Pontiac 2004 Grand Prix - Manual (Page 307)

A 50/50 mixture of clean, drinkable water and
DEX-COOL
® engine coolant will:
• Give freezing protection down to
−
34°F (
−
37°C).
• Give boiling protection up to 265°F (129°C).
• Protect against rust and corrosion.
• Help keep the proper engine temperature.
• Let the warning lights and gages work as they
should.
Notice: When adding coolant, it is important that
you use only DEX-COOL ® (silicate-free) coolant.
If coolant other than DEX-COOL ® is added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the engine
coolant will require change sooner – at 30,000 miles
(50,000 km) or 24 months, whichever occurs first.
Damage caused by the use of coolant other
than DEX-COOL
® is not covered by your new vehicle
warranty.
What to Use
Use a mixture of one-half clean, drinkable water and
one-half DEX-COOL
® engine coolant which won’t
damage 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 such as 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 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,
have your dealer check your cooling system.
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.
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