Lexus ES300 (1997 year). Manual - part 300

CO02T–01

S04532

Stud Bolt

Jiggle Valve

15

°

15

°

CO–12

–

COOLING

THERMOSTAT

929

1997 LEXUS ES300   (RM511U)

INSTALLATION

1.

PLACE THERMOSTAT IN WATER PUMP

(a)

Install a new gasket on to the thermostat.

(b)

Align the thermostat jiggle valve with the upper stud bolt,
and insert the thermostat in the water inlet housing.

HINT:
The jiggle valve may be set within 15

°

 of either side of the pre-

scribed position.
2.

INSTALL WATER INLET

Install the water inlet with the 3 nuts.

Torque: 8 N·m (80 kgf·cm, 69 in.·lbf)

3.

INSTALL WATER INLET PIPE

(a)

Install a new O–ring to the water inlet pipe.

(b)

Apply soapy water to the O–ring.

(c)

Connect the water inlet pipe to the water inlet.

(d)

Install the bolt holding the water inlet pipe to the cylinder
head.
Torque: 19.5 N·m (200 kgf·cm, 14 ft·lbf)

4.

INSTALL ENGINE WIRE PROTECTOR

5.

CONNECT ECT SWITCH CONNECTOR

6.

REINSTALL AIR FILTER AND AIR CLEANER CAP
ASSEMBLY

7.

FILL WITH ENGINE COOLANT

8.

START ENGINE AND CHECK FOR LEAKS

9.

RECHECK ENGINE COOLANT LEVEL

CO02U–01

–

COOLING

RADIATOR

CO–13

930

1997 LEXUS ES300   (RM511U)

RADIATOR
ON–VEHICLE CLEANING

Using water or a steam cleaner, remove any mud or dirt from the radiator core.
NOTICE:
If using a high pressure type cleaner, be careful not to deform the fins of the radiator core. (i.e. Main-
tain a distance between the cleaner nozzle radiator core)

CO02V–01

Z00570

Radiator Cap Tester

30

°

 or More

Radiator Cap

P13014

Radiator Cap
Tester

CO–14

–

COOLING

RADIATOR

931

1997 LEXUS ES300   (RM511U)

ON–VEHICLE INSPECTION

1.

REMOVE RADIATOR CAP

CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blow out under pressure.
2.

INSPECT RADIATOR CAP

NOTICE:

If the radiator cap has contaminations, always rinse
it with water.

When performing steps (a) and (b) below, keep the ra-
diator pump tester at an angle of over 30

°

 above the

horizontal.

Before using a radiator cap tester, wet the relief valve
and pressure valve with engine coolant or water.

(a)

Using a radiator cap tester, slowly pump the tester and
check that air is coming from the vacuum valve.
Pump speed: 1 push/(3 seconds or more)

NOTICE:
Push the pump at a constant speed.
If air is not coming from the vacuum valve, replace the radiator
cap.
(b)

Pump the tester and measure the relief valve opening
pressure.
Pump speed: 1 push within 1 second

NOTICE:
This pump speed is for the first pump only (in order to close
the vacuum valve). After this, the pump speed can be re-
duced.

Standard opening pressure:
83 – 113 kPa (0.85 – 1.15 kgf/cm

2

, 12.1 – 16.4 psi)

Minimum opening pressure:
69 kPa (0.7 kgf/cm

2

, 10.0 psi)

HINT:
Use the tester’s maximum reading as the opening pressure.
If the opening pressure is less than minimum, replace the radia-
tor cap.
3.

INSPECT COOLING SYSTEM FOR LEAKS

(a)

Fill the radiator with coolant and attach a radiator cap tes-
ter.

(b)

Warm up the engine.

(c)

Pump it to 127 kPa (1.3 kgf/cm

2

, 18.5 psi), and check that

the pressure does not drop.

If the pressure drops, check the hoses, radiator or water pump
for leaks. If no external leaks are found, check the heater core,
cylinder block and cylinder head.
4.

REINSTALL RADIATOR CAP

S04744

Radiator

No.2 Cooling Fan

A/T Oil Cooler Hose

Lower
Radiator
Hose

No.1 ECT Switch Wire

No.1 Cooling Fan

 O–ring

No.1 ECT Switch

No.2 Cooling Fan Connector

Upper Radiator Support

Upper Radiator Hose

No.1 Cooling Fan Connector

No.1 ECT Switch Wire Connector

Radiator
Assembly

Lower Radiator
Support

Drain Plug

Relay Block
(for Daytime Running Light System)

Lower Radiator Hose

A/T Oil Cooler Hose

Upper Radiator Support

 O–Ring

Lower Radiator
Support

 Non–reusable part

CO02W–01

–

COOLING

RADIATOR

CO–15

932

1997 LEXUS ES300   (RM511U)

COMPONENTS