Run the engine at low idle until oil pressure reaches 69
kPa [10 psi] minimum.
Immediately load the engine to full power so that air
temperature rises more quickly than the coolant
temperature.
Observe air sensing shutterstat switch actuating shutters
when the intake air reaches temperatures of 66°C to
99°C [150°F to 210°F].
If the air sensing shutterstat switch does not actuate
shutters when intake air temperature reaches 99°C
[210°F], the shutterstat sensor is defective.
NOTE: Air sensing shutterstat switch will not actuate the
shutters until the intake manifold air temperature rises to
66°C to 99°C [150°F to 210°F] even though the sensing
switch is labeled 66°C [150°F].
Radiator Shutter Operation (1-17) Section 1 - Cooling System
N14Page 1-40
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