Previa Van 2WD L4-148.8 2438cc 2.4L DOHC (2TZ-FE) (1992)
Thermostat: Service and Repair
REMOVAL
1. DISCONNECT RADIATOR OUTLET HOSE
2. REMOVE THERMOSTAT
(a) Remove the two nuts, water inlet and thermostat with gasket from the water pump.
(b) Remove the gasket from the 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.
If the valve opening temperature and valve lift are not within the following specifications, replace the thermostat.
Valve opening temperature: 80-84 C. (178-183 F.)
Valve lift: More than 8mm (0.31 In.) at 95 C. (203 F.)
(c) Check that valve spring is tight when the thermostat is fully closed. Replace as necessary.
INSTALLATION