Thermostat: Service and Repair
THERMOSTATCOMPONENTS (Part 1):
COMPONENTS (Part 2):
COMPONENTS (Part 3):
COMPONENTS (Part 4):
COMPONENTS (Part 5):
REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE V-BANK COVER SUB-ASSEMBLY
3. REMOVE ENGINE MOVING CONTROL ROD
4. REMOVE ENGINE MOUNTING CONTROL BRACKET
5. REMOVE ENGINE MOUNTING BRACKET FRONT NO.1 LH
6. REMOVE FAN AND GENERATOR V BELT
7. REMOVE IDLER PULLEY SUB-ASSEMBLY NO.2
8. SEPARATE RADIATOR HOSE OUTLET
9. REMOVE WATER INLET
(a) Remove the 2 bolts and water inlet.
10. REMOVE THERMOSTAT
INSPECTION
1. INSPECT THERMOSTAT
(a) Inspect the thermostat.
HINT: The thermostat is numbered with the valve opening temperature.
(b) Immerse the thermostat in water and gradually heat the water.
(c) Check the valve opening temperature.
Valve opening temperature: 80 to 84°C (176 to 183°F)
If the valve opening temperature is not as specified, replace the thermostat.
(d) Check the valve lift.
Valve lift: 7.7 mm (0.3031 in.) or more at 95°C (203°F)
If the valve lift is not as specified, replace the thermostat.
(e) Check that the valve is fully closed when the thermostat is at low temperature (below 40°C (104°F)).
If not closed, replace the thermostat.
INSTALLATION
1. INSTALL THERMOSTAT
(a) Install a new gasket to the thermostat.
(b) Install the thermostat with the jiggle valve facing up.
HINT: The jiggle valve may be set within 10° of either side of the prescribed position.
2. INSTALL WATER INLET
Torque: 10 N*m (102 kgf/cm, 7 ft. lbs.)
3. INSTALL RADIATOR HOSE OUTLET
4. INSTALL IDLER PULLEY SUB-ASSEMBLY NO.2
5. INSTALL FAN AND GENERATOR V BELT
6. INSTALL ENGINE MOUNTING BRACKET FRONT NO.1 LH
7. INSTALL ENGINE MOUNTING CONTROL BRACKET
8. INSTALL ENGINE MOVING CONTROL ROD
9. INSTALL V-BANK COVER SUB-ASSEMBLY
10. ADD ENGINE COOLANT
11. INSPECT FOR COOLANT LEAK