Lexus RX300 (MCU15). Manual - part 187

B04395

Radiator Assembly

Radiator Reservoir Hose

Upper Radiator Hose

A/T Oil Cooler Hose

No.2 Electric Cooling
Fan Connector

Upper Radiator Support

Lower Radiator Hose

No.1 Electric Cooling
Fan Connector

Lower Radiator Support

No.1 Water Temperature
Switch Connector

Drain Plug

Radiator Cap

z O–Ring

–

COOLING

RADIATOR

CO–17

LEXUS RX300   (RM785E)

B04247

Radiator

Electric 
Cooling Fan

x 6

B04248

Upper Tank

z O–Ring

Core

Lower Tank

No.1 Water Temperature Switch

Drain Plug

Oil Cooler

Pipe

Nut

z O–Ring

z O–Ring

z O–Ring

Radiator Cap

Plate Washer

z Non–reusable part

z O–Ring

CO–18

–

COOLING

RADIATOR

LEXUS RX300   (RM785E)

CO06J–05

B04232

–

COOLING

RADIATOR

CO–19

LEXUS RX300   (RM785E)

REMOVAL

HINT:

S

AT the time of installation, please refer to the following
items.

S

Start the engine, and check for coolant and A/T fluid
leaks.

S

Check the A/T fluid level (See page DI–144).

1.

REMOVE ENGINE UNDER COVER

2.

DRAIN ENGINE COOLANT

3.

REMOVE A/C CONDENSER (See page AC–55)

4.

REMOVE RADIATOR ASSEMBLY

(a)

Disconnect these connectors and hoses:
(1)

Disconnect the No.1 electric cooling fan connector.

(2)

Disconnect the No.2 electric cooling fan connector.

(3)

Disconnect the No.1 water temperature switch con-
nector.

(4)

Disconnect the upper radiator hose from radiator.

(5)

Disconnect the lower radiator hose from radiator.

(6)

Disconnect the radiator reservoir hose.

(7)

Disconnect the 2 oil cooler hoses from radiator.

(b)

Remove the 2 bolts and 2 upper radiator supports.
Torque: 12.8 N·m (130 kgf·cm, 9 ft·lbf)

(c)

Lift out the radiator assembly.

(d)

Remove the 2 lower radiator supports.

5.

REMOVE ELECTRIC COOLING FAN FROM RADIA-
TOR

Remove the 6 bolts and cooling fan.

Torque: 5.0 N·m (50 kgf·cm, 44 in.·lbf)

CO0II–02

B04250

CO1205

Dimension ”B”

Overhaul Handle

Stopper Bolt

SST

Part ”A”

Claw

B04235

Stopper
Bolt

SST

Tank

Lock
Plate

B04234

Tap

B04233

CO–20

–

COOLING

RADIATOR

LEXUS RX300   (RM785E)

DISASSEMBLY

1.

REMOVE NO.1 WATER TEMPERATURE SWITCH

(a)

Remove the No.1 water temperature switch.

(b)

Remove the O–ring.

2.

REMOVE DRAIN PLUG

(a)

Remove the drain plug.

(b)

Remove the O–ring.

3.

ASSEMBLE SST
SST

09230–01010

(a)

Install the claw to the overhaul handle, inserting it in the
hole in part ”A” as shown in the diagram.

(b)

While gripping the handle, adjust the stopper bolt so that
dimension ”B” shown in the diagram is 0.2 – 0.3 mm
(0.008 – 0.012 in.).

NOTICE:
If this adjustment is not done the claw may be damaged.

4.

UNCAULK LOCK PLATES

Using SST to release the caulking, squeeze the handle until
stopped by the stopper bolt.

SST

09230–01010

5.

REMOVE TANKS AND O–RINGS

Lightly tap the bracket of the radiator (or radiator inlet or outlet)
with a soft–faced hammer, and remove the tank and the O–ring.

6.

REMOVE OIL COOLER FROM LOWER TANK

(a)

Loosen the nut, and remove the cooler pipe.
Remove the 2 cooler pipes.

(b)

Remove the 2 nuts and plate washers.

(c)

Remove the oil cooler and 2 O–rings.