Thermostat Removal; Thermostat Inspection; Thermostat Installation - Toyota 22R-E Service Manual

EG2–268
ENGINE – COOLING SYSTEM
THERMOSTAT

THERMOSTAT REMOVAL

1. DRAIN ENGINE COOLANT
2. DISCONNECT RADIATOR OUTLET HOSE
3. REMOVE THERMOSTAT
(a) Remove the three nuts, water inlet and thermostat
with gasket from the water pump.
(b) Remove the gasket from the thermostat.

THERMOSTAT INSPECTION

HINT: Thermostat is numbered according to the valve
opening temperature.
(a) Immerse the thermostat in water and heat the water
gradually.
(b) Check the valve opening temperature and valve lift.
Valve opening temperature:
80 – 84 SC (176 – 183 SF)
Valve lift:
8 mm (0.31 in.) or more at 95 SC (203 SF)
If the valve opening temperature and valve lift are not
within specifications, replace the thermostat.
(c) Check that the valve spring is tight when the ther–
mostat is fully closed.
If not tight, replace the thermostat.

THERMOSTAT INSTALLATION

1. INSTALL THERMOSTAT
(a) Place a new gasket to the thermostat.
(b) Install the thermostat with the jiggle valve upward.
2. INSTALL WATER INLET
Install the water inlet with the three nuts.
Torque: 20 N–m (200 kgf–cm, 14 ft–lbf)
3. CONNECT RADIATOR OUTLET HOSE
4. FILL WITH ENGINE COOLANT
5. START ENGINE AND CHECK FOR LEAKS