Journey FWD V6-3.5L (2009)
Coolant Reservoir: Description and Operation
Operation - Pressure System
PRESSURE SYSTEM
The pressure chamber keeps the coolant free of trapped air, provides a volume for expansion and contraction, and provides a convenient and safe method
for checking and adjusting coolant level at atmospheric pressure. It also provides some reserve coolant to cover minor leaks, evaporation or boiling
losses. The overflow chamber allows coolant recovery in case of an overheat.