Thermostat: Service and Repair

THERMOSTAT
REMOVAL OF THERMOSTAT
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY

CAUTION: Work must be started after approx. 20 seconds or longer from the time the ignition switch is turned to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.






2. DRAIN ENGINE COOLANT
3. REMOVE WATER INLET PIPE
4. DISCONNECT WATER TEMPERATURE SENSOR CONNECTOR
5. REMOVE WATER INLET Water Pump
Remove the three nuts and water inlet from the water pump.
6. REMOVE THERMOSTAT AND GASKET






INSPECTION OF THERMOSTAT
INSPECT THERMOSTAT

HINT:The thermostat is numbered with the valve opening temperature.

(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: 8.5 mm (0.335 in.) or more at 95°C (203°F) If the valve lift is less than specification, replace the thermostat.
(d) Check that the valve spring is tight when the thermostat is fully closed.






INSTALLATION OF THERMOSTAT
1. PLACE THERMOSTAT IN WATER PUMP
(a) Install a new gasket to the thermostat.
(b) Align the jiggle valve of the thermostat with stud bolt (A), and insert the thermostat in the water pump






2. INSTALL WATER INLET
Install the water inlet with the three nuts.
Torque: 200 kg-cm (14 ft-lb, 20 N.m)
3. CONNECT WATER TEMPERATURE SENSOR CONNECTOR
4. INSTALL WATER IN LET PIPE
5. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
6. FILL WITH ENGINE COOLANT
7. START ENGINE AND CHECK FOR LEAKS AND BLEED SYSTEM.