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TECH TIPS:
RADIATOR
The
thermostat in an engine block is designed to regulate the flow
of coolant into the radiator
from the engine.
The degree
designation
(Ex: 185 Degree) refers to the temperature in which the thermostat
will open.
A LOWER TEMPERATURE THERMOSTAT WILL NOT NECESSARILY LOWER ENGINE
TEMPERATURE.
In some instances, a lower temperature thermostat can actually
raise operating temperature by not regulating coolant flow.
For example, if a
165 degree thermostat is installed into an engine that normally
operates at
190 degrees, the thermostat will stay open at all times once
engine temperature exceeds 165 degrees. Thus, there is nothing
to regulate the flow of coolant into
the radiator.
Without anything to regulate the coolant flow, the coolant will
pass through the radiator before the heat can be removed from
it creating an upward spiral in engine temperature.
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