Thermostat Removal, Inspection And Installation; Remove Thermostat; Place Thermostat In Intake Manifold - Toyota 22R-E Service Manual

EG1–228
ENGINE – COOLING SYSTEM
THERMOSTAT
THERMOSTAT REMOVAL
1. DRAIN COOLANT
2. DISCONNECT FOLLOWING HOSES:
(a) Vacuum hoses
(b) PCV hose
(c) (with A/C)
Idle–up hose
3. DISCONNECT RADIATOR INLET HOSE

4. REMOVE THERMOSTAT

(a) Remove the two bolts and water outlet from the
intake manifold.
(b) Remove the thermostat with the gasket.
(c) Remove the gasket from the thermostat.
THERMOSTAT INSPECTION
HINT: The 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:
86–90SC (187–184SF)
Valve lift:
8 mm (0.31 in.) or more at 100SC (212SF)
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, and replace if it is not tight.
THERMOSTAT INSTALLATION

1. PLACE THERMOSTAT IN INTAKE MANIFOLD

(a) Place a new gasket to the thermostat.
(b) Install the thermostat to the intake manifold.
(c) Install the water outlet with the two bolts.
Torque: 19 N–m (195 kgf–cm, 14 ft–lbf)
2. CONNECT RADIATOR INLET HOSE
3. CONNECT FOLLOWING HOSES: