Removal
- Remove the left air cleaner box. (6-13)
- Place a rag under the thermostat cover.
- Remove the thermostat cover 1.
- Remove the thermostat 2.
Inspection
- Inspect the thermostat pellet for signs of cracking.
- Test the thermostat at the bench for control action, in the following manner.
- Pass a string 1 between flange 2 of thermostat, as shown.
- Immerse the thermostat in the water contained in a beaker, as shown in the illustration. Note that the immersed thermostat is in suspension. Heat the water 3 by placing the beaker on a stove 4 and observe the rising temperature on a thermometer 5.
- Read the thermometer just when opening the thermostat. This reading, which is the temperature level at which the thermostat valve begins to open, should satisfy the standard value.
Thermostat valve opening temperature:
- Standard: Approx. 88°C (190°F)
- Keep on heating the water to raise its temperature.
- Just when the water temperature reaches specified value, the thermostat valve should have lifted by at least 8 mm (0.31 in).
Thermostat valve lift А:
- Standard: 8.0 mm and over at 100°C (0.31 in and over at 212°F)
- A thermostat failing to satisfy either of the two requirements (start-to-open temperature and valve lift) must be replaced.
Installation
- Install the thermostat.
Note: The jiggle valve А of the thermostat faces upside.
- Install the thermostat cover 1.
- Tighten the thermostat cover bolts.
- Install the left air cleaner box.
- Pour engine coolant. (2-21)