Pontiac FIREBIRD 1972 Service Manual page 635

ENGINE COOLING AND LUBRICATION
6A- 15
a. Immerse unit and thermometer in container of
water over a heater. While heating water, do not
rest either the thermometer or thermostat on bot-
tom of container as this will cause them to be at
a higher temperature than the water.
b. Agitate water to insure uniform temperature of
water, thermostat and thermometer.
A new thermostat (195") valve should start to
open (.002") at a temperature of 192°F. to 198°F.
and should be fully open (3/8" or more) at a
temperature not in excess of 222°F.
-
A used thermostat can be about 7°F. above or
below this setting (188"
-
202") without adverse
effect and should not be replaced. If thermostat
does not operate at specified temperatures, it
should be replaced as it cannot be adjusted.
3. Clean gasket. surfaces on housing and intake mani-
fold.
4. Install thermostat with pellet or cartridge projecting
down into water passage.
5. Using new gasket, install water outlet fitting. Tighten
bolts to 30 lb. ft.
VIEW "A"
(6 CY
L.)
Fig. 6A-19 Radiator Mountings
-
A Series