Engine Coolant; What To Use - Cadillac CTS-V 2009 Owner's Manual

Engine Coolant

The cooling system in the vehicle for all engines and
the intercooler is filled with DEX-COOL
designed to remain in the vehicle for five years or
150,000 miles (240 000 km), whichever occurs first.
The following explains the cooling system and how to
check and add coolant when it is low. If there is a
problem with engine overheating, see Engine
Overheating on page 5-37.

What to Use

CAUTION:
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Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper coolant
mixture will. The vehicle's coolant warning system
is set for the proper coolant mixture. With plain
water or the wrong mixture, the engine could get
too hot but you would not get the overheat
warning. The engine could catch fire and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL
5-32
Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
needs to be added. This mixture:
®
. This coolant is
•
•
•
•
•
Notice: If an improper coolant mixture is used, the
engine could overheat and be badly damaged. The
repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
Notice: If extra inhibitors and/or additives are used
in the vehicle's cooling system, the vehicle could
be damaged. Use only the proper mixture of
the engine coolant listed in this manual for the
cooling system. See Recommended Fluids and
Lubricants on page 6-14 for more information.
®
coolant.
®
coolant. If using this mixture, nothing else
Gives freezing protection down to −34°F (−37°C),
outside temperature.
Gives boiling protection up to 265°F (129°C),
engine temperature.
Protects against rust and corrosion.
Will not damage aluminum parts.
Helps keep the proper engine temperature.