Thermostat: Service and Repair

THERMOSTAT

COMPONENTS:

REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE V-BANK COVER SUB-ASSEMBLY
3. REMOVE COOL AIR INTAKE DUCT SEAL
4. REMOVE ENGINE ROOM SIDE COVER RH
5. REMOVE FRONT FENDER APRON SEAL RH
6. REMOVE NO. 2 ENGINE MOUNTING STAY RH
7. REMOVE ENGINE MOVING CONTROL ROD SUBASSEMBLY
8. REMOVE V-RIBBED BELT
9. REMOVE NO. 2 IDLER PULLEY SUB-ASSEMBLY
10. DISCONNECT RADIATOR HOSE OUTLET





11. REMOVE WATER INLET
(a) Remove the 2 nuts and water inlet.

12. REMOVE THERMOSTAT
(a) Remove the gasket from the thermostat.

INSPECTION





1. INSPECT THERMOSTAT
(a) Inspect the thermostat.

HINT: The valve opening temperature is inscribed on the thermostat.





(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 temperatures (below 40°C (104°F)).
If it is not fully 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° on either side of the prescribed position.





2. INSTALL WATER INLET
(a) Install the water inlet with the 2 nuts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)

3. CONNECT RADIATOR HOSE OUTLET
4. INSTALL NO. 2 IDLER PULLEY SUB-ASSEMBLY
5. INSTALL V-RIBBED BELT
6. INSTALL ENGINE MOVING CONTROL ROD SUBASSEMBLY
7. INSTALL NO. 2 ENGINE MOUNTING STAY RH
8. INSTALL FRONT FENDER APRON SEAL RH
9. ADD ENGINE COOLANT
10. CHECK FOR ENGINE COOLANT LEAKS
11. INSTALL V-BANK COVER SUB-ASSEMBLY
12. INSTALL ENGINE ROOM SIDE COVER RH
13. INSTALL COOL AIR INTAKE DUCT SEAL