Radiator Pressure Cap; Coolant Surge Tank Pressure Cap; Engine Overheating - Buick lucerne 2009 Owner's Manual

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If the coolant in the recovery tank is constantly low, you
should have a dealer/retailer service department inspect
the vehicle for leaks.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may occur.
Be sure the cap is properly and tightly secured.

Radiator Pressure Cap

Notice: The radiator cap on your vehicle is a
pressure-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap line
up with the overflow tube on the radiator filler neck.
See Engine Compartment Overview on page 5-14 for
more information on location.

Coolant Surge Tank Pressure Cap

Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may occur.
Be sure the cap is properly and tightly secured.
See Engine Compartment Overview on page 5-14 for
more information on location.

Engine Overheating

The vehicle has several indicators to warn of engine
overheating.
You will find a warning light about a hot engine as well
as an engine coolant temperature gage on your
vehicle's instrument panel cluster.
You may decide not to lift the hood when this warning
appears, but instead get service help right away.
See Roadside Assistance Program on page 7-7.
If you do decide to lift the hood, make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are running.
If the engine is overheating, both fans should be running.
If they are not, do not continue to run the engine and
have the vehicle serviced.
Notice: Engine damage from running the engine
without coolant is not covered by the warranty.
Notice: If the engine catches fire while driving with
no coolant, the vehicle can be badly damaged.
The costly repairs would not be covered by
the vehicle warranty. See Overheated Engine
Protection Operating Mode on page 5-37 for
information on driving to a safe place in an
emergency.
5-35

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