Pontiac 1999 Montana Owner's Manual page 328

A 50/50 mixture of clean, drinkable water and
R
-
DEX COOL coolant will:
D
Give freezing protection down to
D
Give boiling protection up to 265
D
Protect against rust and corrosion.
D
Help keep the proper engine temperature.
D
Let the warning lights and gages work as
they should.
NOTICE:
When adding coolant, it is important that you use
COOL R (silicate
-
only DEX
If coolant other than DEX
system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the use
of coolant other than DEX
covered by your new vehicle warranty.
6-22
_ _
- -
34 F ( 37 C).
_ _
F (129 C).
-
free) coolant.
-
COOL is added to the
--
at
COOL R is not
-
What to Use
-
Use a mixture of one half clean, drinkable water and
COOL R coolant which won't damage
- -
one half DEX
aluminum parts. If you use this coolant mixture, you
don't need to add anything else.
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mixture will. 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
COOL R coolant.
-
DEX
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