6B–4 ENGINE COOLING
1. Loosen the fixing bolts to remove the water outlet
pipe. Discard the gaskets.
2. Remove the thermostats.
Inspection and Repair
Make necessary adjustment, repairs, and part
replacements if excessive wear or damage is
discovered during inspection.
1. Check the wax pellet for leakage.
2. Check the springs for damage and weakness.
3. Check the caulking for cracks.
Thermostat operation test
1. Prepare a container large enough to completely
contain the thermostat.
2. Fill the container with cold water.
3. Completely immerse the thermostat in the cold
water.
4. Place a piece of wood between the thermostat and
the bottom of the container (see illustration).
5. Place a thermometer in the water.
6. Heat the water. Stir constantly to prevent direct heat
application to the thermostat.
7. Note the temperature at which the thermostat begins
to open.
Initial opening temperature: 82°C (180°F)
8. Note the temperature at which the thermostat opens
completely.
Full open temperature: 95°C (203°F)
9. Measure the thermostat opening height at the fully
open position.
Opening height at full open: 8 mm(0.31 in)
Reassembly
1. Install the thermostats to the cylinder head.
The thermostat with the jiggle valve is installed to the left
side (intake manifold side) of the engine. The jiggle
valve faces the rear of the engine (flywheel side).
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