Grand Caravan AWD V6-229 3.8L VIN L MFI (1997)
Thermostat: Description and Operation
TYPE
The engine cooling thermostats are a wax pellet driven, reverse poppet choke type.
OPERATING RANGES
Warm up
They are designed to provide the fastest warm up possible by preventing leakage through them and to guarantee a minimum engine operating
temperature of 88 - 93°C (192 - 199°F).
Fully Warm Engine
They also automatically reach wide open so they do not restrict flow to the radiator as temperature of the coolant rises in hot weather to around
104°C (220°F). Above this temperature the coolant temperature is controlled by the fan, the radiator, and the ambient temperature, not the
thermostat.
