Suzuki Baleno Manual page 1638

6B-6 ENGINE COOLING
THERMOSTAT
A wax pellet type thermostat is used in the coolant outlet passage
to control the flow of engine coolant, to provide fast engine warm
up and to regulate coolant temperatures.
A wax pellet element is hermetically contained in a metal case, and
expands when heated and contracts when cooled.
When the pellet is heated and expands, the metal case pushes
down the valve to open it.
As the pellet is cooled, the contraction allows the spring to close the
valve.
Thus, the valve remains closed while the coolant is cold, preventing
circulation of coolant through the radiator.
At this point, coolant is allowed to circulate only throughout the en-
gine to warm it quickly and evenly.
As the engine warms, the pellet expands and the thermostat valve
opens, permitting coolant to flow through the radiator.
In the top portion of the thermostat, an air bleed valve is provided;
this valve is for venting out the gas or air, if any, that is accumulated
in the circuit.
Temp. at which
valve begins to open
Temp. at which
valve becomes fully open
Valve lift
1. Air bleed valve
SY413/SY416
88 C (190 F)
100 C (212 F)
More than
8 mm at 100 C
Thermostat functional spec.
SY418
82 C (180 F)
95 C (203 F)
More than
8 mm at 95 C
1.5 C (2.7 F)