Lexus RX300 (MCU15). Service manual — part 185
CO07Z–03
P12942
–
COOLING
WATER PUMP
CO–9
LEXUS RX300 (RM785E)
INSTALLATION
1.
INSTALL WATER PUMP
Install a new gasket and the water pump with the 4 bolts and 2
nuts.
Torque: 8 N·m (80 kgf·cm, 69 in.·lbf)
NOTICE:
Do not get oil on the gasket.
2.
INSTALL NO.3 TIMING BELT COVER
(See page EM–60)
3.
INSTALL NO.2 IDLER PULLEY
(See page EM–22)
4.
INSTALL CAMSHAFT TIMING PULLEYS
(See page EM–22)
5.
INSTALL TIMING BELT
(See page EM–22)
6.
INSTALL FRONT UPPER SUSPENSION BRACE
(See page EM–82)
7.
INSTALL OUTER COWL TOP PANEL
(See page EM–82)
8.
FILL WITH ENGINE COOLANT
9.
START ENGINE AND CHECK FOR LEAKS
10.
RECHECK ENGINE COOLANT LEVEL
CO080–03
B12313
Air Flow Meter
Connector
EVAP Hose
Air Cleaner Cap
Engine Wire Protector
No.2 Water Temperature
Switch Connector
Thermostat
z Gasket
Water Inlet Pipe
Water Inlet
N·m (kgf·cm, ft·lbf)
z Non–reusable part
: Specified torque
z O–Ring
19.5 (200, 14)
8 (80, 69 in.·lbf)
Air Filter
V–Bank Cover
Air Cleaner Case
CO–10
–
COOLING
THERMOSTAT
LEXUS RX300 (RM785E)
THERMOSTAT
COMPONENTS
CO081–03
B04152
B04151
B04150
–
COOLING
THERMOSTAT
CO–11
LEXUS RX300 (RM785E)
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 AND AIR CLEANER
CASE
3.
DISCONNECT NO.2 WATER TEMPERATURE SWITCH
CONNECTOR
4.
DISCONNECT ENGINE WIRE PROTECTOR FROM
WATER INLET AND RH CYLINDER HEAD
Remove the nut and disconnect the clamp, 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.
CO082–02
P13255
CO0601
Z10579
10 mm
CO–12
–
COOLING
THERMOSTAT
LEXUS RX300 (RM785E)
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.
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