Town Car V8-4.6L VIN W (1997)
Coolant Reservoir: Description and Operation
NOTE: When the water thermostat (8575) is closed, there is no flow through the degas bottle.
Trapped air in the cooling system must be removed. A pressurized radiant degas bottle system is used which continuously separates the air from
the cooling system. The degas bottle serves as the location for:
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Service fill.
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Coolant expansion during warm-up.
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System pressurization from the pressure relief cap.
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Air separation during operation.
When the water thermostat is open, coolant flows through the small hose from the top of the radiator outlet tank to the degas bottle. The degas
bottle separates any trapped air from the coolant and replenishes the system through its radiator coolant recovery hose.