Mazda 323 1988 Workshop Manual page 187

THERMOSTAT
3A
THERMOSTAT
REMOVAL AND INSTALLATION
1. Drain the coolant.
2. Remove the parts in the numbered sequence shown in the figure.
3. Install in the reverse order of removal.
1, Water hose
2~ Thermostat cover
3. Gasket
4. 2 stage thermostat
Note
a) The jiggle pin should be on the upper side.
b) Position the hose clamp in the original location on the hose and squeeze it lightly with
large pliers to ensure a good fit.
INSPECTION
Check the operation. Replace if necessary.
1, Visually check the valve to be sure it is air tight.
2. Place the thermostat and a thermometer in water,
gradually increase the water temperature, and then
check the following:
(1) Valve opening temperature
Sub-valve 63.5-86S"C (182-188'F)
Main valve 66.5-89.5"C (188-193OF)
(2) Full open lift
Sub-valve 1.5 mm (0.06 in) or
more at lOO"C (212°F)
Main valve 8 mm (0.31 in) or
more at 100°C (212OF)
(3) Valve closing temperature
Sub-valve 60% (176°F)
Main valve 83'C (181OF)
3A-7