)

Plug the inlet pipes of the radiator with SST.
SST

09230–01010

(c)

Using a radiator cap tester, apply pressure to the radiator.
Test pressure: 177 kPa (1.8 kgf/cm

2

, 26 psi)

(d)

Submerge the radiator in water.

(e)

Inspect for leaks.

HINT:
On radiators with resin tanks, there is a clearance between the
tank and lock plate where a minute amount of air will remain,
giving the appearance of an air leak when the radiator is sub-
merged in water. Therefore, before doing the water leak test,
first swish the radiator around in the water until all air bubbles
disappear.
10.

INSTALL NEW PACKINGS

CO0AC–01

B01881

–

COOLING (2JZ–GE)

RADIATOR

CO–23

1561

INSTALLATION

1.

INSTALL ELECTRIC COOLING FAN TO RADIATOR

(a)

Install the electric cooling fan with the 6 bolts.
Torque: 5.0 N·m (50 kgf·cm, 44 in.·lbf)

(b)

Connect the radiator reservoir hose to the radiator.

2.

INSTALL RADIATOR AND ELECTRIC COOLING FAN
ASSEMBLY

(a)

Install the 2 lower radiator supports to the radiator.

(b)

Attach the 2 lower radiator supports on the radiator to the
body bracket.

(c)

Install the radiator and electric cooling fan assembly with
the 2 upper radiator supports and 2 nuts.
Torque: 13.5 N·m (135 kgf·cm, 10 ft·lbf)

(d)

Connect these parts:

Upper radiator hose to radiator

Lower radiator hose to radiator

ECM outlet duct to ECM box

Wire for electric cooling fan to clamp on electric
cooling fan

2 electric cooling fan connectors

ECT switch connector for electric cooling fan

2 oil cooler hoses for A/T to radiator

3.

INSTALL AIR CLEANER AND MAF METER AS-
SEMBLY

4.

INSTALL AIR CLEANER INLET

5.

FILL WITH ENGINE COOLANT

6.

START ENGINE AND CHECK FOR ENGINE COOLANT
AND A/T FLUID LEAKS

7.

INSTALL ENGINE UNDER COVER

B01900

CO0AD–03

B00922

ECT
Switch
Connector

B02072

B02073

Ammeter

Battery

(+)

(–)

CO–24

–

COOLING (2JZ–GE)

ELECTRIC COOLING FAN

1562

ELECTRIC COOLING FAN

ON–VEHICLE INSPECTION

1.

CHECK COOLING FAN OPERATION WITH LOW
TEMPERATURE (Below 83

°

C (181

°

F))

(a)

Turn the ignition switch ON.

(b)

Check that the cooling fan stops.

If not, check the cooling fan relay and ECT switch, and check
for a separated connector or severed wire between the cooling
fan relay and ECT switch.
(c)

Disconnect the ECT switch connector.

(d)

Check that the cooling fan rotates.

If not, check the fuses, radiator fan main relay, cooling fan relay,
cooling fan, and check for a short circuit between the cooling
fan relay and ECT switch.
(e)

Reconnect the ECT switch connector.

2.

CHECK COOLING FAN OPERATION WITH HIGH
TEMPERATURE (Above 93

°

C (199

°

F))

(a)

Start the engine, and raise coolant temperature to above
93

°

C (199

°

F).

HINT:
Coolant temperature is the detected value by the ECT switch
on the radiator lower tank.
(b)

Check that the cooling fan rotates.

If not, replace the ECT switch.

3.

INSPECT COOLING FANS

(a)

Disconnect the cooling fan connector.

(b)

Connect battery and ammeter to the cooling fan connec-
tor.

(c)

Check that the cooling fan rotates smoothly, and check
the reading on the ammeter.
Standard amperage: 8.5 – 11.5 A at 20

°

C (68

°

F)

(d)

Reconnect the cooling fan connector.