Saturn 2007 Relay Owner's Manual page 440

How to Add Coolant to the Coolant
Recovery Tank
If you have not found a problem yet, but the
coolant level is not at or above the full cold mark,
add a 50/50 mixture of clean, drinkable water
®
and DEX-COOL engine coolant at the coolant
recovery tank. See Engine Coolant on page 432
for more information.
440
CAUTION:
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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 would not 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: In cold weather, water can freeze and
crack the engine, radiator, heater core and
other parts. Use the recommended coolant and
the proper coolant mixture.