Toyota 4Y 2006 Manual page 183

8 mm
(0.31 in.)
or more
2. Measure the temperature at which the valve starts to open,
and the temperature at which it is fully open.
Standard
Starts to open: 74.5 to 78.5"C (116 to 173°F)
Fully open: 95°C (203°F)
Lift amount when fully open: 8 mm (0.31 in.) or more
Note:
Replace the valve if it is open at room temperature, or if it does
not seal well.
[Point 21
Inspection:
lnspect the water pump.
Inspect the water pump rotor section for cracks, damage, and
obvious rust.
Manually rotate the water pump rotor to inspect for abnormal
bearing noise, and to see that it turns smoothly.
0
[Point 31
Reassembly:
Install the gasket to the thermostat, and then install it to the
water inlet.
Caution:
Make sure that the jiggle valve faces upward when installing
the thermostat.