Chevrolet Corvette Owner's Manual page 226

2. Engine Cooling Fan (Out
of View)
LT4 Engine (Z06)
1. Coolant Surge Tank with
Pressure Cap
2. Engine Cooling Fan (Out
of View)
Warning
An underbonnet electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underbonnet
electric fan.
Warning
Do not touch heater or radiator
hoses, or other engine parts.
They can be very hot and can
burn you. Do not run the engine if
there is a leak; all coolant could
leak out. That could cause an
engine fire and can burn you. Fix
any leak before driving the
vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL engine
coolant. See Recommended Fluids
and Lubricants 0 297. The fluid
requires changing at certain
intervals. See Scheduled
Maintenance 0 294.
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 0 229.
Vehicle Care
What to Use
Warning
Plain water, or other liquids such
as alcohol, may boil before the
proper coolant mixture does. With
plain water or the wrong mixture,
the engine could get too hot but
there would not be an overheat
warning. The engine could catch
fire and you or others could be
burned.
Use a mixture of 40% DEX-COOL
coolant and 60% clean, drinkable
water. If using this mixture, nothing
else needs to be added. This
mixture:
Gives freezing protection down
to 28 °C ( 18 °F), outside
temperature.
Gives boiling protection up to
129 °C (265 °F), engine
temperature.
Protects against rust and
corrosion.
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