Lexus ES300 (1997 year). Manual - part 299

CO02P–01

P12942

CO–8

–

COOLING

WATER PUMP

925

1997 LEXUS ES300   (RM511U)

INSTALLATION

1.

INSTALL WATER PUMP

Install a new gasket and the water pump with the 4 bolts and 2
nuts.

Torque: 6 N·m (60 kgf·cm, 53 in.·lbf)

NOTICE:
Do not get oil on the gasket.
2.

INSTALL NO.3 TIMING BELT COVER
(See page 

EM–52

)

3.

INSTALL NO.2 IDLER PULLEY
(See page 

EM–20

)

4.

INSTALL CAMSHAFT TIMING PULLEYS
(See page 

EM–20

)

5.

INSTALL TIMING BELT
(See page 

EM–20

)

6.

FILL WITH ENGINE COOLANT

7.

START ENGINE AND CHECK FOR LEAKS

8.

RECHECK ENGINE COOLANT LEVEL

CO02Q–04

A13162

EGR Vacuum Hose

MAF Meter Connector

EVAP Hose

Air Cleaner Cap
Assembly

Air Filter

Engine Wire Protector

No.2 ECT
Switch

Connector

Thermostat

 Gasket

Water Inlet

Water Inlet
Pipe

N·m (kgf·cm, ft·lbf)

 Non–reusable part

: Specified torque

 O–Ring

19.5 (200, 14)

8 (80, 69 in.·lbf)

–

COOLING

THERMOSTAT

CO–9

926

1997 LEXUS ES300   (RM511U)

THERMOSTAT

COMPONENTS

CO02R–01

S04581

S04502

S04503

CO–10

–

COOLING

THERMOSTAT

927

1997 LEXUS ES300   (RM511U)

REMOVAL

HINT:
Removal of the thermostat would have an adverse effect, caus-
ing a lowering of cooling efficiency. Do not remove the thermo-
stat, even if the engine tends to overheat.
1.

DRAIN ENGINE COOLANT

2.

REMOVE AIR CLEANER CAP ASSEMBLY AND AIR
FILTER

3.

DISCONNECT ECT SWITCH CONNECTOR

4.

DISCONNECT ENGINE WIRE PROTECTOR FROM
WATER INLET AND RH CYLINDER HEAD

Remove the 2 nuts, and disconnect the engine wire protector
from the water inlet and cylinder head.

5.

DISCONNECT WATER INLET PIPE FROM WATER
INLET AND LH CYLINDER HEAD

(a)

Remove the bolt, and disconnect the inlet pipe from the
water inlet.

(b)

Remove the O–ring from the inlet pipe.

6.

REMOVE WATER INLET AND THERMOSTAT

(a)

Remove the 3 nuts, water inlet and thermostat.

(b)

Remove the gasket from the thermostat.

CO02S–01

P13255

CO0601

Z10579

10 mm

–

COOLING

THERMOSTAT

CO–11

928

1997 LEXUS ES300   (RM511U)

INSPECTION

INSPECT THERMOSTAT
HINT:
The thermostat is numbered with the valve opening tempera-
ture.

(a)

Immerse the thermostat in water and gradually heat the
water.

(b)

Check the valve opening temperature.
Valve opening temperature:
80 – 84

°

C (176 – 183

°

F)

If the valve opening temperature is not as specified, replace the
thermostat.

(c)

Check the valve lift.
Valve lift: 10.0 mm (0.394 in.) or more at 95

°

C (203

°

F)

If the valve lift is not as specified, replace the thermostat.
(d)

Check that the valve is fully closed when the thermostat
is at low temperatures (below 40

°

C (104

°

F)).

If not closed, replace the thermostat.