Chevrolet 2003 Cavalier Owner's Manual page 240

Checking Coolant
Your vehicle's coolant warning system
is
set
for the proper coolant mixture. With plain
water or the wrong mixture, your engine could
get too hot but you wouldn't get the overheat
warning. Your engine could catch fire and you
or others could be burned. Use a 50/50 mixture
of clean, drinkable water and DEX-COOL@
coolant.
Notice: If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core and
other parts.
If you have to add coolant more than four times a year,
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Notice: If you use the proper coolant, you don't
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.
Turning the s 3e tank pressure cap when the
and scalding liquids to blow out and burn
you badly. Never turn the surge tank pressure
cap
-
even a little
-
when the engine and
radiator are hot.
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