Chevrolet 2003 tracker, Owner'S Manual

Page: 244 / 372

Engine Coolant
The following explains your cooling system and how to
add coolant when it is low. If you have a problem
with engine overheating, see
Engine Overheating on
page 5-31.
A 50/50 mixture of clean, drinkable water and the proper
coolant will:
•
Give freezing protection down to
−
33°F (
−
36°C)
•
Give boiling protection up to 258°F (125°C).
•
Protect against rust and corrosion.
•
Help keep the proper engine temperature.
•
Let the warning lights and gages work as they
should.
What to Use
Use a 50/50 mixture of
clean, drinkable water and coolant
that meets GM Specification 1825-M, which won’t
damage aluminum parts. You can also use a recycled
coolant conforming to GM Specification 1825-M with a
complete coolant flush and refill. 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 the proper 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.
5-28