Engine Coolant - Cadillac 1999 Eldorado 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.
If your thermostat needs to be replaced, a GM
thermostat is recommended.

Engine Coolant

The cooling system in your vehicle is filled with
R
-
DEX COOL engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs first, if you add only
R
-
DEX COOL extended life 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
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.
yellowblue
_ _
- -
34 F ( 37 C).
_ _
F (129 C).
-
free) coolant.
-
COOL is added to the
--
at
COOL R is not
-
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