Lexus GS300/400 (2000 year). Manual — part 117
CO0A2–03
B01987
Thermostat
Gasket
Water Inlet
Non–reusable part
CO–10
–
COOLING (2JZ–GE)
THERMOSTAT
1548
THERMOSTAT
COMPONENTS
CO0A3–01
B01940
–
COOLING (2JZ–GE)
THERMOSTAT
CO–11
1549
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.
DISCONNECT WATER INLET FROM WATER PUMP,
AND REMOVE THERMOSTAT
(a)
Remove the 2 nuts holding the water inlet to the water
pump, and disconnect the water inlet from the water
pump.
(b)
Remove the thermostat.
(c)
Remove the gasket from the thermostat.
CO0A4–01
P11116
CO0601
P03242
Valve
Lift
CO–12
–
COOLING (2JZ–GE)
THERMOSTAT
1550
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 lift is not as specified, replace the thermostat.
(c)
Check the valve lift.
Valve lift: 8.5 mm (0.335 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.
CO0A5–01
P11117
Protrusion
Jiggle Valve
–
COOLING (2JZ–GE)
THERMOSTAT
CO–13
1551
INSTALLATION
1.
PLACE THERMOSTAT IN WATER INLET
(a)
Install a new gasket to the thermostat.
(b)
Align the jiggle valve of the thermostat with the protrusion
of the water inlet.
2.
INSTALL WATER INLET
Install the water inlet with the 2 nuts.
Torque: 9.0 N·m (90 kgf·cm, 80 in.·lbf)
3.
FILL WITH ENGINE COOLANT
4.
START ENGINE AND CHECK FOR COOLANT LEAKS
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