Thermostat: Service and Repair

REMOVAL AND INSTALLATION

REMOVAL SERVICE POINT
[A] RADIATOR LOWER HOSE DISCONNECTION





After making mating marks on the radiator hose and the hose clamp, disconnect the radiator hose.

INSTALLATION SERVICE POINTS
]A[ THERMOSTAT INSTALLATION





Install the thermostat so that the jiggle valve is facing straight up and is aligned with the mark on the thermostat case as shown in the illustration.

CAUTION: Make absolutely sure that no oil is adhering to the rubber ring of the thermostat. In addition, be careful not to fold over or scratch the rubber ring when inserting.

]B[ RADIATOR LOWER HOSE CONNECTION





1. Insert each hose as far as the projection of the water outlet fitting or water inlet fitting.





2. Align the mating marks on the radiator hose and hose clamp, and then connect the radiator hose.

INSPECTION
THERMOSTAT CHECK





- Check that valve closes tightly at room temperature.
- Check for defects or damage.
- Check for rust or encrustation on valve. Remove if any.
- Immerse thermostat in container of water. Stir to raise water temperature and check that thermostat valve opening temperature and the temperature with valve fully open [valve lift-over 8 mm (0.31 inch)] is at the standard value.





Standard value:
Valve opening temperature. 88°C (192°F)
Full-opening temperature: 95°C (203 °F)

NOTE: Measure valve height when fully closed. Calculate lift by measuring the height when fully open.