Coolant Surge Tank Pressure Cap; Engine Overheating - Cadillac 2007 XLR Owner's Manual

Adding Coolant
If you need more coolant, add the proper
®
DEX-COOL coolant mixture at the surge tank,
but only when the engine is cool.
CAUTION:
{
You can be burned if you spill coolant on
hot engine parts. Coolant contains
ethylene glycol, and it will burn if the
engine parts are hot enough. Do not spill
coolant on a hot engine.
When replacing the pressure cap, press down and
turn it clockwise until you hear a clicking sound.
Make sure the cap is hand-tight and fully seated.
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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.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. See Engine
Compartment Overview on page 374 for more
information on location.

Engine Overheating

You will find a COOLANT OVER TEMP message
or an ENGINE HOT, STOP ENGINE message
displayed in the Driver Information Center (DIC).
See DIC Warnings and Messages on page 206.
You will also hear a chime.
There is also an engine coolant temperature gage
on the instrument panel cluster. See Engine
Coolant Temperature Gage on page 195.