Jeep 2004 Liberty - Manual (Page 306)

Coolant Level
The coolant recovery bottle provides a quick visual
method for determining that the coolant level is ad-
equate. The coolant level must be at or above the COLD
FULL level on the bottle. The radiator normally remains
completely full, so there is no need to remove the radiator
cap unless checking for coolant freeze point or replacing
coolant. Advise your service attendant of this. As long as
the engine operating temperature is satisfactory, the
coolant bottle need only be checked once a month.
When additional coolant is needed to maintain the
proper level, it should be added to the coolant recovery
bottle. Do not overfill.
Points To Remember
NOTE: When the vehicle is stopped after a few miles of
operation, you may observe vapor coming from the front
of the engine compartment. This is normally a result of
306 MAINTAINING YOUR VEHICLE