Engine Coolant - Chevrolet Metro 1999 Owner's Manual

Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches a preset temperature.
When you replace your thermostat, an ACDelco
thermostat is recommended.

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" in
the Index.
A 50/50 mixture of clean, drinkable water and the
proper coolant will:
D
Give freezing protection down to
D
Give boiling protection up to 258
D
Protect against rust and corrosion.
D
Help keep the proper engine temperature.
D
Let the warning lights and gages work as
they should.
What to Use
Use a mixture of one
one
which won't damage aluminum parts. You can also use a
recycled coolant conforming to GM Specification
R
1825
you use this coolant mixture, you don't need to add
anything else.
_ _
- -
33 F ( 36 C).
_ _
F (125 C).
-
half clean, drinkable water and
-
half coolant that meets GM Specification 1825
-
M with a complete coolant flush and refill. If
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 the
proper coolant.
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-
M,
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