Liberty 4WD V6-3.7L (2009)
Coolant Reservoir: Description and Operation
Description - Pressure System
PRESSURE SYSTEM
This system works on the principal of a closed and deaerated system using thermally generated pressure. The expansion and contraction of the coolant in
the pressurized closed system keeps it free of trapped air. It provides:
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A pressurized surge tank volume for expansion and contraction.
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A non-pressurized overflow volume to capture excess coolant expansion and allow for it's return to the pressurized system.
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A pressurized cap on the pressure bottle rather than the radiator. This facilitates deaeration of the system.
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Reserve coolant is included in the pressurized volume to account for minor leaks and evaporation or boiling losses.
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Provides a warning light for low coolant level.
